bug#17642: pre-command-hook has thousands of `clear-transient-map' in 24.3.91.1

[Thierry Volpiatto]

Stefan Monnier <monnier@iro.umontreal.ca> writes:

>> I'm not sure if it's related to what I'm seeing.  If I remove all
>> `clear-transient-map'  from my pre-command-hook, they come back in
>> quick order.
>
> That's weird.  Do you see any strange message in *Messages*?

Helm is using `set-transient-map' a lot and it seems `set-transient-map'
doesn't remove properly its `clearfun' from `pre-command-hook' or more
exactly the `clearfun' doesn't remove itself from `pre-command-hook'.
So the many entries found in `pre-command-hook' may come from this.

BTW `set-transient-map' description in info is not accorded to its
docstring.

-- 
Thierry
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