Retrieving some context from Fortran runtime errors

[Dennis Wassel]

2008/9/12 Alberto Luaces <aluaces@udc.es>:
> Hello,
>
> I have a C++ program that uses a library written in Fortran. Currently the
> program stops with this message:
>
> Fortran runtime error: Attempt to DEALLOCATE unallocated memory.
>
> However, as it doesn't segfaults nor dumps core, I cannot find which
> DEALLOCATE is the culprit. How could I find it?
>
> gfortran gcc version 4.3.1 (Debian 4.3.1-9)
>
> Thanks,
>
> Alberto
>

This solution worked for me; it requires you to have the Fortran
library available as source, though.

Compile (at least) the library with -g, then run the executable in gdb
and set a breakpoint at '_gfortran_runtime_error'. gdb will stop at
the "Fortran runtime error" somewhere inside libgfortran, but you can
backtrace your way into your code from there to find the offending
DEALLOCATE.

Cheers,
Dennis