Re: Don't error out when variable not available

[Andreas Schwab <schwab@suse.de>]

Andrew Cagney <cagney@gnu.org> writes:

> Adding more special case code, as was done with your other patch, isn't
> the way to go.

There is really no reason to call error in loclist_read_variable when we
can return VALUE_OPTIMIZED_OUT, like we already to in
dwarf2_evaluate_loc_desc.  Fixing that problem is orthogonal to the
general problem of not catching errors.  That print_frame_args needs to
check for VALUE_OPTIMIZED_OUT is only because it calls val_print directly
without going through value_print.  It already has to take care of NULL
value even though value_print would handle that as well.  Sooner or later
it would probably have been required to add this case anyway.

Andreas.

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Andreas Schwab, SuSE Labs, schwab@suse.de
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