Re: git for-each-ref crashes for %(body) with tags

2 messages, 2 authors, 2016-06-15 · open the first message on its own page

Re: git for-each-ref crashes for %(body) with tags

From: Junio C Hamano <hidden>
Date: 2016-06-15 22:45:11

"Han-Wen Nienhuys" [off-list ref] writes:
see gdb trace below.   Unfortunately, I don't have a repo that I can
readily share to demonstrate this.
You have a tag that has a single incomplete line as its payload.  The
attached patch should fix it, but I wonder how you created such an unusual
(I would not say "broken") tag to begin with?

diff --git i/builtin-for-each-ref.c w/builtin-for-each-ref.c
index 445039e..4d25ec5 100644
--- i/builtin-for-each-ref.c
+++ w/builtin-for-each-ref.c
@@ -459,8 +459,10 @@ static void find_subpos(const char *buf, unsigned long sz, const char **sub, con
 		return;
 	*sub = buf; /* first non-empty line */
 	buf = strchr(buf, '\n');
-	if (!buf)
+	if (!buf) {
+		*body = "";
 		return; /* no body */
+	}
 	while (*buf == '\n')
 		buf++; /* skip blank between subject and body */
 	*body = buf;

Re: git for-each-ref crashes for %(body) with tags

From: Han-Wen Nienhuys <hidden>
Date: 2016-06-15 22:45:11

From what I can see, the command responsible was
  git tag empty


it still works (v1.6.0):

$ git tag this-tag-has-no-body

$ git cat-file tag this-tag-has-no-body
fatal: git-cat-file this-tag-has-no-body: bad file

$ git cat-file commit this-tag-has-no-body |head -2
tree b51a1eb73af67d17f12114ed3e1e6f93d5adbaa8
parent 49e532412bbc84e4fb73f0862df61882dd7dbf89




On Wed, Aug 20, 2008 at 4:12 PM, Junio C Hamano [off-list ref] wrote:
quoted hunk
"Han-Wen Nienhuys" [off-list ref] writes:
quoted
see gdb trace below.   Unfortunately, I don't have a repo that I can
readily share to demonstrate this.
You have a tag that has a single incomplete line as its payload.  The
attached patch should fix it, but I wonder how you created such an unusual
(I would not say "broken") tag to begin with?

diff --git i/builtin-for-each-ref.c w/builtin-for-each-ref.c
index 445039e..4d25ec5 100644
--- i/builtin-for-each-ref.c
+++ w/builtin-for-each-ref.c
@@ -459,8 +459,10 @@ static void find_subpos(const char *buf, unsigned long sz, const char **sub, con
               return;
       *sub = buf; /* first non-empty line */
       buf = strchr(buf, '\n');
-       if (!buf)
+       if (!buf) {
+               *body = "";
               return; /* no body */
+       }
       while (*buf == '\n')
               buf++; /* skip blank between subject and body */
       *body = buf;


-- 
Han-Wen Nienhuys - hanwen@xs4all.nl - http://www.xs4all.nl/~hanwen
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