failure to parse weak maps line in GC log

[amccreight]

bkelly got this, I think from a win64 GC log:

Parsing gc-edges.9092.1464365140.log. Error: unknown line WeakMapEntry map=00000218C5CBE0C0 key=0000021896D58DF0 keyDelegate=0000000000000000 value=00000218AA005BC0

[amccreight]

The regexp for weak map lines does not end in ([^\r\n]*)\r?$ but just \r? so maybe that's the issue.