Recently while using addr2line for gRPC code I saw that it is not producing line number. The man page of add2line states that line number will be 0 if it can't determine.
$ addr2line -s -C -i -f -e mybin 0x85fbc2 0x7f9eacbcf330 0x7f9eacbcb402 0x7f9eaac826fc 0xa5f861 0x80862f
afunc
mymain.cpp:150
??
??:0
??
??:0
??
??:0
grpc::Server::Wait()
??:? <--- Problem
RunServer(void*)
server_grpc.cpp:94
What could be the reason for that ? for the line number ?
