Make a patch with only deletes and run check-webkit-style. I get this output $ check-webkit-style --git-commit head --verbose webkitpy.common.system.logutils: DEBUG Debug logging enabled. check-webkit-style: DEBUG Verbose logging enabled. webkitpy.common.system: DEBUG "git rev-parse --is-inside-work-tree" took 0.01s webkitpy.common.system: DEBUG "git rev-parse --git-dir" took 0.01s check-webkit-style: DEBUG WebKit checkout found with root: /WebKit/ webkitpy.style.main: DEBUG Changing to checkout root: /WebKit/ webkitpy.common.system: DEBUG "git diff --binary --no-ext-diff --full-index -M head^..head" took 0.02s webkitpy.style.patchreader: DEBUG Found 0 new or modified lines in: WebKitTools/Scripts/webkitpy/common/net/rietveld.py check-webkit-style: INFO Total errors found: 0 in 0 files The bug is in patchreader.py. It only checks style on files that have modified/new lines. That part makes sense. But since it doesn't call process_file, the test_file_reader thinks that no files were checked. This means that check-webkit-style errors out and webkit-patch upload prompts whether to continue.
*** This bug has been marked as a duplicate of bug 38169 ***