☠ Buildbot (Sourceware): gcc-autoregen - failed 'git diff ...' (failure) (master)

[builder--- via Gcc-testresults]

A failed build has been detected on builder gcc-autoregen while building gcc.

Full details are available at:
    https://builder.sourceware.org/buildbot/#/builders/269/builds/12741

Build state: failed 'git diff ...' (failure)
Revision: bb555badd4eb5d71af45f1056c8e45ad287e70ba
Worker: bb1-2
Build Reason: (unknown)
Blamelist: Arthur Cohen <arthur.co...@embecosm.com>, Iain Buclaw 
<ibuc...@gdcproject.org>, Jakub Dupak <d...@jakubdupak.com>, John David Anglin 
<dang...@gcc.gnu.org>, Kushal Pal <kushalpal...@gmail.com>, Mael Cravero 
<mael.crav...@embecosm.com>, Michal Jires <mji...@suse.cz>, Nobel Singh 
<nobel2...@gmail.com>, Owen Avery <powerboat9.ga...@gmail.com>, Pierre-Emmanuel 
Patry <pierre-emmanuel.pa...@embecosm.com>, SIGMazer <mazina...@gmail.com>, 
Sahil Yeole <sahilyeol...@gmail.com>, jjasmine <tanghocle...@gmail.com>, 
zhanghe9702 <zhanghe9...@163.com>

Steps:

- 0: worker_preparation ( success )

- 1: git checkout ( success )
    Logs:
        - stdio: 
https://builder.sourceware.org/buildbot/#/builders/269/builds/12741/steps/1/logs/stdio

- 2: autoregen.py ( success )
    Logs:
        - stdio: 
https://builder.sourceware.org/buildbot/#/builders/269/builds/12741/steps/2/logs/stdio

- 3: git diff ( success )
    Logs:
        - stdio: 
https://builder.sourceware.org/buildbot/#/builders/269/builds/12741/steps/3/logs/stdio

- 4: mkdir objdir ( success )
    Logs:
        - stdio: 
https://builder.sourceware.org/buildbot/#/builders/269/builds/12741/steps/4/logs/stdio

- 5: configure ( success )
    Logs:
        - stdio: 
https://builder.sourceware.org/buildbot/#/builders/269/builds/12741/steps/5/logs/stdio

- 6: make html ( warnings )
    Logs:
        - stdio: 
https://builder.sourceware.org/buildbot/#/builders/269/builds/12741/steps/6/logs/stdio
        - warnings (147): 
https://builder.sourceware.org/buildbot/#/builders/269/builds/12741/steps/6/logs/warnings__147_

- 7: make regenerate-opt-urls ( success )
    Logs:
        - stdio: 
https://builder.sourceware.org/buildbot/#/builders/269/builds/12741/steps/7/logs/stdio

- 8: git diff_1 ( failure )
    Logs:
        - stdio: 
https://builder.sourceware.org/buildbot/#/builders/269/builds/12741/steps/8/logs/stdio