I've installed gdb formulae from Homebrew on OSX 10.10.5 to send a backtrace to developers of weechat (because weechat installed with Homebrew crashes every time I do /exit).
And got this problem when trying to read the core file:
gdb /usr/local/bin/weechat /cores/core.70087
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Reading symbols from /usr/local/bin/weechat...(no debugging symbols found)...done.
"/cores/core.70087": no core file handler recognizes format
(gdb)
I've tried to do this with with lldb instead of gdb:
$ lldb /usr/local/bin/weechat /cores/core.70087
(lldb) target create "/usr/local/bin/weechat"
Current executable set to '/usr/local/bin/weechat' (x86_64).
(lldb) settings set -- target.run-args "/cores/core.70087"
(lldb) bt full
error: bt [<digit>|all]
(lldb) bt all
error: invalid process
(lldb) bt
error: invalid process
(lldb) thread backtrace
error: invalid process
(lldb)
Have no idea what am I doing, just trying to do whatever I can to address these crashes.
You should be able to launch lldb as
$ lldb --core "/cores/core.70087"