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"RPC dissector bug" response when examining an "unknown" RPC program

Note: this worked before 4.4.0...

I am looking at a simple trace of a ClearCase operation, which involves communicating with the ClearCase albd server and another ClearCase server process on the same host. (The "credmap server" process, with RPC program number 390521)

When I have "Preferences/Protocols/RPC/Attempt to decode Unknown RPC's" enabled, I get a message in the trace reading: [Dissector bug, protocol RPC: C:\gitlab-builds\builds\MsQ3pox2\0\wireshark\wireshark\epan\proto.c:4373: failed assertion "hfindex > 0 && (unsigned)hfindex < gpa_hfinfo.len" (Unregistered hf!)]

Any ideas? It's not critical since All I really care about is the program, version, procedure and whether it sent a good reply... But having EVERY RPC blurting that error is frustrating.