diff options
Diffstat (limited to 'src/libsyntax')
| -rw-r--r-- | src/libsyntax/feature_gate.rs | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/src/libsyntax/feature_gate.rs b/src/libsyntax/feature_gate.rs index 2478ed169cd..66c66ad8940 100644 --- a/src/libsyntax/feature_gate.rs +++ b/src/libsyntax/feature_gate.rs @@ -896,9 +896,10 @@ fn find_lang_feature_issue(feature: &str) -> Option<u32> { issue } else { // search in Accepted or Removed features - ACCEPTED_FEATURES.iter().chain(REMOVED_FEATURES.iter()) - .find(|t| t.0 == feature) - .unwrap().2 + match ACCEPTED_FEATURES.iter().chain(REMOVED_FEATURES).find(|t| t.0 == feature) { + Some(&(_, _, issue)) => issue, + None => panic!("Feature `{}` is not declared anywhere", feature), + } } } |