diff options
Diffstat (limited to 'compiler')
| -rw-r--r-- | compiler/rustc_span/src/hygiene.rs | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/compiler/rustc_span/src/hygiene.rs b/compiler/rustc_span/src/hygiene.rs index 37ec2f0801c..ab57d5c6803 100644 --- a/compiler/rustc_span/src/hygiene.rs +++ b/compiler/rustc_span/src/hygiene.rs @@ -1410,8 +1410,12 @@ pub fn decode_syntax_context<D: Decoder, F: FnOnce(&mut D, u32) -> SyntaxContext &mut hygiene_data.syntax_context_data[ctxt.as_u32() as usize], ctxt_data, ); - // Make sure nothing weird happening while `decode_data` was running if cfg!(not(parallel_compiler)) { + // Make sure nothing weird happened while `decode_data` was running. + // We used `kw::Empty` for the dummy value and we expect nothing to be + // modifying the dummy entry. + // This does not hold for the parallel compiler as another thread may + // have inserted the fully decoded data. assert_eq!(dummy.dollar_crate_name, kw::Empty); } }); |