[Vm-dev] [Pharo-dev] Sign of Impending Iceberg Doom on Pharo 6.1

[Ben Coman]

On Sat, 25 Aug 2018 at 01:40, Eliot Miranda <eliot.miranda at gmail.com> wrote:

>
> Hi Sean,
> On Fri, Aug 24, 2018 at 10:03 AM Sean P. DeNigris <sean at clipperadams.com>
> wrote:
>
>> Sometimes while working in Iceberg on 6.1, I see a progress bar(s) like
>> the
>> following:
>> <http://forum.world.st/file/t128965/Screenshot_2018-08-24_12.jpeg>
>>
>> This seems to usually signal that a crash is not far away.
>
>
Do you mean seconds or minutes or more away from a crash?



> It's doubly concerning because there is no clear way to stop the troubled
>> process
>> (interrupts often bring up a debugger on something else) and because,
>> since
>> one is now unable to save any code, it's unclear how to start over easily
>> in
>> a new image.
>
>
Just some general ideas (you may have already considered)

The string "Diffing..." appears in only one location in
MCPatch>>initializeWithBase:target:
I'm not clear on the behaviour of  #on:displayProgress:  whether its
possible some inside loop
can make that string appear multiple times, or whether it indicates
#initializeWithBase:target:
is being called multiple times.

A specific check there for an escape key-combo might help debug this.
Or a class variable reset from Iceberg that halts when it exceeds a limit
on the number of loops.
Or log to file five or so levels of "thisContext senders senders etc"  for
post crash analysis to help isolate the loop.

cheers -ben


P.S. While I was browsing senders-of-senders-of-senders I quickly got lost
and wondered
if a tool that graphically showed a senders-tree might be a useful demo for
Diagrammer.

>
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