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Merge branch 'jc/apply-trailing-blank-removal' into maint

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"git apply" misbehaved when fixing whitespace breakages by removing
excess trailing blank lines.

* jc/apply-trailing-blank-removal:
  apply.c:update_pre_post_images(): the preimage can be truncated
This commit is contained in:
Junio C Hamano 2013-01-14 07:33:08 -08:00
parent 659742f796 5de7166d46
commit 7842c44ccb
1 changed files with 17 additions and 6 deletions
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23
builtin/apply.c
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@ -2095,7 +2095,7 @@ static void update_pre_post_images(struct image *preimage,
char *buf,
size_t len, size_t postlen)
{
int i, ctx;
int i, ctx, reduced;
char *new, *old, *fixed;
struct image fixed_preimage;
@ -2105,8 +2105,10 @@ static void update_pre_post_images(struct image *preimage,
* free "oldlines".
*/
prepare_image(&fixed_preimage, buf, len, 1);
assert(fixed_preimage.nr == preimage->nr);
for (i = 0; i < preimage->nr; i++)
assert(postlen
? fixed_preimage.nr == preimage->nr
: fixed_preimage.nr <= preimage->nr);
for (i = 0; i < fixed_preimage.nr; i++)
fixed_preimage.line[i].flag = preimage->line[i].flag;
free(preimage->line_allocated);
*preimage = fixed_preimage;
@ -2126,7 +2128,8 @@ static void update_pre_post_images(struct image *preimage,
else
new = old;
fixed = preimage->buf;
for (i = ctx = 0; i < postimage->nr; i++) {
for (i = reduced = ctx = 0; i < postimage->nr; i++) {
size_t len = postimage->line[i].len;
if (!(postimage->line[i].flag & LINE_COMMON)) {
/* an added line -- no counterparts in preimage */
@ -2145,8 +2148,15 @@ static void update_pre_post_images(struct image *preimage,
fixed += preimage->line[ctx].len;
ctx++;
}
if (preimage->nr <= ctx)
die(_("oops"));
/*
* preimage is expected to run out, if the caller
* fixed addition of trailing blank lines.
*/
if (preimage->nr <= ctx) {
reduced++;
continue;
}
/* and copy it in, while fixing the line length */
len = preimage->line[ctx].len;
@ -2159,6 +2169,7 @@ static void update_pre_post_images(struct image *preimage,
/* Fix the length of the whole thing */
postimage->len = new - postimage->buf;
postimage->nr -= reduced;
}
static int match_fragment(struct image *img,