From: Sergey Poznyakoff <gray@gnu.org.ua>
To: <bug-gnulib@gnu.org>
Subject: parse-datetime.y reports integer overflow when compiled with gcc 5.5.0
Date: Fri, 08 Jan 2021 16:37:02 +0200 [thread overview]
Message-ID: <20210108163702.27423@ulysses.gnu.org.ua> (raw)
Hello,
With recent gnulib (v0.1-4336-gbdae9a5), attempting to compile
parse-datetime.c fails with:
$ make -k parse-datetime.o V=1
gcc -DHAVE_CONFIG_H -I. -I.. -Wall -ggdb -MT parse-datetime.o -MD -MP -MF .deps/parse-datetime.Tpo -c -o parse-datetime.o parse-datetime.c
In file included from parse-datetime.y:39:0:
parse-datetime.y: In function 'to_tm_year':
intprops.h:578:17: warning: integer overflow in expression [-Woverflow]
|| (tmax) + (b) < (a)))
^
intprops.h:524:4: note: in expansion of macro '_GL_INT_SUBTRACT_RANGE_OVERFLOW'
(overflow (a, b, tmin, tmax) \
^
intprops.h:491:10: note: in expansion of macro '_GL_INT_OP_CALC'
? _GL_INT_OP_CALC (a, b, r, op, overflow, unsigned int, \
^
intprops.h:389:4: note: in expansion of macro '_GL_INT_OP_WRAPV'
_GL_INT_OP_WRAPV (a, b, r, -, _GL_INT_SUBTRACT_RANGE_OVERFLOW)
^
parse-datetime.y:1274:9: note: in expansion of macro 'INT_SUBTRACT_WRAPV'
: INT_SUBTRACT_WRAPV (year, TM_YEAR_BASE, tm_year))
^
parse-datetime.y: In function 'yylex':
intprops.h:578:17: warning: integer overflow in expression [-Woverflow]
|| (tmax) + (b) < (a)))
^
intprops.h:524:4: note: in expansion of macro '_GL_INT_SUBTRACT_RANGE_OVERFLOW'
(overflow (a, b, tmin, tmax) \
^
intprops.h:500:11: note: in expansion of macro '_GL_INT_OP_CALC'
? _GL_INT_OP_CALC (a, b, r, op, overflow, unsigned long int, \
^
intprops.h:495:7: note: in expansion of macro '_GL_INT_OP_WRAPV_LONGISH'
: _GL_INT_OP_WRAPV_LONGISH(a, b, r, op, overflow))
^
intprops.h:389:4: note: in expansion of macro '_GL_INT_OP_WRAPV'
_GL_INT_OP_WRAPV (a, b, r, -, _GL_INT_SUBTRACT_RANGE_OVERFLOW)
^
parse-datetime.y:1469:23: note: in expansion of macro 'INT_SUBTRACT_WRAPV'
if (INT_SUBTRACT_WRAPV (s, 1, &s))
^
Bisecting shows that the bug was introduced by commit 55168f5fa7b3b95fbaa2be525b15f6ecd5500c02
Regards,
Sergey
next reply other threads:[~2021-01-08 14:37 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-08 14:37 Sergey Poznyakoff [this message]
2021-01-08 21:49 ` parse-datetime.y reports integer overflow when compiled with gcc 5.5.0 Bruno Haible
2021-01-08 22:00 ` Paul Eggert
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