Is there a reason why gc+promotion log lines are missing the GC id?

[54.898s][info][gc,start ] GC(18) Pause Young (Allocation Failure)
[57.272s][info][gc,promotion ] Promotion failed
[57.272s][info][gc,heap ] GC(18) PSYoungGen: 3522688K->3522688K(4032000K)

The fix seems very straightforward, just add:

LOG_PREFIX(GCId::print_prefix, LOG_TAGS(gc, promotion))

to the LOG_PREFIX_LIST in logging/logPrefix.hpp. With the fix:

[60.220s][info][gc,start ] GC(18) Pause Young (Allocation Failure)
[62.529s][info][gc,promotion ] GC(18) Promotion failed
[62.529s][info][gc,heap ] GC(18) PSYoungGen: 3522752K->3522752K(4032000K)