This patchest fixes some bugs in localtime.c when TZif files specify a UT offset equal to -2**31. Such an offset overflows when negated on a 32-bit platform, and this leads to undefined behavior – typically wraparound arithmetic, but the C standard says anything can happen. The patchset also changes zic.c to reject attempts to create such an offset, adjusts some nearby code to be a bit cleaner and more portable. Paul Eggert (5): Omit unnecessary L suffixes zic no longer generates utoff == -2**31 Make sure 2**31 - 1 is signed Port TWOS_COMPLEMENT to signed-magnitude hosts Disallow UT offsets equal to -2**31 NEWS | 4 ++++ localtime.c | 48 ++++++++++++++++++++++++++++++++---------------- private.h | 7 +++++-- strftime.c | 5 +++-- zic.c | 7 ++++--- 5 files changed, 48 insertions(+), 23 deletions(-) -- 2.51.0