Fix --hydrogen-filter="-".

src/objects.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 9886 matching lines @@
 //   "-"      all but the top-level function
 //   "-name"  all but the function "name"
 //   ""       only the top-level function
 //   "name"   only the function "name"
 //   "name*"  only functions starting with "name"
 bool JSFunction::PassesFilter(const char* raw_filter) {
   if (*raw_filter == '*') return true;
   String* name = shared()->DebugName();
   Vector<const char> filter = CStrVector(raw_filter);
   if (filter.length() == 0) return name->length() == 0;
-  if (filter[0] != '-' && name->IsUtf8EqualTo(filter)) return true;
-  if (filter[0] == '-' &&
-      !name->IsUtf8EqualTo(filter.SubVector(1, filter.length()))) {
+  if (filter[0] == '-') {
+    if (filter.length() == 1) {
+      return (name->length() != 0);
+    } else if (!name->IsUtf8EqualTo(filter.SubVector(1, filter.length()))) {
+      return true;
+    }
+  } else if (name->IsUtf8EqualTo(filter)) {
     return true;
   }
   if (filter[filter.length() - 1] == '*' &&
       name->IsUtf8EqualTo(filter.SubVector(0, filter.length() - 1), true)) {
     return true;
   }
   return false;
 }
 
 
@@ skipping 6478 matching lines @@
 #define ERROR_MESSAGES_TEXTS(C, T) T,
   static const char* error_messages_[] = {
       ERROR_MESSAGES_LIST(ERROR_MESSAGES_TEXTS)
   };
 #undef ERROR_MESSAGES_TEXTS
   return error_messages_[reason];
 }
 
 
 } }  // namespace v8::internal