error in process filter: Error 70

[Xavier Maillard]

Hello,

I made a simple search in the *mu4e-main* buffer via 's'.
Then I entered the result buffer and marked all items (M-h) then '!'.

Quitting the buffer resulted in many 'error in process filter' and I
do not know why and what I can do to prevent that.

Is this a serious error or not ? What's the impact ?

Version: mu4e/0.9.11 Emacs/24.3.1 (gnu/linux)

Thank you
-- Xavier.