diff options
Diffstat (limited to 'src/librustc/ich/impls_syntax.rs')
| -rw-r--r-- | src/librustc/ich/impls_syntax.rs | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/src/librustc/ich/impls_syntax.rs b/src/librustc/ich/impls_syntax.rs index a75527c14bd..4e3caca2b61 100644 --- a/src/librustc/ich/impls_syntax.rs +++ b/src/librustc/ich/impls_syntax.rs @@ -169,6 +169,11 @@ impl<'a, 'gcx, 'tcx> HashStable<StableHashingContext<'a, 'gcx, 'tcx>> for [ast:: fn hash_stable<W: StableHasherResult>(&self, hcx: &mut StableHashingContext<'a, 'gcx, 'tcx>, hasher: &mut StableHasher<W>) { + if self.len() == 0 { + self.len().hash_stable(hcx, hasher); + return + } + // Some attributes are always ignored during hashing. let filtered: AccumulateVec<[&ast::Attribute; 8]> = self .iter() |