I tried this code:
Cargo.toml:
[package]
name = "bmp-minimal"
version = "0.1.0"
authors = ["Malloc Voidstar <1284317+AlyoshaVasilieva@users.noreply.github.com>"]
edition = "2018"
[dependencies]
[profile.release]
lto = true
codegen-units = 1
main.rs:
use std::io::Write;
fn main() {
let mut out = Vec::with_capacity(51200);
for val in 0u8..=255 {
out.write_all(&[val, val, val, 0]).unwrap();
}
for _ in (0..1).rev() {
for _ in 0..1 {
out.write_all(&[0]).unwrap();
}
}
println!("{} bytes written", out.len());
}(extremely minimized form of grayscale BMP encoding from image crate)
Command: cargo run --release
I expected to see this happen: 1025 bytes written
Instead, this happened:
memory allocation of 26843545600 bytes failederror: process didn't exit successfully: `target\release\bmp-minimal.exe` (exit code: 0xc0000409, STATUS_STACK_BUFFER_OVERRUN)
Meta
rustc --version --verbose:
rustc 1.45.0 (5c1f21c3b 2020-07-13)
binary: rustc
commit-hash: 5c1f21c3b82297671ad3ae1e8c942d2ca92e84f2
commit-date: 2020-07-13
host: x86_64-pc-windows-msvc
release: 1.45.0
LLVM version: 10.0
It appears to work fine on ARM Linux in my limited testing.
This minimized form works/doesn't work on the following versions:
| Rust version |
Works? |
| 1.45 (LLVM 10.0) |
No |
| 1.44.1 |
No |
| 1.43.1 |
Yes |
| 1.42.0 |
No |
| 1.41.1 |
No |
| 1.40.0 |
No |
| 1.39.0 |
No |
| 1.38.0 (LLVM 9.0) |
No |
| 1.37.0 |
Yes |
| 1.36.0 |
Yes |
| 1.35.0 |
Yes |
| 1.34.0 |
Yes |
If the LTO and codegen-units settings are removed it works on all above versions.
I originally noticed this when a project that worked on 1.44.1 suddenly started failing with huge memory allocations on 1.45, so this table specifically applies to this repro, not whatever the underlying bug is.
I tried this code:
Cargo.toml:
main.rs:
(extremely minimized form of grayscale BMP encoding from
imagecrate)Command:
cargo run --releaseI expected to see this happen:
1025 bytes writtenInstead, this happened:
Meta
rustc --version --verbose:It appears to work fine on ARM Linux in my limited testing.
This minimized form works/doesn't work on the following versions:
If the LTO and codegen-units settings are removed it works on all above versions.
I originally noticed this when a project that worked on 1.44.1 suddenly started failing with huge memory allocations on 1.45, so this table specifically applies to this repro, not whatever the underlying bug is.