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If I can write a failing test, I can likely fix it. If I am interested in seeing who broke it and when, I can run git blame on the thing I'm fixing.

Given that my test suite is generally in the same repo as the code, I'd need to write something that patched my new test into the codebase at every git bisect commit, recompile and run it.

I can see that this may occasionally be useful if you have an extremely hard to find bug, but for me it's pretty rare. In fact I've done this once, ever.

Hence my skepticism when people describe this as "git's killer feature" or whatever other hyperbole.

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