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Free regions in optimized MIR when compiling futures-util with -Zmir-opt-level=3 #108720

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#108787
Closed
Free regions in optimized MIR when compiling futures-util with -Zmir-opt-level=3#108720
#108787
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C-bugCategory: This is a bug.I-ICEIssue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.requires-debug-assertionsThis issue requires a build of rustc or tooling with debug-assertions in some way

Description

@saethlin
saethlin
opened on Mar 4, 2023

Code

RUSTFLAGS="-Zmir-opt-level=3" cargo +master-stage1 b --release --all-features

building a download of futures-util v0.3.26 (found trying to install the latest cargo-lambda)

Meta

This uh doesn't reproduce on current nightly, because the ICE is from a debug assertion. My master-stage is a stage1 build of commit 44cfafe2fafe816395d3acc434663a45d5178c41, with debug assertions enabled. The assertion is here:

rust/compiler/rustc_mir_transform/src/lib.rs

Line 629 in bb18388

debug_assert!(!body.has_free_regions(), "Free regions in optimized MIR");

Error output

thread 'rustc' panicked at 'Free regions in optimized MIR', compiler/rustc_mir_transform/src/lib.rs:629:5
Backtrace 

thread 'rustc' panicked at 'Free regions in optimized MIR', compiler/rustc_mir_transform/src/lib.rs:629:5
stack backtrace:
   0:     0x7f54566eb3c4 - std::backtrace_rs::backtrace::libunwind::trace::h7966bd9c0da533fe
                               at /home/ben/rust-master/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
   1:     0x7f54566eb3c4 - std::backtrace_rs::backtrace::trace_unsynchronized::h0f0949268ccbbd83
                               at /home/ben/rust-master/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7f54566eb3c4 - std::sys_common::backtrace::_print_fmt::h50f4283569f412a0
                               at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:65:5
   3:     0x7f54566eb3c4 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h7c33df3431979079
                               at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:44:22
   4:     0x7f5456765d48 - core::fmt::write::h276eb90a7387651c
                               at /home/ben/rust-master/library/core/src/fmt/mod.rs:1232:17
   5:     0x7f54566a56b1 - std::io::Write::write_fmt::hc56f53cfa1ab6df1
                               at /home/ben/rust-master/library/std/src/io/mod.rs:1684:15
   6:     0x7f54566eb1c5 - std::sys_common::backtrace::_print::h3569d071d6e2054e
                               at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:47:5
   7:     0x7f54566eb1c5 - std::sys_common::backtrace::print::hc79f4dd4263bba6c
                               at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:34:9
   8:     0x7f54566a9234 - std::panicking::default_hook::{{closure}}::h67641bc2b9f937d5
   9:     0x7f54566a8ea1 - std::panicking::default_hook::h954437b49ced1d7c
                               at /home/ben/rust-master/library/std/src/panicking.rs:290:9
  10:     0x7f5457351335 - <alloc[185f63cc1a382ef1]::boxed::Box<dyn for<'a, 'b> core[e6cc6f8dfa096f29]::ops::function::Fn<(&'a core[e6cc6f8dfa096f29]::panic::panic_info::PanicInfo<'b>,), Output = ()> + core[e6cc6f8dfa096f29]::marker::Send + core[e6cc6f8dfa096f29]::marker::Sync> as core[e6cc6f8dfa096f29]::ops::function::Fn<(&core[e6cc6f8dfa096f29]::panic::panic_info::PanicInfo,)>>::call
                               at /home/ben/rust-master/library/alloc/src/boxed.rs:2001:9
  11:     0x7f5457351335 - rustc_driver_impl[dfcbfdeaaa914981]::DEFAULT_HOOK::{closure#0}::{closure#0}
                               at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:1184:17
  12:     0x7f54566a9b35 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hbf7133cd63dbd8f8
                               at /home/ben/rust-master/library/alloc/src/boxed.rs:2001:9
  13:     0x7f54566a9b35 - std::panicking::rust_panic_with_hook::h291538613d1620d6
                               at /home/ben/rust-master/library/std/src/panicking.rs:696:13
  14:     0x7f54566eb6d2 - std::panicking::begin_panic_handler::{{closure}}::h5bd3c8e28be18480
                               at /home/ben/rust-master/library/std/src/panicking.rs:581:13
  15:     0x7f54566eb4dc - std::sys_common::backtrace::__rust_end_short_backtrace::h6f40ed7af405d4c3
                               at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:150:18
  16:     0x7f54566a9672 - rust_begin_unwind
                               at /home/ben/rust-master/library/std/src/panicking.rs:579:5
  17:     0x7f545667b023 - core::panicking::panic_fmt::h0df763632a2fc469
                               at /home/ben/rust-master/library/core/src/panicking.rs:64:14
  18:     0x7f5457e3b08e - rustc_mir_transform[81f33f476bb0ad54]::inner_optimized_mir
  19:     0x7f5457e3b08e - rustc_mir_transform[81f33f476bb0ad54]::optimized_mir
                               at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:602:21
  20:     0x7f54592758c1 - <rustc_query_impl[bd6e71e139dc9f0a]::queries::optimized_mir as rustc_query_system[d59f2c6f07b8a38a]::query::config::QueryConfig<rustc_query_impl[bd6e71e139dc9f0a]::plumbing::QueryCtxt>>::compute
                               at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:505:21
  21:     0x7f54592758c1 - rustc_query_system[d59f2c6f07b8a38a]::query::plumbing::execute_job::<rustc_query_impl[bd6e71e139dc9f0a]::queries::optimized_mir, rustc_query_impl[bd6e71e139dc9f0a]::plumbing::QueryCtxt>::{closure#0}
                               at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:421:71
  22:     0x7f54592758c1 - rustc_middle[3c9de0e076cabeff]::ty::context::tls::tlv::with_tlv::<rustc_query_system[d59f2c6f07b8a38a]::query::plumbing::execute_job<rustc_query_impl[bd6e71e139dc9f0a]::queries::optimized_mir, rustc_query_impl[bd6e71e139dc9f0a]::plumbing::QueryCtxt>::{closure#0}, &rustc_middle[3c9de0e076cabeff]::mir::Body>
                               at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:94:9
  23:     0x7f54592758c1 - rustc_middle[3c9de0e076cabeff]::ty::context::tls::enter_context::<rustc_query_system[d59f2c6f07b8a38a]::query::plumbing::execute_job<rustc_query_impl[bd6e71e139dc9f0a]::queries::optimized_mir, rustc_query_impl[bd6e71e139dc9f0a]::plumbing::QueryCtxt>::{closure#0}, &rustc_middle[3c9de0e076cabeff]::mir::Body>
                               at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:114:5
  24:     0x7f54592758c1 - <rustc_query_impl[bd6e71e139dc9f0a]::plumbing::QueryCtxt as rustc_query_system[d59f2c6f07b8a38a]::query::QueryContext>::start_query::<&rustc_middle[3c9de0e076cabeff]::mir::Body, rustc_query_system[d59f2c6f07b8a38a]::query::plumbing::execute_job<rustc_query_impl[bd6e71e139dc9f0a]::queries::optimized_mir, rustc_query_impl[bd6e71e139dc9f0a]::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
                               at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:127:13
  25:     0x7f54592758c1 - rustc_middle[3c9de0e076cabeff]::ty::context::tls::with_related_context::<<rustc_query_impl[bd6e71e139dc9f0a]::plumbing::QueryCtxt as rustc_query_system[d59f2c6f07b8a38a]::query::QueryContext>::start_query<&rustc_middle[3c9de0e076cabeff]::mir::Body, rustc_query_system[d59f2c6f07b8a38a]::query::plumbing::execute_job<rustc_query_impl[bd6e71e139dc9f0a]::queries::optimized_mir, rustc_query_impl[bd6e71e139dc9f0a]::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, &rustc_middle[3c9de0e076cabeff]::mir::Body>::{closure#0}
                               at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:164:9
  26:     0x7f54592758c1 - rustc_middle[3c9de0e076cabeff]::ty::context::tls::with_context::<rustc_middle[3c9de0e076cabeff]::ty::context::tls::with_related_context<<rustc_query_impl[bd6e71e139dc9f0a]::plumbing::QueryCtxt as rustc_query_system[d59f2c6f07b8a38a]::query::QueryContext>::start_query<&rustc_middle[3c9de0e076cabeff]::mir::Body, rustc_query_system[d59f2c6f07b8a38a]::query::plumbing::execute_job<rustc_query_impl[bd6e71e139dc9f0a]::queries::optimized_mir, rustc_query_impl[bd6e71e139dc9f0a]::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, &rustc_middle[3c9de0e076cabeff]::mir::Body>::{closure#0}, &rustc_middle[3c9de0e076cabeff]::mir::Body>::{closure#0}
                               at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:142:36
  27:     0x7f54592758c1 - rustc_middle[3c9de0e076cabeff]::ty::context::tls::with_context_opt::<rustc_middle[3c9de0e076cabeff]::ty::context::tls::with_context<rustc_middle[3c9de0e076cabeff]::ty::context::tls::with_related_context<<rustc_query_impl[bd6e71e139dc9f0a]::plumbing::QueryCtxt as rustc_query_system[d59f2c6f07b8a38a]::query::QueryContext>::start_query<&rustc_middle[3c9de0e076cabeff]::mir::Body, rustc_query_system[d59f2c6f07b8a38a]::query::plumbing::execute_job<rustc_query_impl[bd6e71e139dc9f0a]::queries::optimized_mir, rustc_query_impl[bd6e71e139dc9f0a]::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, &rustc_middle[3c9de0e076cabeff]::mir::Body>::{closure#0}, &rustc_middle[3c9de0e076cabeff]::mir::Body>::{closure#0}, &rustc_middle[3c9de0e076cabeff]::mir::Body>
                               at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:131:18
  28:     0x7f54592758c1 - rustc_middle[3c9de0e076cabeff]::ty::context::tls::with_context::<rustc_middle[3c9de0e076cabeff]::ty::context::tls::with_related_context<<rustc_query_impl[bd6e71e139dc9f0a]::plumbing::QueryCtxt as rustc_query_system[d59f2c6f07b8a38a]::query::QueryContext>::start_query<&rustc_middle[3c9de0e076cabeff]::mir::Body, rustc_query_system[d59f2c6f07b8a38a]::query::plumbing::execute_job<rustc_query_impl[bd6e71e139dc9f0a]::queries::optimized_mir, rustc_query_impl[bd6e71e139dc9f0a]::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, &rustc_middle[3c9de0e076cabeff]::mir::Body>::{closure#0}, &rustc_middle[3c9de0e076cabeff]::mir::Body>
                               at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:142:5
  29:     0x7f54592758c1 - rustc_middle[3c9de0e076cabeff]::ty::context::tls::with_related_context::<<rustc_query_impl[bd6e71e139dc9f0a]::plumbing::QueryCtxt as rustc_query_system[d59f2c6f07b8a38a]::query::QueryContext>::start_query<&rustc_middle[3c9de0e076cabeff]::mir::Body, rustc_query_system[d59f2c6f07b8a38a]::query::plumbing::execute_job<rustc_query_impl[bd6e71e139dc9f0a]::queries::optimized_mir, rustc_query_impl[bd6e71e139dc9f0a]::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, &rustc_middle[3c9de0e076cabeff]::mir::Body>
                               at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:155:5
  30:     0x7f54592758c1 - <rustc_query_impl[bd6e71e139dc9f0a]::plumbing::QueryCtxt as rustc_query_system[d59f2c6f07b8a38a]::query::QueryContext>::start_query::<&rustc_middle[3c9de0e076cabeff]::mir::Body, rustc_query_system[d59f2c6f07b8a38a]::query::plumbing::execute_job<rustc_query_impl[bd6e71e139dc9f0a]::queries::optimized_mir, rustc_query_impl[bd6e71e139dc9f0a]::plumbing::QueryCtxt>::{closure#0}>
                               at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:112:9
  31:     0x7f54592758c1 - rustc_query_system[d59f2c6f07b8a38a]::query::plumbing::execute_job::<rustc_query_impl[bd6e71e139dc9f0a]::queries::optimized_mir, rustc_query_impl[bd6e71e139dc9f0a]::plumbing::QueryCtxt>
                               at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:421:22
  32:     0x7f54592758c1 - rustc_query_system[d59f2c6f07b8a38a]::query::plumbing::try_execute_query::<rustc_query_impl[bd6e71e139dc9f0a]::queries::optimized_mir, rustc_query_impl[bd6e71e139dc9f0a]::plumbing::QueryCtxt>
                               at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:365:44
  33:     0x7f5458f5b17a - rustc_query_system[d59f2c6f07b8a38a]::query::plumbing::get_query::<rustc_query_impl[bd6e71e139dc9f0a]::queries::optimized_mir, rustc_query_impl[bd6e71e139dc9f0a]::plumbing::QueryCtxt, rustc_middle[3c9de0e076cabeff]::dep_graph::dep_node::DepKind>::{closure#0}
                               at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:750:36
  34:     0x7f5458f5b17a - stacker[6c4b829cc070632a]::maybe_grow::<(&rustc_middle[3c9de0e076cabeff]::mir::Body, core[e6cc6f8dfa096f29]::option::Option<rustc_query_system[d59f2c6f07b8a38a]::dep_graph::graph::DepNodeIndex>), rustc_query_system[d59f2c6f07b8a38a]::query::plumbing::get_query<rustc_query_impl[bd6e71e139dc9f0a]::queries::optimized_mir, rustc_query_impl[bd6e71e139dc9f0a]::plumbing::QueryCtxt, rustc_middle[3c9de0e076cabeff]::dep_graph::dep_node::DepKind>::{closure#0}>
                               at /home/ben/.cargo/registry/src/github.com-1ecc6299db9ec823/stacker-0.1.15/src/lib.rs:55:9
  35:     0x7f5458f5b17a - rustc_data_structures[9eb96948a4ae89da]::stack::ensure_sufficient_stack::<(&rustc_middle[3c9de0e076cabeff]::mir::Body, core[e6cc6f8dfa096f29]::option::Option<rustc_query_system[d59f2c6f07b8a38a]::dep_graph::graph::DepNodeIndex>), rustc_query_system[d59f2c6f07b8a38a]::query::plumbing::get_query<rustc_query_impl[bd6e71e139dc9f0a]::queries::optimized_mir, rustc_query_impl[bd6e71e139dc9f0a]::plumbing::QueryCtxt, rustc_middle[3c9de0e076cabeff]::dep_graph::dep_node::DepKind>::{closure#0}>
                               at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  36:     0x7f5458f5b17a - rustc_query_system[d59f2c6f07b8a38a]::query::plumbing::get_query::<rustc_query_impl[bd6e71e139dc9f0a]::queries::optimized_mir, rustc_query_impl[bd6e71e139dc9f0a]::plumbing::QueryCtxt, rustc_middle[3c9de0e076cabeff]::dep_graph::dep_node::DepKind>
                               at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:750:9
  37:     0x7f5458f5b17a - <rustc_query_impl[bd6e71e139dc9f0a]::Queries as rustc_middle[3c9de0e076cabeff]::ty::query::QueryEngine>::optimized_mir::{closure#0}
                               at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:742:17
  38:     0x7f5458f5b17a - <rustc_query_impl[bd6e71e139dc9f0a]::Queries as rustc_middle[3c9de0e076cabeff]::ty::query::QueryEngine>::optimized_mir
                               at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:46:1
  39:     0x7f5459959c79 - <rustc_middle[3c9de0e076cabeff]::ty::query::TyCtxtAt>::optimized_mir::<rustc_span[81fb46c8d825f89f]::def_id::LocalDefId>
                               at /home/ben/rust-master/compiler/rustc_middle/src/ty/query.rs:310:29
  40:     0x7f5459959c79 - <rustc_middle[3c9de0e076cabeff]::ty::context::TyCtxt>::optimized_mir::<rustc_span[81fb46c8d825f89f]::def_id::LocalDefId>
                               at /home/ben/rust-master/compiler/rustc_middle/src/ty/query.rs:296:35
  41:     0x7f5459959c79 - <rustc_metadata[b464f6c3a9ed8a3e]::rmeta::encoder::EncodeContext>::encode_mir
                               at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1404:78
  42:     0x7f5459959c79 - <rustc_metadata[b464f6c3a9ed8a3e]::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#14}
                               at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:610:29
  43:     0x7f5459959c79 - <rustc_metadata[b464f6c3a9ed8a3e]::rmeta::encoder::EncodeContext>::encode_crate_root
                               at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:610:13
  44:     0x7f545996cccc - rustc_metadata[b464f6c3a9ed8a3e]::rmeta::encoder::encode_metadata_impl
                               at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2195:16
  45:     0x7f545984d859 - rustc_metadata[b464f6c3a9ed8a3e]::rmeta::encoder::encode_metadata::{closure#0}
                               at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2146:12
  46:     0x7f545984d859 - rustc_data_structures[9eb96948a4ae89da]::sync::join::<rustc_metadata[b464f6c3a9ed8a3e]::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata[b464f6c3a9ed8a3e]::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
                               at /home/ben/rust-master/compiler/rustc_data_structures/src/sync.rs:121:14
  47:     0x7f545996c0b3 - rustc_metadata[b464f6c3a9ed8a3e]::rmeta::encoder::encode_metadata
                               at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2145:5
  48:     0x7f545991155d - rustc_metadata[b464f6c3a9ed8a3e]::fs::encode_and_write_metadata
                               at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:86:13
  49:     0x7f5457461ac6 - rustc_interface[5037f0077237394]::passes::start_codegen
                               at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:865:44
  50:     0x7f5457464da7 - <rustc_interface[5037f0077237394]::queries::Queries>::ongoing_codegen::{closure#0}::{closure#0}
                               at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:243:20
  51:     0x7f5457464da7 - <rustc_middle[3c9de0e076cabeff]::ty::context::GlobalCtxt>::enter::<<rustc_interface[5037f0077237394]::queries::Queries>::ongoing_codegen::{closure#0}::{closure#0}, core[e6cc6f8dfa096f29]::result::Result<alloc[185f63cc1a382ef1]::boxed::Box<dyn core[e6cc6f8dfa096f29]::any::Any>, rustc_span[81fb46c8d825f89f]::ErrorGuaranteed>>::{closure#0}
                               at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:555:37
  52:     0x7f5457464da7 - rustc_middle[3c9de0e076cabeff]::ty::context::tls::tlv::with_tlv::<<rustc_middle[3c9de0e076cabeff]::ty::context::GlobalCtxt>::enter<<rustc_interface[5037f0077237394]::queries::Queries>::ongoing_codegen::{closure#0}::{closure#0}, core[e6cc6f8dfa096f29]::result::Result<alloc[185f63cc1a382ef1]::boxed::Box<dyn core[e6cc6f8dfa096f29]::any::Any>, rustc_span[81fb46c8d825f89f]::ErrorGuaranteed>>::{closure#0}, core[e6cc6f8dfa096f29]::result::Result<alloc[185f63cc1a382ef1]::boxed::Box<dyn core[e6cc6f8dfa096f29]::any::Any>, rustc_span[81fb46c8d825f89f]::ErrorGuaranteed>>
                               at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:94:9
  53:     0x7f5457464da7 - rustc_middle[3c9de0e076cabeff]::ty::context::tls::enter_context::<<rustc_middle[3c9de0e076cabeff]::ty::context::GlobalCtxt>::enter<<rustc_interface[5037f0077237394]::queries::Queries>::ongoing_codegen::{closure#0}::{closure#0}, core[e6cc6f8dfa096f29]::result::Result<alloc[185f63cc1a382ef1]::boxed::Box<dyn core[e6cc6f8dfa096f29]::any::Any>, rustc_span[81fb46c8d825f89f]::ErrorGuaranteed>>::{closure#0}, core[e6cc6f8dfa096f29]::result::Result<alloc[185f63cc1a382ef1]::boxed::Box<dyn core[e6cc6f8dfa096f29]::any::Any>, rustc_span[81fb46c8d825f89f]::ErrorGuaranteed>>
                               at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:114:5
  54:     0x7f5457464da7 - <rustc_middle[3c9de0e076cabeff]::ty::context::GlobalCtxt>::enter::<<rustc_interface[5037f0077237394]::queries::Queries>::ongoing_codegen::{closure#0}::{closure#0}, core[e6cc6f8dfa096f29]::result::Result<alloc[185f63cc1a382ef1]::boxed::Box<dyn core[e6cc6f8dfa096f29]::any::Any>, rustc_span[81fb46c8d825f89f]::ErrorGuaranteed>>
                               at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:555:9
  55:     0x7f545743c444 - <rustc_interface[5037f0077237394]::queries::QueryResult<&rustc_middle[3c9de0e076cabeff]::ty::context::GlobalCtxt>>::enter::<core[e6cc6f8dfa096f29]::result::Result<alloc[185f63cc1a382ef1]::boxed::Box<dyn core[e6cc6f8dfa096f29]::any::Any>, rustc_span[81fb46c8d825f89f]::ErrorGuaranteed>, <rustc_interface[5037f0077237394]::queries::Queries>::ongoing_codegen::{closure#0}::{closure#0}>
                               at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:71:9
  56:     0x7f545743c444 - <rustc_interface[5037f0077237394]::queries::Queries>::ongoing_codegen::{closure#0}
                               at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:230:13
  57:     0x7f545743c444 - <rustc_interface[5037f0077237394]::queries::Query<alloc[185f63cc1a382ef1]::boxed::Box<dyn core[e6cc6f8dfa096f29]::any::Any>>>::compute::<<rustc_interface[5037f0077237394]::queries::Queries>::ongoing_codegen::{closure#0}>::{closure#0}::{closure#0}
                               at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:45:41
  58:     0x7f545743c444 - <core[e6cc6f8dfa096f29]::option::Option<core[e6cc6f8dfa096f29]::result::Result<rustc_data_structures[9eb96948a4ae89da]::steal::Steal<alloc[185f63cc1a382ef1]::boxed::Box<dyn core[e6cc6f8dfa096f29]::any::Any>>, rustc_span[81fb46c8d825f89f]::ErrorGuaranteed>>>::get_or_insert_with::<<rustc_interface[5037f0077237394]::queries::Query<alloc[185f63cc1a382ef1]::boxed::Box<dyn core[e6cc6f8dfa096f29]::any::Any>>>::compute<<rustc_interface[5037f0077237394]::queries::Queries>::ongoing_codegen::{closure#0}>::{closure#0}::{closure#0}>
                               at /home/ben/rust-master/library/core/src/option.rs:1712:49
  59:     0x7f545743c444 - <rustc_interface[5037f0077237394]::queries::Query<alloc[185f63cc1a382ef1]::boxed::Box<dyn core[e6cc6f8dfa096f29]::any::Any>>>::compute::<<rustc_interface[5037f0077237394]::queries::Queries>::ongoing_codegen::{closure#0}>::{closure#0}
                               at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:45:17
  60:     0x7f545743c444 - <core[e6cc6f8dfa096f29]::cell::RefMut<core[e6cc6f8dfa096f29]::option::Option<core[e6cc6f8dfa096f29]::result::Result<rustc_data_structures[9eb96948a4ae89da]::steal::Steal<alloc[185f63cc1a382ef1]::boxed::Box<dyn core[e6cc6f8dfa096f29]::any::Any>>, rustc_span[81fb46c8d825f89f]::ErrorGuaranteed>>>>::filter_map::<rustc_data_structures[9eb96948a4ae89da]::steal::Steal<alloc[185f63cc1a382ef1]::boxed::Box<dyn core[e6cc6f8dfa096f29]::any::Any>>, <rustc_interface[5037f0077237394]::queries::Query<alloc[185f63cc1a382ef1]::boxed::Box<dyn core[e6cc6f8dfa096f29]::any::Any>>>::compute<<rustc_interface[5037f0077237394]::queries::Queries>::ongoing_codegen::{closure#0}>::{closure#0}>
                               at /home/ben/rust-master/library/core/src/cell.rs:1588:15
  61:     0x7f545743c444 - <rustc_interface[5037f0077237394]::queries::Query<alloc[185f63cc1a382ef1]::boxed::Box<dyn core[e6cc6f8dfa096f29]::any::Any>>>::compute::<<rustc_interface[5037f0077237394]::queries::Queries>::ongoing_codegen::{closure#0}>
                               at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:42:9
  62:     0x7f545743c444 - <rustc_interface[5037f0077237394]::queries::Queries>::ongoing_codegen
                               at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:229:9
  63:     0x7f54573a3434 - rustc_driver_impl[dfcbfdeaaa914981]::run_compiler::{closure#1}::{closure#2}
                               at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:391:13
  64:     0x7f54573a3434 - <rustc_interface[5037f0077237394]::interface::Compiler>::enter::<rustc_driver_impl[dfcbfdeaaa914981]::run_compiler::{closure#1}::{closure#2}, core[e6cc6f8dfa096f29]::result::Result<core[e6cc6f8dfa096f29]::option::Option<rustc_interface[5037f0077237394]::queries::Linker>, rustc_span[81fb46c8d825f89f]::ErrorGuaranteed>>
                               at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:368:19
  65:     0x7f54573a3434 - rustc_driver_impl[dfcbfdeaaa914981]::run_compiler::{closure#1}
                               at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:327:22
  66:     0x7f54573a3434 - rustc_interface[5037f0077237394]::interface::run_compiler::<core[e6cc6f8dfa096f29]::result::Result<(), rustc_span[81fb46c8d825f89f]::ErrorGuaranteed>, rustc_driver_impl[dfcbfdeaaa914981]::run_compiler::{closure#1}>::{closure#0}::{closure#0}
                               at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:301:21
  67:     0x7f54573a3434 - rustc_span[81fb46c8d825f89f]::with_source_map::<core[e6cc6f8dfa096f29]::result::Result<(), rustc_span[81fb46c8d825f89f]::ErrorGuaranteed>, rustc_interface[5037f0077237394]::interface::run_compiler<core[e6cc6f8dfa096f29]::result::Result<(), rustc_span[81fb46c8d825f89f]::ErrorGuaranteed>, rustc_driver_impl[dfcbfdeaaa914981]::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
                               at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1027:5
  68:     0x7f545738fb88 - rustc_interface[5037f0077237394]::interface::run_compiler::<core[e6cc6f8dfa096f29]::result::Result<(), rustc_span[81fb46c8d825f89f]::ErrorGuaranteed>, rustc_driver_impl[dfcbfdeaaa914981]::run_compiler::{closure#1}>::{closure#0}
                               at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:295:13
  69:     0x7f545738fb88 - <scoped_tls[669fbe28a36a1627]::ScopedKey<rustc_span[81fb46c8d825f89f]::SessionGlobals>>::set::<rustc_interface[5037f0077237394]::interface::run_compiler<core[e6cc6f8dfa096f29]::result::Result<(), rustc_span[81fb46c8d825f89f]::ErrorGuaranteed>, rustc_driver_impl[dfcbfdeaaa914981]::run_compiler::{closure#1}>::{closure#0}, core[e6cc6f8dfa096f29]::result::Result<(), rustc_span[81fb46c8d825f89f]::ErrorGuaranteed>>
                               at /home/ben/.cargo/registry/src/github.com-1ecc6299db9ec823/scoped-tls-1.0.0/src/lib.rs:137:9
  70:     0x7f545735f1f0 - rustc_span[81fb46c8d825f89f]::create_session_globals_then::<core[e6cc6f8dfa096f29]::result::Result<(), rustc_span[81fb46c8d825f89f]::ErrorGuaranteed>, rustc_interface[5037f0077237394]::interface::run_compiler<core[e6cc6f8dfa096f29]::result::Result<(), rustc_span[81fb46c8d825f89f]::ErrorGuaranteed>, rustc_driver_impl[dfcbfdeaaa914981]::run_compiler::{closure#1}>::{closure#0}>
                               at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:112:5
  71:     0x7f545735f1f0 - rustc_interface[5037f0077237394]::util::run_in_thread_pool_with_globals::<rustc_interface[5037f0077237394]::interface::run_compiler<core[e6cc6f8dfa096f29]::result::Result<(), rustc_span[81fb46c8d825f89f]::ErrorGuaranteed>, rustc_driver_impl[dfcbfdeaaa914981]::run_compiler::{closure#1}>::{closure#0}, core[e6cc6f8dfa096f29]::result::Result<(), rustc_span[81fb46c8d825f89f]::ErrorGuaranteed>>::{closure#0}::{closure#0}
                               at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:152:38
  72:     0x7f545735f1f0 - std[7eb1f25088cfe367]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[5037f0077237394]::util::run_in_thread_pool_with_globals<rustc_interface[5037f0077237394]::interface::run_compiler<core[e6cc6f8dfa096f29]::result::Result<(), rustc_span[81fb46c8d825f89f]::ErrorGuaranteed>, rustc_driver_impl[dfcbfdeaaa914981]::run_compiler::{closure#1}>::{closure#0}, core[e6cc6f8dfa096f29]::result::Result<(), rustc_span[81fb46c8d825f89f]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[e6cc6f8dfa096f29]::result::Result<(), rustc_span[81fb46c8d825f89f]::ErrorGuaranteed>>
                               at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:134:18
  73:     0x7f5457363f73 - <std[7eb1f25088cfe367]::thread::Builder>::spawn_unchecked_::<rustc_interface[5037f0077237394]::util::run_in_thread_pool_with_globals<rustc_interface[5037f0077237394]::interface::run_compiler<core[e6cc6f8dfa096f29]::result::Result<(), rustc_span[81fb46c8d825f89f]::ErrorGuaranteed>, rustc_driver_impl[dfcbfdeaaa914981]::run_compiler::{closure#1}>::{closure#0}, core[e6cc6f8dfa096f29]::result::Result<(), rustc_span[81fb46c8d825f89f]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[e6cc6f8dfa096f29]::result::Result<(), rustc_span[81fb46c8d825f89f]::ErrorGuaranteed>>::{closure#1}::{closure#0}
                               at /home/ben/rust-master/library/std/src/thread/mod.rs:560:17
  74:     0x7f5457363f73 - <core[e6cc6f8dfa096f29]::panic::unwind_safe::AssertUnwindSafe<<std[7eb1f25088cfe367]::thread::Builder>::spawn_unchecked_<rustc_interface[5037f0077237394]::util::run_in_thread_pool_with_globals<rustc_interface[5037f0077237394]::interface::run_compiler<core[e6cc6f8dfa096f29]::result::Result<(), rustc_span[81fb46c8d825f89f]::ErrorGuaranteed>, rustc_driver_impl[dfcbfdeaaa914981]::run_compiler::{closure#1}>::{closure#0}, core[e6cc6f8dfa096f29]::result::Result<(), rustc_span[81fb46c8d825f89f]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[e6cc6f8dfa096f29]::result::Result<(), rustc_span[81fb46c8d825f89f]::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core[e6cc6f8dfa096f29]::ops::function::FnOnce<()>>::call_once
                               at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:271:9
  75:     0x7f5457363f73 - std[7eb1f25088cfe367]::panicking::try::do_call::<core[e6cc6f8dfa096f29]::panic::unwind_safe::AssertUnwindSafe<<std[7eb1f25088cfe367]::thread::Builder>::spawn_unchecked_<rustc_interface[5037f0077237394]::util::run_in_thread_pool_with_globals<rustc_interface[5037f0077237394]::interface::run_compiler<core[e6cc6f8dfa096f29]::result::Result<(), rustc_span[81fb46c8d825f89f]::ErrorGuaranteed>, rustc_driver_impl[dfcbfdeaaa914981]::run_compiler::{closure#1}>::{closure#0}, core[e6cc6f8dfa096f29]::result::Result<(), rustc_span[81fb46c8d825f89f]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[e6cc6f8dfa096f29]::result::Result<(), rustc_span[81fb46c8d825f89f]::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core[e6cc6f8dfa096f29]::result::Result<(), rustc_span[81fb46c8d825f89f]::ErrorGuaranteed>>
                               at /home/ben/rust-master/library/std/src/panicking.rs:487:40
  76:     0x7f5457363f73 - std[7eb1f25088cfe367]::panicking::try::<core[e6cc6f8dfa096f29]::result::Result<(), rustc_span[81fb46c8d825f89f]::ErrorGuaranteed>, core[e6cc6f8dfa096f29]::panic::unwind_safe::AssertUnwindSafe<<std[7eb1f25088cfe367]::thread::Builder>::spawn_unchecked_<rustc_interface[5037f0077237394]::util::run_in_thread_pool_with_globals<rustc_interface[5037f0077237394]::interface::run_compiler<core[e6cc6f8dfa096f29]::result::Result<(), rustc_span[81fb46c8d825f89f]::ErrorGuaranteed>, rustc_driver_impl[dfcbfdeaaa914981]::run_compiler::{closure#1}>::{closure#0}, core[e6cc6f8dfa096f29]::result::Result<(), rustc_span[81fb46c8d825f89f]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[e6cc6f8dfa096f29]::result::Result<(), rustc_span[81fb46c8d825f89f]::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
                               at /home/ben/rust-master/library/std/src/panicking.rs:451:19
  77:     0x7f5457363f73 - std[7eb1f25088cfe367]::panic::catch_unwind::<core[e6cc6f8dfa096f29]::panic::unwind_safe::AssertUnwindSafe<<std[7eb1f25088cfe367]::thread::Builder>::spawn_unchecked_<rustc_interface[5037f0077237394]::util::run_in_thread_pool_with_globals<rustc_interface[5037f0077237394]::interface::run_compiler<core[e6cc6f8dfa096f29]::result::Result<(), rustc_span[81fb46c8d825f89f]::ErrorGuaranteed>, rustc_driver_impl[dfcbfdeaaa914981]::run_compiler::{closure#1}>::{closure#0}, core[e6cc6f8dfa096f29]::result::Result<(), rustc_span[81fb46c8d825f89f]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[e6cc6f8dfa096f29]::result::Result<(), rustc_span[81fb46c8d825f89f]::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core[e6cc6f8dfa096f29]::result::Result<(), rustc_span[81fb46c8d825f89f]::ErrorGuaranteed>>
                               at /home/ben/rust-master/library/std/src/panic.rs:140:14
  78:     0x7f5457363f73 - <std[7eb1f25088cfe367]::thread::Builder>::spawn_unchecked_::<rustc_interface[5037f0077237394]::util::run_in_thread_pool_with_globals<rustc_interface[5037f0077237394]::interface::run_compiler<core[e6cc6f8dfa096f29]::result::Result<(), rustc_span[81fb46c8d825f89f]::ErrorGuaranteed>, rustc_driver_impl[dfcbfdeaaa914981]::run_compiler::{closure#1}>::{closure#0}, core[e6cc6f8dfa096f29]::result::Result<(), rustc_span[81fb46c8d825f89f]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[e6cc6f8dfa096f29]::result::Result<(), rustc_span[81fb46c8d825f89f]::ErrorGuaranteed>>::{closure#1}
                               at /home/ben/rust-master/library/std/src/thread/mod.rs:559:30
  79:     0x7f5457363f73 - <<std[7eb1f25088cfe367]::thread::Builder>::spawn_unchecked_<rustc_interface[5037f0077237394]::util::run_in_thread_pool_with_globals<rustc_interface[5037f0077237394]::interface::run_compiler<core[e6cc6f8dfa096f29]::result::Result<(), rustc_span[81fb46c8d825f89f]::ErrorGuaranteed>, rustc_driver_impl[dfcbfdeaaa914981]::run_compiler::{closure#1}>::{closure#0}, core[e6cc6f8dfa096f29]::result::Result<(), rustc_span[81fb46c8d825f89f]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[e6cc6f8dfa096f29]::result::Result<(), rustc_span[81fb46c8d825f89f]::ErrorGuaranteed>>::{closure#1} as core[e6cc6f8dfa096f29]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
                               at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  80:     0x7f54566a3528 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h14eced52fe478e0e
                               at /home/ben/rust-master/library/alloc/src/boxed.rs:1987:9
  81:     0x7f54566a3528 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h62f3eb9114f54e55
                               at /home/ben/rust-master/library/alloc/src/boxed.rs:1987:9
  82:     0x7f545668cf35 - std::sys::unix::thread::Thread::new::thread_start::h2516933a72271431
                               at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  83:     0x7f545689ebb5 - <unknown>
  84:     0x7f5456920d90 - <unknown>
  85:                0x0 - <unknown>

error: the compiler unexpectedly panicked. this is a bug.

note: we would appreciate a bug report: https://github.com/rust-lang/rust/issues/new?labels=C-bug%2C+I-ICE%2C+T-compiler&template=ice.md

note: rustc 1.69.0-dev running on x86_64-unknown-linux-gnu

note: compiler flags: --crate-type lib -C opt-level=3 -C embed-bitcode=no -Z mir-opt-level=3

note: some of the compiler flags provided by cargo are hidden

query stack during panic:
#0 [optimized_mir] optimizing MIR for `future::future::remote_handle::<impl at src/future/future/remote_handle.rs:92:1: 92:41>::poll`
end of query stack
error: could not compile `futures-util`

Activity

  1. saethlin
    added
    C-bugCategory: This is a bug.
    I-ICEIssue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️
    T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.
    requires-debug-assertionsThis issue requires a build of rustc or tooling with debug-assertions in some way
    on Mar 4, 2023
  2. bors
    closed this as completedin ac4379fon Mar 6, 2023
  3. matthiaskrgr
    added 2 commits that reference this issue on Mar 6, 2023

    Rollup merge of rust-lang#108786 - saethlin:free-regions-check, r=oli…

    773a533

    Rollup merge of rust-lang#108786 - saethlin:free-regions-check, r=oli…

    4bd6f7f
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    C-bugCategory: This is a bug.I-ICEIssue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.requires-debug-assertionsThis issue requires a build of rustc or tooling with debug-assertions in some way

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