More info when unpickling fails

odersky · odersky · commit 781fb87443f6 · 2016-11-23T19:04:55.000+01:00
diff --git a/compiler/src/dotty/tools/dotc/core/tasty/TreeUnpickler.scala b/compiler/src/dotty/tools/dotc/core/tasty/TreeUnpickler.scala
@@ -555,8 +555,8 @@ class TreeUnpickler(reader: TastyReader, tastyName: TastyName.Table, posUnpickle
             val tp = readType()
             val lazyAnnotTree = readLater(end, rdr => ctx => rdr.readTerm()(ctx))
             annots += Annotation.deferredSymAndTree(tp.typeSymbol, _ => lazyAnnotTree.complete)
-          case _ =>
-            assert(false, s"illegal modifier tag at $currentAddr")
+          case tag =>
+            assert(false, s"illegal modifier tag $tag at $currentAddr, end = $end")
         }
       }
       (flags, annots.toList, privateWithin)

Original file line number	Diff line number	Diff line change
`@@ -555,8 +555,8 @@ class TreeUnpickler(reader: TastyReader, tastyName: TastyName.Table, posUnpickle`
`555`	`555`	`val tp = readType()`
`556`	`556`	`val lazyAnnotTree = readLater(end, rdr => ctx => rdr.readTerm()(ctx))`
`557`	`557`	`annots += Annotation.deferredSymAndTree(tp.typeSymbol, _ => lazyAnnotTree.complete)`
`558`		`- case _ =>`
`559`		`- assert(false, s"illegal modifier tag at $currentAddr")`
	`558`	`+ case tag =>`
	`559`	`+ assert(false, s"illegal modifier tag $tag at $currentAddr, end = $end")`
`560`	`560`	`}`
`561`	`561`	`}`
`562`	`562`	`(flags, annots.toList, privateWithin)`