Make novel structural match violations a warning

ecstatic-morse · Jun 17, 2020 · c9dc73d · c9dc73d
1 parent e8ff4bc
commit c9dc73d
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/src/librustc_mir_build/hair/pattern/const_to_pat.rs b/src/librustc_mir_build/hair/pattern/const_to_pat.rs
@@ -107,8 +107,12 @@ impl<'a, 'tcx> ConstToPat<'a, 'tcx> {
                 cv.ty, structural
             );
 
+            // This can occur because const qualification treats all associated constants as
+            // opaque, whereas `search_for_structural_match_violation` tries to monomorphize them
+            // before it runs. See #73431 for an example.
             if structural.is_none() && mir_structural_match_violation {
-                bug!("MIR const-checker found novel structural match violation");
+                warn!("MIR const-checker found novel structural match violation");
+                return inlined_const_as_pat;
             }
 
             if let Some(non_sm_ty) = structural {