compiler/rustc_error_codes/src/error_codes/E0660.md

   1 The argument to the `llvm_asm` macro is not well-formed.
   2
   3 Erroneous code example:
   4
   5 ```compile_fail,E0660
   6 llvm_asm!("nop" "nop");
   7 ```
   8
   9 Considering that this would be a long explanation, we instead recommend you
  10 take a look at the [`llvm_asm`] chapter of the Unstable book:
  11
  12 [`llvm_asm`]: https://doc.rust-lang.org/stable/unstable-book/library-features/llvm-asm.html