attempting to catch other unexpected errors

Author: soronpo

compiler/src/dotty/tools/dotc/ast/Desugar.scala

@@ -321,9 +321,11 @@ object desugar {
       val preciseMap : Map[TypeName, Boolean] = ignoreErrorsAndRun {
         meth.leadingTypeParams.map(t =>
           (t.name, t.mods.annotations.exists {a =>
-            val typedAnnot = ctx.typer.typedExpr(a)
-            if (typedAnnot.denot == NoDenotation) false
-            else typedAnnot.symbol.owner == defn.PreciseAnnot
+            try
+              val typedAnnot = ctx.typer.typedExpr(a)
+              if (typedAnnot.denot == NoDenotation) false
+              else typedAnnot.symbol.owner == defn.PreciseAnnot
+            catch case e: Throwable => false
           })
         ).toMap
       }