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ice: too many arguments to fn_ptr: log (got 2 args, expected 1) #298
Description
//! Issue #56309
extern "C" {
fn log(message_data: u32, message_size: u32);
}
pub fn main() {
let message = "Hello, world!";
unsafe {
log(message.as_ptr() as u32, message.len() as u32);
}
}libgccjit.so: error: gcc_jit_context_new_call_through_ptr: too many arguments to fn_ptr: log (got 2 args, expected 1)
gcc_jit_rvalue_get_type: NULL rvalue
libgccjit.so: error: gcc_jit_function_new_local: NULL type
libgccjit.so: error: gcc_jit_block_add_assignment: NULL lvalue
gcc_jit_lvalue_as_rvalue: NULL lvalue
Activity
bjorn3 commentedon Jul 1, 2023
logis a function in libm. Gcc likely has it pre-declared with the same signature as the libm version to be able to replace it with a faster version at compile time. LLVM has the exact samw problem as I understand it. And in the past it also used to have to be an issue when#[link(wasm_import_module)]was used to import from a non-default module: rust-lang/rust#56309 The test is not meant to work outside of webassembly with#[link(wasm_import_module)]. https://github.com/rust-lang/rust/blob/e5bb341f0e1db4e4407f129d9834f9ada2030b7c/tests/run-make/wasm-symbols-different-module/log.rsantoyo commentedon Sep 24, 2025
I believe this is fixed now.
Are you able to reproduce?
GuillaumeGomez commentedon Jan 30, 2026
I opened #847 to ensure it.
Add regression test for <rust-lang#298>
Merge pull request #847 from GuillaumeGomez/log-test