Patch #1646728: datetime.fromtimestamp fails with negative
fractional times. With unittest.
Somebody please backport to 2.5.
diff --git a/Modules/datetimemodule.c b/Modules/datetimemodule.c
index cf8a68b..7487c50 100644
--- a/Modules/datetimemodule.c
+++ b/Modules/datetimemodule.c
@@ -3683,6 +3683,12 @@
return NULL;
fraction = timestamp - (double)timet;
us = (int)round_to_long(fraction * 1e6);
+ if (us < 0) {
+ /* Truncation towards zero is not what we wanted
+ for negative numbers (Python's mod semantics) */
+ timet -= 1;
+ us += 1000000;
+ }
/* If timestamp is less than one microsecond smaller than a
* full second, round up. Otherwise, ValueErrors are raised
* for some floats. */