D19108: [ExternalExtractor] Provide more helpful output when extractor fails

[Stefan Brüns]

bruns marked an inline comment as done.
bruns added inline comments.

INLINE COMMENTS

> lbeltrame wrote in externalextractor.cpp:120
> Will this block anything?

At most 3 seconds (non gui task), also see the waitforfinished below ...

REPOSITORY
  R286 KFileMetaData

REVISION DETAIL
  https://phabricator.kde.org/D19108

To: bruns, #baloo, #frameworks, ngraham, poboiko, astippich, lbeltrame
Cc: lbeltrame, kde-frameworks-devel, ashaposhnikov, michaelh, astippich, spoorun, ngraham, bruns, abrahams
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