Extrainfo descriptor transport lines fail validation
Oops! Transport lines effectviely never appear aside from raw bridge descriptors (which we never see), so I didn't have a live example to test with.
Now we have one. DocTor's descriptor validation check is failing with...
03/05/2020 00:35:33 [WARNING] Unable to retrieve the extrainfo descriptors: Transport line has a malformed address: transport obfs4 [2001:985:e77:5:fd34:f56b:c2d1:e98c]:10394 cert=dJ/a+vnP+eFv7FDaVUqWCVlyrqf8FlOva2YAEkDUwiGQuorZf4Oc6FXSdyn8b4pUmZj/WA,iat-mode=0
Caught thanks to GeKo.