If a rethrow is encountered in the catch block, then its handler must be marked that it needs stack…

tests/language/stack_trace_test.dart

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 // Dart test program for testing throw statement
 
 import "package:expect/expect.dart";
 
 class MyException {
   const MyException(String message) : message_ = message;
   final String message_;
@@ skipping 65 matching lines @@
   }
 
 }
 
 class StackTraceTest {
   static testMain() {
     Expect.equals(850, Helper.f1(1));
   }
 }
 
+
+// Test that the full stack trace is generated for rethrow.
+class RethrowStacktraceTest {
+  var config = 0;
+
+  issue12940() {
+    throw "Progy";
+  }
+
+  b() {
+    issue12940();
+  }
+
+  c() {
+    if (config == 0) {
+      try {
+        b();
+      } catch (e) {
+        rethrow;
+      }
+    } else {
+      try {
+        b();
+      } catch (e, s) {
+        rethrow;
+      }
+    }
+  }
+
+  d() {
+    c();
+  }
+
+  testBoth() {
+    for (config = 0; config < 2; config++) {
+      try {
+        d();
+      } catch (e, s) {
+        Expect.isTrue(s.toString().contains("issue12940"));
+      }
+    }
+  }
+
+  static testMain() {
+    var test = new RethrowStacktraceTest();
+    test.testBoth();
+  }
+}
+
+
 main() {
   StackTraceTest.testMain();
+  RethrowStacktraceTest.testMain();
 }