Thread (1 message) 1 message, 1 author, 2021-03-01

RE: [EXTERNAL] [PATCH v2 1/1] git mv foo FOO ; git mv foo bar gave an assert

From: Dan Moseley <hidden>
Date: 2021-03-01 20:26:56
Subsystem: the rest · Maintainer: Linus Torvalds

Possibly related (same subject, not in this thread)

quoted hunk
From: Torsten Bögershausen <redacted>

The following sequence, on a case-insensitive file system,
(strictly speeking with core.ignorecase=true)
leads to an assertion, 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".

Reported-By: Dan Moseley <redacted>

This fixes
https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Fgit-for-windows%2Fgit%2Fissues%2F2920&amp;data=04%7C01%7CDan.Moseley%40microsoft.com%7Cb659ba5925c543bcc3e708d8dcd41268%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637502150683596627%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=%2BLjQf5NooTUgOKbsyn10XCFIAgMw9v%2BKlhx8kDD6%2BIg%3D&amp;reserved=0

Signed-off-by: Torsten Bögershausen <redacted>
---
 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
Thank you Thorsten. This makes sense to me. Do you want to add a test? 
I believe this is what I had in my original patch, that worked pretty well:
diff --git a/t/t7001-mv.sh b/t/t7001-mv.sh
index 63d5f41a12..5c7fee9bd8 100755
--- a/t/t7001-mv.sh
+++ b/t/t7001-mv.sh
@@ -152,6 +152,14 @@ test_expect_success \
     'move into "."' \
     'git mv path1/path2/ .'

+test_expect_success \
+    'fail to move file already in index under different cased name' \
+    'echo 1 > foo &&
+     git add foo &&
+     git commit -m add_file -- foo &&
+     git mv foo FOO &&
+     test_expect_code 128 git mv foo BAR'
+
 test_expect_success "Michael Cassar's test case" '
        rm -fr .git papers partA &&
        git init &&
--
2.25.1
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