Program crashes with #[track_caller] applied to main()

[flowbish]

Code

#[track_caller]
fn main() {
    panic!("{}: oh no", std::panic::Location::caller());
}

Meta

Crash occurs in both 1.46.0 beta and in current nightly.

rustc --version --verbose:

rustc 1.46.0-beta.2 (6f959902b 2020-07-23)
binary: rustc
commit-hash: 6f959902b3103c49ca981fbc01871589c3498489
commit-date: 2020-07-23
host: x86_64-unknown-linux-gnu
release: 1.46.0-beta.2
LLVM version: 10.0

rustc 1.47.0-nightly (81e754c35 2020-08-02)
binary: rustc
commit-hash: 81e754c359c471f91263813c46c67955071716a7
commit-date: 2020-08-02
host: x86_64-unknown-linux-gnu
release: 1.47.0-nightly
LLVM version: 10.0

Error output

memory allocation of 94396265198519 bytes failed

[flowbish]

I made the false assumption that this was rustc crashing, but it's actually the binary that crashes upon running it.

[Mark-Simulacrum]

Cc @anp

We probably just want to ban track caller on main (and maybe any lang item function?)

[lcnr]

@rustbot claim

[lcnr]

Same with #[naked]:

#![feature(naked_functions)]

#[naked]
fn main() {
    println!("hey");
}

results in

/playground/tools/entrypoint.sh: line 11: 7 Segmentation fault timeout --signal=KILL ${timeout} "$@"

edit: I think naked is a more general problem so I won't change that here

[JohnTitor]

Assigning P-high as discussed as part of the Prioritization Working Group procedure and removing I-prioritize.