i686 musl cannot panic

[alexcrichton]

e.g. for a simple program like:

fn main() {
   panic!("hello");
}

it runs as:

$ rustc foo.rs --target i686-unknown-linux-musl && ./foo
thread 'main' panicked at 'hello', foo.rs:2
note: Run with `RUST_BACKTRACE=1` for a backtrace.
fatal runtime error: failed to initiate panic, error 5
zsh: abort (core dumped)  ./foo

cc @japaric

[japaric]

duplicate of #35599

It's catch_unwind what doesn't work (start uses catch_unwind to catch any panic that may occur in main)

[alexcrichton]

Indeed!