Does adding the executable pathname to the `gdb` command line (i.e.,
format `gdb EXECUTABLE-FILE CORE-FILE`) give you the symbols?
If that doesn't give you symbols, you can check the symbol info of your
Racket debug build by running (without the core file) briefly under
`gdb`. If I had to guess, I'd say that probably your debug build is
fine, and that, in your core file, probably a memory problem didn't
corrupt your C stack. To guess further beyond that point, I'd first
look at what relatively problematic things the application code is
doing. (A GC patch by rtm is good to mentally file away in case more
likely sources of problem are exhausted, but that's not the first place
I'd look for a problem.)
Neil V.
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