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Fix off-by-1 bug in --enable-checking=stringbytes

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Evidently nobody builds Emacs with --enable-checking=all,
which is no surprise as it is so slow as to be unusable nowadays.
Perhaps we should remove the slowest checks, or move them into
another category, or speed them up, or something.
* src/alloc.c (SDATA_SIZE) [GC_CHECK_STRING_BYTES]: Fix off-by-one
error in size calculation, which caused a failure when
--enable-checking=stringbytes was used.  I introduced this bug in
2016-09-08T01:08:45!eggert@cs.ucla.edu "Port flexible array
members to GCC + valgrind".
This commit is contained in:
Paul Eggert 2017-11-10 15:16:50 -08:00
parent 096f638ddc
commit 05aa6d4a68
1 changed files with 1 additions and 1 deletions
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src/alloc.c
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@ -1760,7 +1760,7 @@ static char const string_overrun_cookie[GC_STRING_OVERRUN_COOKIE_SIZE] =
#ifdef GC_CHECK_STRING_BYTES
#define SDATA_SIZE(NBYTES) FLEXSIZEOF (struct sdata, data, NBYTES)
#define SDATA_SIZE(NBYTES) FLEXSIZEOF (struct sdata, data, (NBYTES) + 1)
#else /* not GC_CHECK_STRING_BYTES */