Add failsafe for a case where prefixes in CheckUnused/prepareIndent f…

…ormed an infinite cycle
scala · Mar 13, 2023 · cd36837 · cd36837
1 parent 247b2c7
commit cd36837
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/compiler/src/dotty/tools/dotc/transform/CheckUnused.scala b/compiler/src/dotty/tools/dotc/transform/CheckUnused.scala
@@ -78,6 +78,7 @@ class CheckUnused extends MiniPhase:
   override def prepareForIdent(tree: tpd.Ident)(using Context): Context =
     if tree.symbol.exists then
       val prefixes = LazyList.iterate(tree.typeOpt.normalizedPrefix)(_.normalizedPrefix).takeWhile(_ != NoType)
+        .take(10) // Failsafe in the odd case if there were an infinite cycle
       for {
         prefix <- prefixes
       } {