rustc hangs on a recursive function marked with #[inline] #100476
Description
I tried this code with -Copt-level=3 --crate-type=lib (Playground, Godbolt; minimized and modified from r3_core's failing code):
#![feature(decl_macro)] macro emit($($m:ident)*) {$( // Randomize `def_path_hash` by defining them under a module with // different names pub mod $m { pub trait Tr { type Next: Tr; } pub fn hoge<const N: usize, T: Tr>() { inner::<N, T>(); } #[inline(always)] fn inner<const N: usize, T: Tr>() { inner::<N, T::Next>(); } } )*} // Increase the chance of triggering the bug emit!( m00 m01 m02 m03 m04 m05 m06 m07 m08 m09 m10 m11 m12 m13 m14 m15 m16 m17 m18 m19 );I expected to see this happen: Successful compilation
Instead, this happened: Compiler hangup
Meta
rustc --version --verbose:
rustc 1.64.0-nightly (f8588549c 2022-07-18) binary: rustc commit-hash: f8588549c3c3d45c32b404210cada01e2a45def3 commit-date: 2022-07-18 host: aarch64-apple-darwin release: 1.64.0-nightly LLVM version: 14.0.6