Improve failure diagnostic

scala · Aug 12, 2019 · 6a22d29 · 6a22d29
1 parent e46d9ab
commit 6a22d29
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/compiler/src/dotty/tools/backend/sjs/JSCodeGen.scala b/compiler/src/dotty/tools/backend/sjs/JSCodeGen.scala
@@ -404,7 +404,10 @@ class JSCodeGen()(implicit ctx: Context) {
         case EmptyTree  => ()
         case dd: DefDef => generatedMethods ++= genMethod(dd)
         case _ =>
-          throw new FatalError("Illegal tree in gen of genInterface(): " + tree)
+          throw new FatalError(
+            i"""Illegal tree in gen of genInterface(): $tree
+               |class = $td
+               |in ${ctx.compilationUnit}""")
       }
     }