[PATCH v3 1/1] git mv foo FOO ; git mv foo bar gave an assert

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From: Torsten Bögershausen <tboegi@xxxxxx>

The following sequence, on a case-insensitive file system,
(strictly speeking with core.ignorecase=true)
leads to an assertion failure and leaves .git/index.lock behind.

git init
echo foo >foo
git add foo
git mv foo FOO
git mv foo bar

This regression was introduced in Commit 9b906af657,
"git-mv: improve error message for conflicted file"

The bugfix is to change the "file exist case-insensitive in the index"
into the correct "file exist (case-sensitive) in the index".

This avoids the "assert" later in the code and keeps setting up the
"ce" pointer for ce_stage(ce) done in the next else if.

This fixes
https://github.com/git-for-windows/git/issues/2920

Reported-By: Dan Moseley <Dan.Moseley@xxxxxxxxxxxxx>
Signed-off-by: Torsten Bögershausen <tboegi@xxxxxx>
---
Changes since V2:
  avoid the trailer mess-up by putting "this fixes" before the trailers
  Make clearer why cache_name_pos() (leaving a dangling ce) followed
  by an additional cache_file_exists() to set up ce can be optimized
  into a single cache_file_exists()

builtin/mv.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/builtin/mv.c b/builtin/mv.c
index 7dac714af9..3fccdcb645 100644
--- a/builtin/mv.c
+++ b/builtin/mv.c
@@ -221,7 +221,7 @@ int cmd_mv(int argc, const char **argv, const char *prefix)
 				}
 				argc += last - first;
 			}
-		} else if (!(ce = cache_file_exists(src, length, ignore_case))) {
+		} else if (!(ce = cache_file_exists(src, length, 0))) {
 			bad = _("not under version control");
 		} else if (ce_stage(ce)) {
 			bad = _("conflicted");
--
2.30.0.155.g66e871b664





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