ICE if `fn main()` is `#[no_mangle]`-ed

[liigo]

#[no_mangle]
fn main() {
    println!("hello world");
}

when rustc hello.rs, rustc panicked:

rustc: /home/liigo/rust/rust/src/llvm/include/llvm/Support/Casting.h:237: typename llvm::cast_retty<X, Y*>::ret_type llvm::cast(Y*) [with X = llvm::Function; Y = llvm::Value; typename llvm::cast_retty<X, Y*>::ret_type = llvm::Function*]: Assertion `isa<X>(Val) && "cast<Ty>() argument of incompatible type!"' failed.
[1]    4419 abort      rustc hello.rs

[nagisa]

This now results in

test.rs:3:1: 5:2 error: entry symbol `main` defined multiple times
test.rs:3 fn main() {
test.rs:4     println!("hello world");
test.rs:5 }
help: did you use #[no_mangle] on `fn main`? Use #[start] instead
error: aborting due to previous error

So this can be closed.