rustc from homebrew produces SIGBUS: access to undefined memory when -v is provided

[DrGo]

I tried this code:

use std::path::{Path,PathBuf};
use std::{env,fs}; 

//TODO
// read src folder into a vec
// convert to typst
// compile to pdf

fn main() ->Result<(), AppError>{
   println!("Hello, world!");
    Ok(())
}

cargo build -v

I expected to see this happen: explanation
code checked and compiled

Instead, this happened: explanation
crash only when -v is provided

Caused by:
  process didn't exit successfully: `CARGO=/opt/homebrew/Cellar/rust/1.78.0/bin/cargo CARGO_BIN_NAME=rst CARGO_CRATE_NAME=rst CARGO_MANIFEST_DIR=/Users/drgo/local/code/booker/rs CARGO_PKG_AUTHORS='' CARGO_PKG_DESCRIPTION='' CARGO_PKG_HOMEPAGE='' CARGO_PKG_LICENSE='' CARGO_PKG_LICENSE_FILE='' CARGO_PKG_NAME=rst CARGO_PKG_README='' CARGO_PKG_REPOSITORY='' CARGO_PKG_RUST_VERSION='' CARGO_PKG_VERSION=0.1.0 CARGO_PKG_VERSION_MAJOR=0 CARGO_PKG_VERSION_MINOR=1 CARGO_PKG_VERSION_PATCH=0 CARGO_PKG_VERSION_PRE='' CARGO_PRIMARY_PACKAGE=1 DYLD_FALLBACK_LIBRARY_PATH='/Users/drgo/local/code/booker/rs/target/debug/deps:/Users/drgo/lib:/usr/local/lib:/usr/lib' rustc --crate-name rst --edition=2021 src/main.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --diagnostic-width=98 --crate-type bin --emit=dep-info,link -C embed-bitcode=no -C debuginfo=2 -C split-debuginfo=unpacked -C metadata=a4aaf64bcde3c91c -C extra-filename=-a4aaf64bcde3c91c --out-dir /Users/drgo/local/code/booker/rs/target/debug/deps -C incremental=/Users/drgo/local/code/booker/rs/target/debug/incremental -L dependency=/Users/drgo/local/code/booker/rs/target/debug/deps` (exit status: 1)

Meta

rustc --version --verbose:

ustc 1.78.0 (9b00956e5 2024-04-29) (Homebrew)
binary: rustc
commit-hash: 9b00956e56009bab2aa15d7bff10916599e3d6d6
commit-date: 2024-04-29
host: aarch64-apple-darwin
release: 1.78.0
LLVM version: 18.1.4

Backtrace

backtrace is not produced probably because of the crash

[DrGo]

Actually the compiler now crashes even when the -v is not provided with the following code

use std::path::{Path,PathBuf};
use std::{env,fs}; 

//TODO
// read src folder into a vec
// convert to typst
// compile to pdf

fn main() ->Result<(), AppError>{
    println!("Hello, world!");
    Ok(())
}

#[derive(Debug, Clone, PartialEq)]
struct File {
    path: PathBuf,
    content: String,
}

#[derive(Debug, Clone, PartialEq)]
struct Book {
    files: Vec<File>,
}

impl Book {
    fn load_book(Self, dir : AsRef<Path>) -> Result<(), Error> {
   }
}

the crashing stops and errors are reported as expected when I add `dyn' in the function definition

  fn load_book(Self, dir : dyn AsRef<Path>) -> Result<(), Error> {

[workingjubilee]

How... odd. If you are using rustc via Homebrew, please try installing the Rust toolchain via https://rustup.rs instead and letting us know if this replicates?

[DrGo]

Yes.. very odd,
I removed the Homebrew version and reinstalled using the rustup script.
Now the compiler crashes only if I add the -v option but does not report the cause of the crash

Caused by:
  process didn't exit successfully: `/Users/drgo/.rustup/toolchains/stable-aarch64-apple-darwin/bin/rustc --crate-name rst --edition=2021 src/main.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --diagnostic-width=98 --crate-type bin --emit=dep-info,link -C embed-bitcode=no -C debuginfo=2 -C split-debuginfo=unpacked -C metadata=972ad4c1b6c71082 -C extra-filename=-972ad4c1b6c71082 --out-dir /Users/drgo/local/code/booker/rs/target/debug/deps -C incremental=/Users/drgo/local/code/booker/rs/target/debug/incremental -L dependency=/Users/drgo/local/code/booker/rs/target/debug/deps` (exit status: 1)

rustc 1.78.0 (9b00956e5 2024-04-29)
binary: rustc
commit-hash: 9b00956e56009bab2aa15d7bff10916599e3d6d6
commit-date: 2024-04-29
host: aarch64-apple-darwin
release: 1.78.0
LLVM version: 18.1.2

[workingjubilee]

...that is incredibly fucky.

[workingjubilee]

And this reproduces with the nightly compiler too, right?

[workingjubilee]

Ah, I mean the one you can get by trying rustup default nightly.

[DrGo]

forgot to enable nightly..
yes, it occurs with nightly too. only with the -v option

rustc 1.80.0-nightly (b92758a9a 2024-05-20)
binary: rustc
commit-hash: b92758a9aef1cef7b79e2b72c3d8ba113e547f89
commit-date: 2024-05-20
host: aarch64-apple-darwin
release: 1.80.0-nightly
LLVM version: 18.1.6

[workingjubilee]

Huuuh, I can't get the "crash without -v" sample to repro.

For the other cases, I think this is just what Cargo does when you pass it -v. Normally it silences rustc failures which exit with 1, i.e. a "normal failure", but you asked it for verbose output, I guess?

[workingjubilee]

@DrGo As for why the code doesn't compile: you haven't defined the AppError type.