Revert Dart_PropagateError until I can track down the problems in

runtime/vm/unit_test.cc

Index: runtime/vm/unit_test.cc
===================================================================
--- runtime/vm/unit_test.cc	(revision 3821)
+++ runtime/vm/unit_test.cc	(working copy)
@@ -186,18 +186,38 @@
 
 bool CompilerTest::TestCompileScript(const Library& library,
                                      const Script& script) {
+  bool retval;
   Isolate* isolate = Isolate::Current();
   ASSERT(isolate != NULL);
-  const Error& error = Error::Handle(Compiler::Compile(library, script));
-  return error.IsNull();
+  LongJump* base = isolate->long_jump_base();
+  LongJump jump;
+  isolate->set_long_jump_base(&jump);
+  if (setjmp(*jump.Set()) == 0) {
+    Compiler::Compile(library, script);
+    retval = true;
+  } else {
+    retval = false;
+  }
+  isolate->set_long_jump_base(base);
+  return retval;
 }
 
 
 bool CompilerTest::TestCompileFunction(const Function& function) {
+  bool retval;
   Isolate* isolate = Isolate::Current();
   ASSERT(isolate != NULL);
-  const Error& error = Error::Handle(Compiler::CompileFunction(function));
-  return error.IsNull();
+  LongJump* base = isolate->long_jump_base();
+  LongJump jump;
+  isolate->set_long_jump_base(&jump);
+  if (setjmp(*jump.Set()) == 0) {
+    Compiler::CompileFunction(function);
+    retval = true;
+  } else {
+    retval = false;
+  }
+  isolate->set_long_jump_base(base);
+  return retval;
 }
 
 }  // namespace dart