Static rustc_lint::builtin::BINARY_ASM_LABELS

source · 
pub static BINARY_ASM_LABELS: &Lint
Expand description

The binary_asm_labels lint detects the use of numeric labels containing only binary digits in the inline asm! macro.

§Example

ⓘ
use std::arch::asm;

fn main() {
    unsafe {
        asm!("0: jmp 0b");
    }
}

{{produces}}

§Explanation

A LLVM bug causes this code to fail to compile because it interprets the 0b as a binary literal instead of a reference to the previous local label 0. Note that even though the bug is marked as fixed, it only fixes a specific usage of intel syntax within standalone files, not inline assembly. To work around this bug, don’t use labels that could be confused with a binary literal.

See the explanation in Rust By Example for more details.