From: samuel@... Date: 2018-06-29T04:47:41+00:00 Subject: [ruby-core:87676] [Ruby trunk Bug#14879] Adding/subtracting from time can change utc_offset unexpectedly. Issue #14879 has been updated by ioquatix (Samuel Williams). I have added some specs for this behaviour here: https://github.com/ioquatix/time-zone/blob/cdde65cd8f29d6d9fc645e2182093a7146048b44/spec/time/zone_spec.rb#L91-L99 You can see test results here: https://travis-ci.org/ioquatix/time-zone The work around for this bug was to convert whatever is the resulting time back into the correct timezone: https://github.com/ioquatix/time-zone/blob/cdde65cd8f29d6d9fc645e2182093a7146048b44/lib/time/zone/timestamp.rb#L79-L82 I'm open to suggestions for ways to improve this. ---------------------------------------- Bug #14879: Adding/subtracting from time can change utc_offset unexpectedly. https://bugs.ruby-lang.org/issues/14879#change-72699 * Author: ioquatix (Samuel Williams) * Status: Open * Priority: Normal * Assignee: * Target version: * ruby -v: * Backport: 2.3: UNKNOWN, 2.4: UNKNOWN, 2.5: UNKNOWN ---------------------------------------- I have been having some problems with `Time`. When I add or subtract seconds, sometimes the utc_offset is changed unexpectedly. ``` $ ruby -e 'require "time"; puts Time.parse("5pm NZT")' 2018-06-29 17:00:00 +1200 $ ruby -e 'require "time"; puts Time.parse("5pm NZT") + 1' 2018-06-29 17:00:01 +1200 $ TZ=UTC ruby -e 'require "time"; puts Time.parse("5pm NZT") + 1' 2018-06-29 17:00:01 +0000 ``` This seems like strange behaviour. The `utc_offset` shouldn't change IMHO. -- https://bugs.ruby-lang.org/ Unsubscribe: