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diffstat rename squashing fix.
When renaming leading/a/filename to leading/b/filename (and "filename" is sufficiently long), we tried to squash the rename to "leading/{a => b}/filename". However, when "/a" or "/b" part is empty, we underflowed and tried to print a substring of length -1. Signed-off-by: Junio C Hamano <junkio@cox.net>
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9
diff.c
9
diff.c
@ -232,11 +232,16 @@ static char *pprint_rename(const char *a, const char *b)
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* name-a => name-b
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*/
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if (pfx_length + sfx_length) {
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int a_midlen = len_a - pfx_length - sfx_length;
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int b_midlen = len_b - pfx_length - sfx_length;
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if (a_midlen < 0) a_midlen = 0;
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if (b_midlen < 0) b_midlen = 0;
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name = xmalloc(len_a + len_b - pfx_length - sfx_length + 7);
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sprintf(name, "%.*s{%.*s => %.*s}%s",
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pfx_length, a,
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len_a - pfx_length - sfx_length, a + pfx_length,
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len_b - pfx_length - sfx_length, b + pfx_length,
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a_midlen, a + pfx_length,
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b_midlen, b + pfx_length,
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a + len_a - sfx_length);
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}
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else {
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