Recover from TypeErrors in isErroneous

Fixes scala#15283 (hopefully)
dotty-staging · Jun 14, 2022 · 5c3ef81 · 5c3ef81
1 parent 836ed97
commit 5c3ef81
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/compiler/src/dotty/tools/dotc/core/Types.scala b/compiler/src/dotty/tools/dotc/core/Types.scala
@@ -353,7 +353,8 @@ object Types {
      *
      */
     def isErroneous(using Context): Boolean =
-      widen.existsPart(_.isError, forceLazy = false)
+      try widen.existsPart(_.isError, forceLazy = false)
+      catch case ex: TypeError => true
 
     /** Is this type unusable for implicit search or overloading resolution
      *  since it has embedded errors that can match anything? This is weaker and more