Re: git bisect Vs branch

["Santi Béjar" <santi@agolina.net>]

On Thu, Oct 22, 2009 at 5:48 PM, Grégory Romé <gregory.rome@maxim-ic.com> wrote:
> Considering the following story what is the method to find the regression
> with bisect?
>
> I cloned a git repository (origin) which derives from another one
> (first-origin). A merge is done from first-origin to origin at each stable
> release (identified by a tag).
>
> first-origin/master  *---A---------B-----------------------C-
>                         \         \                       \
> origin/master              ----------B'----------U-----------C'-
>                                     \           \           \   master
>                           ------------U'----------C''-
>
> Now, after that I merged C' I fixed the conflicts and compiled without error
> but I have a regression. It could come from any commit between B and C or U
> and C', and I need to modify my code to correct the issue.
>
> I would like to find the commit which introduce this regression by using git
> bisect but as the history is not linear it is not so easy (1). It though to
> create a linear history but I have no idea how to proceed...

You just have to proceed as normal, but you may test more commits than
with a linear history.

The only problem is iff the culprit is a merge commit (as in the
user-manual chapter you linked). And the "problem" is to know where
exactly in the (merge) commit is the bug, but not the procedure.

HTH,
Santi