More info when unpickling fails

Author: odersky

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)

compiler/test/dotc/tests.scala

@@ -50,7 +50,7 @@ class tests extends CompilerTest {
             |Where these all contain locations, except extras which is a comma
             |separated list of jars.
             |
-            |When compiling with eclipse, you need the sbt-interfaces jar, but
+            |When compiling with eclipse, you need the sbt-interfaces jar, put
             |it in extras."""
       )
       file.getAbsolutePath
@@ -349,10 +349,6 @@ class tests extends CompilerTest {
   @Test def tasty_tests = compileDir(testsDir, "tasty", testPickling)
 
   @Test def tasty_bootstrap = {
-    val f = new JFile(getClass.getProtectionDomain.getCodeSource.getLocation.getPath)
-    println(f)
-    println(System.getProperty("java.class.path"))
-
     val opt = List("-priorityclasspath", defaultOutputDir, "-Ylog-classpath")
     // first compile dotty
     compileDir(dottyDir, ".", List("-deep", "-Ycheck-reentrant", "-strict"))(allowDeepSubtypes)