Hi,

I saw there GDB will naively loop and crash on DW_OP_fbreg contained in the
location list of DW_AT_frame_base.

I am not aware of an existing case using such broken debug info.

dwarf_expr_context->recursion_depth and dwarf_expr_context->max_recursion_depth
are declared but never used in the GDB sources.  IMO MAX_RECURSION_DEPTH could
be a constant but I left the code according to the existing declaration.

No regressions on x86_64.


Regards,
Jan