- Remove trailing '\n' when getting the API error message.

runtime/vm/dart_api_impl.cc

 // Copyright (c) 2012, 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.
 
 #include "include/dart_api.h"
 
 #include "vm/bigint_operations.h"
 #include "vm/class_finalizer.h"
 #include "vm/compiler.h"
 #include "vm/dart.h"
@@ skipping 280 matching lines @@
   Isolate* isolate = Isolate::Current();
   DARTSCOPE(isolate);
   const Object& obj = Object::Handle(isolate, Api::UnwrapHandle(handle));
   if (obj.IsError()) {
     Error& error = Error::Handle(isolate);
     error ^= obj.raw();
     const char* str = error.ToErrorCString();
     intptr_t len = strlen(str) + 1;
     char* str_copy = reinterpret_cast<char*>(Api::Allocate(isolate, len));
     strncpy(str_copy, str, len);
+    // Strip a possible trailing '\n'.
+    if ((len > 1) && (str_copy[len - 2] == '\n')) {
+      str_copy[len - 2] = '\0';
+    }
     return str_copy;
   } else {
     return "";
   }
 }
 
 
 DART_EXPORT bool Dart_ErrorHasException(Dart_Handle handle) {
   Isolate* isolate = Isolate::Current();
   DARTSCOPE(isolate);
@@ skipping 3321 matching lines @@
     *buffer_size = 0;
   }
 }
 
 
 DART_EXPORT void Dart_InitFlowGraphPrinting(FileWriterFunction function) {
   Dart::set_flow_graph_writer(function);
 }
 
 }  // namespace dart