More checks for live buffers.

* lisp/dired-x.el (dired-jump): Check if archive/tar superior buffer
was killed by the user.

* lisp/progmodes/ruby-mode.el (ruby-flymake--helper): Check if source buffer
was killed by the user immediately after visiting and before process finishes.
1 job for master in 60 minutes and 2 seconds (queued for 3 seconds)
Status Job ID Name Coverage
failed #670


Name Stage Failure
test-all Test The script exceeded the maximum execution time set for the job
  GEN      lisp/eshell/eshell-tests.log
ELC lisp/faces-tests.elc
GEN lisp/faces-tests.log
ELC lisp/ffap-tests.elc
GEN lisp/ffap-tests.log
ELC lisp/filenotify-tests.elc
GEN lisp/filenotify-tests.log
Pulling docker image gitlab/gitlab-runner-helper:x86_64-f100a208 ...
ERROR: Job failed: execution took longer than 1h0m0s seconds