Github user jongyoul commented on the issue:
https://github.com/apache/zeppelin/pull/2111
@Remilito I've reverted this PR because it breaks all CI build.
```
$ changedfiles=$(git diff --name-only $TRAVIS_COMMIT_RANGE)
fatal: ambiguous argument '38d0207cd99d...362b7ca3c209': unknown revision
or path not in the working tree.
Use '--' to separate paths from revisions, like this:
'git <command> [<revision>...] -- [<file>...]'
The command "changedfiles=$(git diff --name-only $TRAVIS_COMMIT_RANGE)"
failed and exited with 128 during .
Your build has been stopped.
```
In case of push with "--force" option, TRAVIS_COMMIT_RANGE got wrong value.
Can you take a look again?
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