- Do not limit the compiler message buffer, by allocating the message

vm/parser.h

Index: vm/parser.h
===================================================================
--- vm/parser.h	(revision 12163)
+++ vm/parser.h	(working copy)
@@ -243,15 +243,12 @@
     Function& constructor,
     const AbstractTypeArguments& type_arguments);
 
-  // Format an error or warning message into the message_buffer.
   // A null script means no source and a negative token_pos means no position.
-  static void FormatMessage(const Script& script,
-                            intptr_t token_pos,
-                            const char* message_header,
-                            char* message_buffer,
-                            intptr_t message_buffer_size,
-                            const char* format,
-                            va_list args);
+  static RawString* FormatMessage(const Script& script,
+                                  intptr_t token_pos,
+                                  const char* message_header,
+                                  const char* format,
+                                  va_list args);
 
   // Reports error/warning message at location of current token.
   void ErrorMsg(const char* msg, ...) PRINTF_ATTRIBUTE(2, 3);