[Bug 1547466] Re: grep switches into binary mode while processing a text file

[Martin Pitt]

Ah, thanks for pointing out. I understood it as the changes in grep 2.23
were deliberate, and during xenial this caused quite a lot of fallout
which we fixed.

Reverting the behavior for C makes sense. Thus now we still need to find
the actual fix in gnulib. Applying the doc and test to grep itself is
still worthwhile though and should absolutely be part of the SRU.

** Also affects: grep (Ubuntu Xenial)
   Importance: Undecided
       Status: New

** Also affects: grep (Ubuntu Yakkety)
   Importance: High
     Assignee: Martin Pitt (pitti)
       Status: Confirmed

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Title:
  grep switches into binary mode while processing a text file

Status in grep package in Ubuntu:
  Confirmed
Status in grep source package in Xenial:
  New
Status in grep source package in Yakkety:
  Confirmed

Bug description:
  I noticed this staring to happen in Xenial about two days ago. When
  running sbuild (or now the buildd, too), the build breaks when trying
  to compile a generated file. I traced the problem down to grep
  suddenly acting weird. When not having any language set (or a non-UTF8
  mode) it will start printing some lines of a source file and then
  suddenly end that by printing "Binary file ... matches".

  With the attached file, the difference can be observed (running
  Xenial):

  LANG=C grep -v xxx grant_table.h

  and

  LANG=C.UTF-8 grep -v xxx grant_table.h

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