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ICE: delay_span_bug const-construct-call.rs with mir-opt-level=2 #72679
Description
Code
code from ./src/test/ui/consts/const_constructor/const-construct-call.rs
#![cfg_attr(const_fn, feature(const_fn))]
// Ctor(..) is transformed to Ctor { 0: ... } in HAIR lowering, so directly
// calling constructors doesn't require them to be const.
type ExternalType = std::panic::AssertUnwindSafe<(Option<i32>, Result<i32, bool>)>;
const fn call_external_constructors_in_local_vars() -> ExternalType {
let f = Some;
let g = Err;
let h = std::panic::AssertUnwindSafe;
let x = f(5);
let y = g(false);
let z = h((x, y));
z
}
const CALL_EXTERNAL_CONSTRUCTORS_IN_LOCAL_VARS: ExternalType = {
let f = Some;
let g = Err;
let h = std::panic::AssertUnwindSafe;
let x = f(5);
let y = g(false);
let z = h((x, y));
z
};
fn main() {
assert_eq!(
(call_external_constructors_in_local_vars().0,),
(CALL_EXTERNAL_CONSTRUCTORS_IN_LOCAL_VARS.0,)
);
}Meta
rustc @ 664fcd3
Error output
RUST_BACKTRACE=full ./build/x86_64-unknown-linux-gnu/stage2/bin/rustc ./src/test/ui/consts/const_constructor/const-construct-call.rs -Zmir-opt-level=2
error: internal compiler error: error during interning should later cause validation failure
--> ./src/test/ui/consts/const_constructor/const-construct-call.rs:16:19
|
16 | let z = h((x, y));
| ^
error: internal compiler error: error during interning should later cause validation failure
--> ./src/test/ui/consts/const_constructor/const-construct-call.rs:16:15
|
16 | let z = h((x, y));
| ^^^^^^
error: internal compiler error: error during interning should later cause validation failure
--> /home/matthias/vcs/github/rust/src/libstd/panic.rs:190:1
|
190 | pub struct AssertUnwindSafe<T>(#[stable(feature = "catch_unwind", since = "1.9.0")] pub T);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
error: internal compiler error: error during interning should later cause validation failure
--> ./src/test/ui/consts/const_constructor/const-construct-call.rs:17:5
|
17 | z
| ^
thread 'rustc' panicked at 'no errors encountered even though `delay_span_bug` issued', src/librustc_errors/lib.rs:366:17
stack backtrace:
Backtrace
error: internal compiler error: error during interning should later cause validation failure
--> ./src/test/ui/consts/const_constructor/const-construct-call.rs:16:19
|
16 | let z = h((x, y));
| ^
error: internal compiler error: error during interning should later cause validation failure
--> ./src/test/ui/consts/const_constructor/const-construct-call.rs:16:15
|
16 | let z = h((x, y));
| ^^^^^^
error: internal compiler error: error during interning should later cause validation failure
--> /home/matthias/vcs/github/rust/src/libstd/panic.rs:190:1
|
190 | pub struct AssertUnwindSafe<T>(#[stable(feature = "catch_unwind", since = "1.9.0")] pub T);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
error: internal compiler error: error during interning should later cause validation failure
--> ./src/test/ui/consts/const_constructor/const-construct-call.rs:17:5
|
17 | z
| ^
thread 'rustc' panicked at 'no errors encountered even though `delay_span_bug` issued', src/librustc_errors/lib.rs:366:17
stack backtrace:
0: 0x7f62dc1a0da7 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h6321961b115ad0ed
1: 0x7f62dc1ecacd - core::fmt::write::h65255e7874586eb2
2: 0x7f62dc16fb15 - std::io::Write::write_fmt::h2bb22b139579a2ee
3: 0x7f62dc1830b0 - std::panicking::default_hook::{{closure}}::h7148d55d8fc14777
4: 0x7f62dc182dfa - std::panicking::default_hook::h0efe9af18be782dc
5: 0x7f62ddb1f153 - rustc_driver::report_ice::hfd0fa22509dd31ed
6: 0x7f62dc18379c - std::panicking::rust_panic_with_hook::h3927854bf3e90637
7: 0x7f62e1bbc09e - std::panicking::begin_panic::h8403099e8fc58511
8: 0x7f62e1bc6dfe - <rustc_errors::HandlerInner as core::ops::drop::Drop>::drop::h5f5494b6c3d74ec2
9: 0x7f62ddb64256 - core::ptr::drop_in_place::h0e133354b600ff56
10: 0x7f62ddb6f7d6 - <alloc::rc::Rc<T> as core::ops::drop::Drop>::drop::hbc25d3d2bfed6b41
11: 0x7f62ddafdf8d - core::ptr::drop_in_place::h92b501bcb6da9fde
12: 0x7f62ddae3d95 - rustc_interface::interface::run_compiler_in_existing_thread_pool::h03e608bcbd3c7d88
13: 0x7f62ddb30860 - rustc_ast::attr::with_globals::ha3a08bb414c4a8b6
14: 0x7f62ddb31d4a - std::sys_common::backtrace::__rust_begin_short_backtrace::h4ed2765ed1f89ac8
15: 0x7f62ddae77ee - core::ops::function::FnOnce::call_once{{vtable.shim}}::h60fb29569624bd70
16: 0x7f62dc183f2a - std::sys::unix::thread::Thread::new::thread_start::h61e3081ddeb255e9
17: 0x7f62dbeb046f - start_thread
18: 0x7f62dbfcd3d3 - clone
19: 0x0 - <unknown>
error: internal compiler error: unexpected panic
note: the compiler unexpectedly panicked. this is a bug.
note: we would appreciate a bug report: https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.md#bug-reports
note: rustc 1.45.0-dev running on x86_64-unknown-linux-gnu
note: compiler flags: -Z mir-opt-level=2
query stack during panic:
end of query stack
Activity
RalfJung commentedon Jun 2, 2020
Might be caused by #71665? That should have reduced the number of ICEs, not increased it, but who knows.^^
Rollup merge of rust-lang#73130 - wesleywiser:remove_const_prop_for_i…