`asm!("asdflol" "nop");` compiles

[jonasschneider]

It looks like the implicit concatenation syntax (like in GCC) isn't supported by rustc or maybe LLVM.
In this case, the compiler should error. (Maybe this is just a problem with the asm! macro? If it is even a macro?)

Full example: on x86_64-linux run rustc hello.rs, hello.rs:

#![feature(asm)]
fn main() {
  unsafe { asm!("asdflol" "nop"); }
}

Expected behaviour: compiler error about invalid instruction "asdflolnop", or compiler error about "invalid asm concat syntax, please give a single string"
Actual behaviour: compiles to just a NOP (afaics)

[nagisa]

Intrested in taking this.