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path/filepath: TestEvalSymlinksAboveRoot failures on macOS #37910

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bcmills opened this issue Mar 18, 2020 · 10 comments
Open

path/filepath: TestEvalSymlinksAboveRoot failures on macOS #37910

bcmills opened this issue Mar 18, 2020 · 10 comments
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NeedsInvestigation Someone must examine and confirm this is a valid issue and not a duplicate of an existing one. OS-Darwin
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@bcmills
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bcmills commented Mar 18, 2020

2020-03-17T20:48:23-0eeec4f/darwin-amd64-race

--- FAIL: TestEvalSymlinksAboveRoot (0.01s)
    path_test.go:1449: EvalSymlinks("/private/var/folders/kh/5zzynz152r94t18yzstnrwx80000gn/T/workdir-host-darwin-10_15/tmp/TestEvalSymlinksAboveRoot800207813/../../../../../../../../../private/var/folders/kh/5zzynz152r94t18yzstnrwx80000gn/T/workdir-host-darwin-10_15/tmp/TestEvalSymlinksAboveRoot800207813/b/file") = "/private/var/folders/kh/5zzynz152r94t18yzstnrwx80000gn/T/workdir-host-darwin-10_15/tmp/TestEvalSymlinksAboveRoot800207813/a/file"
    path_test.go:1449: EvalSymlinks("/private/var/folders/kh/5zzynz152r94t18yzstnrwx80000gn/T/workdir-host-darwin-10_15/tmp/TestEvalSymlinksAboveRoot800207813/../../../../../../../../../../private/var/folders/kh/5zzynz152r94t18yzstnrwx80000gn/T/workdir-host-darwin-10_15/tmp/TestEvalSymlinksAboveRoot800207813/b/file") = "/private/var/folders/kh/5zzynz152r94t18yzstnrwx80000gn/T/workdir-host-darwin-10_15/tmp/TestEvalSymlinksAboveRoot800207813/a/file"
    path_test.go:1445: EvalSymlinks("/private/var/folders/kh/5zzynz152r94t18yzstnrwx80000gn/T/workdir-host-darwin-10_15/tmp/TestEvalSymlinksAboveRoot800207813/../../../../../../../../../../../private/var/folders/kh/5zzynz152r94t18yzstnrwx80000gn/T/workdir-host-darwin-10_15/tmp/TestEvalSymlinksAboveRoot800207813/b/file") failed: lstat /private/../../../private/var: no such file or directory
FAIL
FAIL	path/filepath	0.252s

See previously #35201.
@bcmills bcmills added OS-Darwin NeedsInvestigation Someone must examine and confirm this is a valid issue and not a duplicate of an existing one. labels Mar 18, 2020
@bcmills bcmills added this to the Backlog milestone Mar 18, 2020
@bcmills
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bcmills commented Mar 18, 2020

Given the general flakiness of macOS filesystems, I wouldn't be surprised if this is due to a platform bug. (But I wouldn't be entirely surprised if it's a Go bug either.)

CC @ianlancetaylor @cagedmantis

@bcmills
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bcmills commented Apr 14, 2020

2020-04-13T23:27:02-5a706d1/darwin-amd64-race
2020-03-23T16:55:37-7af6a31/darwin-amd64-race
2020-03-22T11:16:34-9a2db7c/darwin-amd64-race

@bcmills
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bcmills commented Apr 22, 2020

2020-04-21T20:49:34-2a2423b/darwin-amd64-race

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bcmills commented Apr 30, 2020

2020-04-29T21:29:17-faafdf5/darwin-amd64-race
2020-04-28T18:41:07-39380e8/darwin-amd64-race

@bcmills bcmills changed the title path/filepath: TestEvalSymlinksAboveRoot failure on darwin-amd64-race builder path/filepath: TestEvalSymlinksAboveRoot failures on darwin-amd64-race builder Apr 30, 2020
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bcmills commented Sep 25, 2020

2020-09-25T03:59:54-2333c62/darwin-amd64-race
2020-09-17T19:18:10-35e413c/darwin-amd64-10_15
2020-09-16T17:07:38-2ae2a94/darwin-amd64-race
2020-08-18T20:05:33-30a68bf/darwin-amd64-race
2020-07-06T20:17:51-20afbe8/darwin-amd64-race
2020-06-15T23:29:23-d286e61/darwin-amd64-race
2020-06-03T16:05:37-9e56bcb/darwin-amd64-race

@bcmills
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bcmills commented Nov 9, 2020

2020-11-07T22:38:01-afe7c8d/darwin-amd64-10_15
2020-11-06T23:59:04-f7ef5ca/darwin-amd64-race
2020-11-04T21:26:23-5ed81a3/darwin-amd64-race
2020-10-28T17:54:13-fc116b6/darwin-amd64-race
2020-10-27T18:23:46-e3bb53a/darwin-amd64-race
2020-10-22T18:16:29-2ad4415/darwin-amd64-10_15
2020-10-17T00:01:00-f1e3c8f/darwin-amd64-race
2020-10-13T01:16:56-85f829d/darwin-amd64-10_15
2020-10-12T17:22:19-3736957/darwin-amd64-10_15
2020-10-01T17:47:21-adef4de/darwin-amd64-race
2020-09-26T15:48:06-66fbb80/darwin-amd64-race

@bcmills bcmills changed the title path/filepath: TestEvalSymlinksAboveRoot failures on darwin-amd64-race builder path/filepath: TestEvalSymlinksAboveRoot failures on darwin-amd64 builders Nov 9, 2020
@dmitshur
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I've run into this failure on darwin/arm64 as well, so it's not just darwin/amd64.

It seems to be quite easy to reproduce when the system is under load with:

$ go version
go version devel +7716a2fbb7 Sun Nov 22 11:44:49 2020 -0500 darwin/arm64  # CL 272258 PS 1
$ go test path/filepath -run=TestEvalSymlinksAboveRoot -count=1000
--- FAIL: TestEvalSymlinksAboveRoot (0.00s)
    path_test.go:1485: EvalSymlinks("/private/var/folders/_0/h0671fcn4rgb5pn9c745dx2h0000gn/T/TestEvalSymlinksAboveRoot880924197/../../../../../../../private/var/folders/_0/h0671fcn4rgb5pn9c745dx2h0000gn/T/TestEvalSymlinksAboveRoot880924197/b/file") = "/private/var/folders/_0/h0671fcn4rgb5pn9c745dx2h0000gn/T/TestEvalSymlinksAboveRoot880924197/a/file"
    path_test.go:1481: EvalSymlinks("/private/var/folders/_0/h0671fcn4rgb5pn9c745dx2h0000gn/T/TestEvalSymlinksAboveRoot880924197/../../../../../../../../private/var/folders/_0/h0671fcn4rgb5pn9c745dx2h0000gn/T/TestEvalSymlinksAboveRoot880924197/b/file") failed: lstat /private/../../private/var/folders/_0/h0671fcn4rgb5pn9c745dx2h0000gn/T: no such file or directory
    path_test.go:1481: EvalSymlinks("/private/var/folders/_0/h0671fcn4rgb5pn9c745dx2h0000gn/T/TestEvalSymlinksAboveRoot880924197/../../../../../../../../../private/var/folders/_0/h0671fcn4rgb5pn9c745dx2h0000gn/T/TestEvalSymlinksAboveRoot880924197/b/file") failed: lstat /private/../../../private: no such file or directory
FAIL
FAIL	path/filepath	2.797s
FAIL

But hard to reproduce when the system isn't under load.

@dmitshur dmitshur changed the title path/filepath: TestEvalSymlinksAboveRoot failures on darwin-amd64 builders path/filepath: TestEvalSymlinksAboveRoot failures on macOS Nov 23, 2020
@bcmills
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bcmills commented Feb 22, 2021

2021-02-20T03:54:48-0625460/darwin-amd64-race
2021-02-16T18:25:10-6f3da9d/darwin-amd64-race
2021-01-08T05:00:06-304f769/darwin-amd64-race
2020-12-22T20:00:00-c9fb4eb/darwin-amd64-race
2020-11-25T02:51:30-1308f11/darwin-amd64-10_15

@bcmills
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bcmills commented Mar 19, 2021

2021-03-19T01:02:56-dcc96e4/darwin-arm64-11_0-toothrot
2021-03-04T03:29:58-95ff296/darwin-amd64-race
2021-02-25T15:24:25-9fe8ebf/darwin-amd64-race

@gopherbot
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Change https://golang.org/cl/332009 mentions this issue: path/filepath: deflake TestEvalSymlinksAboveRoot on darwin

gopherbot pushed a commit that referenced this issue Jun 30, 2021
@josharian
path/filepath: deflake TestEvalSymlinksAboveRoot on darwin
ed56ea7 
On darwin, under load, it appears that the system occasionally
deletes the temp dir mid-test. Don't fail the test when that happens.

It would be nice to fix this in a deeper way.
See golang.org/cl/332009 for some discussion.

In the meantime, this will at least stop the flakiness.

Updates #37910

Change-Id: I6669e466fed9abda4a87ca88345c04cd7986b41e
Reviewed-on: https://go-review.googlesource.com/c/go/+/332009
Trust: Josh Bleecher Snyder <josharian@gmail.com>
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
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