heap bins doesn't properly handle when main_arena is missing

[Grazfather]

Although you have the prints that suggest that it should be caught "No main_arena...", the exception that is thrown from GlibcArena.__init__ is not caught.

Also note that all but the fastbins command print the title before checking, not after.

gef> heap bins fast
Python Exception <class 'gdb.error'> No symbol "main_arena" in current context.:
Error occurred in Python command: No symbol "main_arena" in current context.
gef> heap bins unsorted
---------------------------------------[ Information on Unsorted Bin of arena 'main_arena' ]---------------------------------------
Python Exception <class 'gdb.error'> No symbol "main_arena" in current context.:
Error occurred in Python command: No symbol "main_arena" in current context.
gef> heap bins small
----------------------------------------[ Information on Small Bins of arena 'main_arena' ]----------------------------------------
Python Exception <class 'gdb.error'> No symbol "main_arena" in current context.:
Error occurred in Python command: No symbol "main_arena" in current context.
gef> heap bins large
----------------------------------------[ Information on Large Bins of arena 'main_arena' ]----------------------------------------
Python Exception <class 'gdb.error'> No symbol "main_arena" in current context.:
Error occurred in Python command: No symbol "main_arena" in current context.

[hugsy]

Erf.... 😭

[Grazfather]

Welcome back from vacation! 😂

[hugsy]

On Wed, Oct 26, 2016 at 10:36:13AM -0700, Grazfather wrote:

Welcome back from vacation! 😂

Not just yet, but soon :'(
This time off gave me a ton of new ideas for gef :)

hugsy

"Computer science is no more about computers than astronomy is about telescopes." - E. Dijkstra

[Grazfather]

Is this fixed?

[hugsy]

It should, did you get a chance to try?

[Grazfather]

If i was smarter i would have written down or saved the file that had this issue. I'll repro it tonight though.

[Grazfather]

lgtm