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Re: buildbot is green!

On Tue, 8 Sep 2015, Carlos O'Donell wrote:

> LC_ALL=C readelf -W -d /mnt/b/glibc-ubuntu-trusty-slave2/glibc-i686-linux/build/build/rt/ > /mnt/b/glibc-ubuntu-trusty-slave2/glibc-i686-linux/build/build/rt/
> test -s /mnt/b/glibc-ubuntu-trusty-slave2/glibc-i686-linux/build/build/rt/
> mv -f /mnt/b/glibc-ubuntu-trusty-slave2/glibc-i686-linux/build/build/rt/ /mnt/b/glibc-ubuntu-trusty-slave2/glibc-i686-linux/build/build/rt/
> make[1]: *** [tests] Error 1
> make[1]: Target `check' not remade because of errors.
> make[1]: Leaving directory `/mnt/b/glibc-ubuntu-trusty-slave2/glibc-i686-linux/build/glibc'
> make: *** [check] Error 2
> make: Leaving directory `/mnt/b/glibc-ubuntu-trusty-slave2/glibc-i686-linux/build/build'
> Which is elf/Makefile:
>  945 $(all-built-dso:=.dyn): %.dyn: %
>  946         @rm -f $@T
>  947         LC_ALL=C $(READELF) -W -d $< > $@T
>  948         test -s $@T
>  949         mv -f $@T $@
> It looks like PARALLELMFLAGS is "" so this is -j1 output, my own logs
> show interleaved output (I normally run -j4 or higher).
> Therefore the failure was in the `mv`?

If the failure was in the mv I'd expect

make[1]: *** [] Error 1

or similar, along with an error message from mv.  An error from [tests] 
with no previous such message would suggest an error in one of the 
commands for "tests".  Except that doesn't make sense based on the log 
shown (and none of those commands use @ to disable showing the command).

> Which is odd, unless it's the sequence of >, test, and mv that cause an fs-level
> failure. We could run with -vf to get a verbose output?

I'd suggest using make -d (debugging).  That would produce huge output 
(tens of MB at least, possibly hundreds of MB or more) but hopefully 
include enough information to trace what went wrong.

I don't know the right way to get the buildbot to run some tests with make 
-d until this error reoccurs.

Joseph S. Myers

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