Use failedAt in more places

pkg/compiler/lib/src/inferrer/inferrer_engine.dart

Index: pkg/compiler/lib/src/inferrer/inferrer_engine.dart
diff --git a/pkg/compiler/lib/src/inferrer/inferrer_engine.dart b/pkg/compiler/lib/src/inferrer/inferrer_engine.dart
index 0f7d85cda5714dad727e470aab55b16a3e891d34..c47c63c97690c98f9d7312a9e3f10706dfe13d85 100644
--- a/pkg/compiler/lib/src/inferrer/inferrer_engine.dart
+++ b/pkg/compiler/lib/src/inferrer/inferrer_engine.dart
@@ -583,7 +583,7 @@ class InferrerEngineImpl extends InferrerEngine {
         trace(<FunctionEntity>[info.member],
             new StaticTearOffClosureTracerVisitor(info.member, info, this));
       } else if (info is ParameterTypeInformation) {
-        throw new SpannableAssertionFailure(
+        failedAt(
             NO_LOCATION_SPANNABLE, 'Unexpected closure allocation info $info');
       }
     });