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Description
Reproducer:
macro mac($expr:expr) {
print_bang!($expr);
}
fn main() {
mac!(#[allow(warnings)] 0);
}
where print_bang
is a proc macro from https://github.com/rust-lang/rust/blob/master/src/test/ui/proc-macro/auxiliary/test-macros.rs
The result looks like this:
PRINT-BANG INPUT (DISPLAY): #[allow(warnings)] 0
PRINT-BANG RE-COLLECTED (DISPLAY): #[allow(warnings)] #[allow(warnings)] 0
The issue can be reproduced after merging #84995, before that PR the example ICEs.
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Area: Attributes (`#[…]`, `#![…]`)Area: Attributes (`#[…]`, `#![…]`)Area: All kinds of macros (custom derive, macro_rules!, proc macros, ..)Area: All kinds of macros (custom derive, macro_rules!, proc macros, ..)Category: This is a bug.Category: This is a bug.