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time: time zone lookup using extend string makes wrong start time for non-DST zones [1.19 backport] #59074

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gopherbot opened this issue Mar 16, 2023 · 2 comments
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time: time zone lookup using extend string makes wrong start time for non-DST zones [1.19 backport] #59074

gopherbot opened this issue Mar 16, 2023 · 2 comments
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CherryPickApproved Used during the release process for point releases FrozenDueToAge
Milestone
Go1.19.8

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@gopherbot
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@ianlancetaylor requested issue #58682 to be considered for backport to the next 1.19 minor release.

@gopherbot Please open backport issues

We incorrectly handle the timezone bounds for timezones that used to have daylight savings time and then stopped.
@gopherbot gopherbot added the CherryPickCandidate Used during the release process for point releases label Mar 16, 2023
@gopherbot gopherbot mentioned this issue Mar 16, 2023
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@gopherbot gopherbot added this to the Go1.19.8 milestone Mar 16, 2023
@heschi heschi added the CherryPickApproved Used during the release process for point releases label Mar 22, 2023
@gopherbot gopherbot removed the CherryPickCandidate Used during the release process for point releases label Mar 22, 2023
@gopherbot
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Change https://go.dev/cl/478657 mentions this issue: [release-branch.go1.19] time: fix timezone lookup logic for non-DST zones

gopherbot pushed a commit that referenced this issue Mar 23, 2023
@KimMachineGun @gopherbot
[release-branch.go1.19] time: fix timezone lookup logic for non-DST z…
2adec52 
…ones

This change fixes time.LoadLocationFromTZData and time.Location.lookup logic if the given time is after the last transition and the extend string doesn't have the DST rule.

For #58682
Fixes #59074

Change-Id: Ie34a6d658d14c2b33098b29ab83c041ef0d34266
GitHub-Last-Rev: f6681eb
GitHub-Pull-Request: #58684
Reviewed-on: https://go-review.googlesource.com/c/go/+/471020
Reviewed-by: Ian Lance Taylor <iant@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@google.com>
(cherry picked from commit 90dde5d)
Reviewed-on: https://go-review.googlesource.com/c/go/+/478657
Reviewed-by: Heschi Kreinick <heschi@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Auto-Submit: Heschi Kreinick <heschi@google.com>
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Closed by merging 2adec52 to release-branch.go1.19.

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Go1.19.8
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