Remove cancel and make crash exit with code 253.

sdk/lib/_internal/compiler/implementation/closure.dart

Index: sdk/lib/_internal/compiler/implementation/closure.dart
diff --git a/sdk/lib/_internal/compiler/implementation/closure.dart b/sdk/lib/_internal/compiler/implementation/closure.dart
index 76de97ae4fb7d96f2a88f00cbb33633b3f13be4f..7b1f02d7ec3417e3bcb7904fc9c57577d0a84177 100644
--- a/sdk/lib/_internal/compiler/implementation/closure.dart
+++ b/sdk/lib/_internal/compiler/implementation/closure.dart
@@ -67,7 +67,7 @@ class ClosureTask extends CompilerTask {
     return measure(() {
       ClosureClassMap nestedClosureData = closureMappingCache[node];
       if (nestedClosureData == null) {
-        compiler.internalError("No closure cache", node: node);
+        compiler.internalError(node, "No closure cache.");
       }
       return nestedClosureData;
     });
@@ -799,7 +799,7 @@ class ClosureTranslator extends Visitor {
     for (Element freeElement in freeVariables) {
       if (capturedVariableMapping[freeElement] != null &&
           capturedVariableMapping[freeElement] != freeElement) {
-        compiler.internalError('In closure analyzer', node: node);
+        compiler.internalError(node, 'In closure analyzer.');
       }
       capturedVariableMapping[freeElement] = freeElement;
       useLocal(freeElement);