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runtime/pprof: flaky TestBlockProfile #6999

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gopherbot opened this issue Dec 21, 2013 · 13 comments
Open

runtime/pprof: flaky TestBlockProfile #6999

gopherbot opened this issue Dec 21, 2013 · 13 comments
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@gopherbot gopherbot commented Dec 21, 2013

by jphilbin@google.com:

What steps will reproduce the problem?

No go version currently installed.
$ hg clone -u release https://code.google.com/p/go
$ cd go/src
$ ./all.bash

Get the following failure:
===
--- FAIL: TestBlockProfile (0.17 seconds)
        pprof_test.go:332: Bad chan recv entry, expect:

                [0-9]+ [0-9]+ @ 0x[0-9,a-f]+ 0x[0-9,a-f]+ 0x[0-9,a-f]+ 0x[0-9,a-f]+ 0x[0-9,a-f]+
                #       0x[0-9,a-f]+    runtime\.chanrecv1\+0x[0-9,a-f]+        .*/src/pkg/runtime/chan.c:[0-9]+
                #       0x[0-9,a-f]+    runtime/pprof_test\.blockChanRecv\+0x[0-9,a-f]+ .*/src/pkg/runtime/pprof/pprof_test.go:[0-9]+
                #       0x[0-9,a-f]+    runtime/pprof_test\.TestBlockProfile\+0x[0-9,a-f]+      .*/src/pkg/runtime/pprof/pprof_test.go:[0-9]+

                got:
                --- contention:
                cycles/second=1659580313
                27164213 1 @ 0x4052e2 0x439bec 0x439229 0x4325eb 0x417a30
                #       0x4052e2        runtime.selectgo+0x12                           /home/jphilbin/go/src/pkg/runtime/chan.c:840
                #       0x439bec        runtime/pprof_test.blockSelectSendSync+0x12c    /home/jphilbin/go/src/pkg/runtime/pprof/pprof_test.go:386
                #       0x439229        runtime/pprof_test.TestBlockProfile+0x189       /home/jphilbin/go/src/pkg/runtime/pprof/pprof_test.go:320
                #       0x4325eb        testing.tRunner+0x8b                            /home/jphilbin/go/src/pkg/testing/testing.go:391

                17075383 1 @ 0x45e596 0x439c64 0x439229 0x4325eb 0x417a30
                #       0x45e596        sync.(*Mutex).Lock+0xd6                         /home/jphilbin/go/src/pkg/sync/mutex.go:66
                #       0x439c64        runtime/pprof_test.blockMutex+0x74              /home/jphilbin/go/src/pkg/runtime/pprof/pprof_test.go:399
                #       0x439229        runtime/pprof_test.TestBlockProfile+0x189       /home/jphilbin/go/src/pkg/runtime/pprof/pprof_test.go:320
                #       0x4325eb        testing.tRunner+0x8b                            /home/jphilbin/go/src/pkg/testing/testing.go:391

                17055513 1 @ 0x404c68 0x43998b 0x439229 0x4325eb 0x417a30
                #       0x404c68        runtime.chanrecv1+0x38                          /home/jphilbin/go/src/pkg/runtime/chan.c:446
                #       0x43998b        runtime/pprof_test.blockChanClose+0x9b          /home/jphilbin/go/src/pkg/runtime/pprof/pprof_test.go:363
                #       0x439229        runtime/pprof_test.TestBlockProfile+0x189       /home/jphilbin/go/src/pkg/runtime/pprof/pprof_test.go:320
                #       0x4325eb        testing.tRunner+0x8b                            /home/jphilbin/go/src/pkg/testing/testing.go:391

                17000189 1 @ 0x404c1c 0x4398e0 0x439229 0x4325eb 0x417a30
                #       0x404c1c        runtime.chansend1+0x4c                          /home/jphilbin/go/src/pkg/runtime/chan.c:438
                #       0x4398e0        runtime/pprof_test.blockChanSend+0xa0           /home/jphilbin/go/src/pkg/runtime/pprof/pprof_test.go:354
                #       0x439229        runtime/pprof_test.TestBlockProfile+0x189       /home/jphilbin/go/src/pkg/runtime/pprof/pprof_test.go:320
                #       0x4325eb        testing.tRunner+0x8b                            /home/jphilbin/go/src/pkg/testing/testing.go:391

                16926852 1 @ 0x4052e2 0x439ab1 0x439229 0x4325eb 0x417a30
                #       0x4052e2        runtime.selectgo+0x12                           /home/jphilbin/go/src/pkg/runtime/chan.c:840
                #       0x439ab1        runtime/pprof_test.blockSelectRecvAsync+0x121   /home/jphilbin/go/src/pkg/runtime/pprof/pprof_test.go:373
                #       0x439229        runtime/pprof_test.TestBlockProfile+0x189       /home/jphilbin/go/src/pkg/runtime/pprof/pprof_test.go:320
                #       0x4325eb        testing.tRunner+0x8b                            /home/jphilbin/go/src/pkg/testing/testing.go:391

FAIL
FAIL    runtime/pprof   8.001s
===

Which operating system are you using?
Ubuntu 12.10 amd64


Which version are you using?  (run 'go version')
go version go1.2 linux/amd64
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@gopherbot gopherbot commented Dec 21, 2013

Comment 1 by jphilbin@google.com:

I realized that the failing test is in runtime/pprof and not in runtime/debug (that was
the previous test that passed ok).
There doesn't seem to be a way to edit issue titles once they're submitted?
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@gopherbot gopherbot commented Feb 19, 2014

Comment 4 by capnm9:

I've seen the same failure on the tip.
changeset:   19174:f28dc1ba53cf
tag:         tip
user:        Rob Pike <r@golang.org>
date:        Wed Feb 19 15:01:50 2014 -0800
summary:     cmd/pack: dump output of command of "go env" command in test
uname -a
Linux 3.8.0-35-generic #50-Ubuntu SMP Tue Dec 3 01:24:59 UTC 2013 x86_64 x86_64 x86_64
GNU/Linux
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@rsc rsc commented Mar 3, 2014

Comment 5:

Labels changed: added release-go1.3.

Status changed to Accepted.

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@rsc rsc commented May 11, 2014

Comment 6:

I believe this is happening but clearly not very often. It can wait I guess.

Labels changed: added release-none, suggested, removed release-go1.3.

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@gopherbot gopherbot commented Jun 20, 2014

Comment 7 by jetze.van.beijma:

Also got the same error on Ubuntu 12.04 with go release 1.3.
3.5.0-49-generic #74~precise1-Ubuntu SMP Fri May 2 21:32:31 UTC 2014 x86_64 x86_64
x86_64 GNU/Linux
go version go1.3 linux/amd64
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@dvyukov dvyukov commented Jun 20, 2014

Comment 8:

is it exactly the same? or just a failure of the same test?
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@gopherbot gopherbot commented Sep 7, 2014

Comment 9 by capnm9:

I currently see similar failures (ca. 1x/10 times).
3.13.0-35-generic #62-Ubuntu SMP Fri Aug 15 01:58:42 UTC 2014 x86_64 x86_64 x86_64
GNU/Linux
428dd5a62a9d tip
----
--- FAIL: TestBlockProfile (0.18s)
    pprof_test.go:370: Bad select send sync entry, expect:
        
        [0-9]+ [0-9]+ @ 0x[0-9,a-f]+ 0x[0-9,a-f]+ 0x[0-9,a-f]+ 0x[0-9,a-f]+ 0x[0-9,a-f]+
        #   0x[0-9,a-f]+    runtime\.selectgo\+0x[0-9,a-f]+ .*/src/pkg/runtime/select.go:[0-9]+
        #   0x[0-9,a-f]+    runtime/pprof_test\.blockSelectSendSync\+0x[0-9,a-f]+   .*/src/pkg/runtime/pprof/pprof_test.go:[0-9]+
        #   0x[0-9,a-f]+    runtime/pprof_test\.TestBlockProfile\+0x[0-9,a-f]+  .*/src/pkg/runtime/pprof/pprof_test.go:[0-9]+
        
        got:
        --- contention:
        cycles/second=2505600281
        139908672 1 @ 0x4126e2 0x452c72 0x45230c 0x44b21b 0x42c3d0
        #   0x4126e2    runtime.selectgo+0x12               /tmp2/go/src/pkg/runtime/select.go:183
        #   0x452c72    runtime/pprof_test.blockSelectRecvAsync+0x152   /tmp2/go/src/pkg/runtime/pprof/pprof_test.go:411
        #   0x45230c    runtime/pprof_test.TestBlockProfile+0x1ac   /tmp2/go/src/pkg/runtime/pprof/pprof_test.go:358
        #   0x44b21b    testing.tRunner+0x8b                /tmp2/go/src/pkg/testing/testing.go:427
        
        25348446 1 @ 0x47f552 0x452e7c 0x45230c 0x44b21b 0x42c3d0
        #   0x47f552    sync.(*Mutex).Lock+0xd2             /tmp2/go/src/pkg/sync/mutex.go:66
        #   0x452e7c    runtime/pprof_test.blockMutex+0x7c      /tmp2/go/src/pkg/runtime/pprof/pprof_test.go:437
        #   0x45230c    runtime/pprof_test.TestBlockProfile+0x1ac   /tmp2/go/src/pkg/runtime/pprof/pprof_test.go:358
        #   0x44b21b    testing.tRunner+0x8b                /tmp2/go/src/pkg/testing/testing.go:427
        
        25318732 1 @ 0x47f1cd 0x452fae 0x45230c 0x44b21b 0x42c3d0
        #   0x47f1cd    sync.(*Cond).Wait+0x9d              /tmp2/go/src/pkg/sync/cond.go:63
        #   0x452fae    runtime/pprof_test.blockCond+0x11e      /tmp2/go/src/pkg/runtime/pprof/pprof_test.go:450
        #   0x45230c    runtime/pprof_test.TestBlockProfile+0x1ac   /tmp2/go/src/pkg/runtime/pprof/pprof_test.go:358
        #   0x44b21b    testing.tRunner+0x8b                /tmp2/go/src/pkg/testing/testing.go:427
        
        25286875 1 @ 0x402f6b 0x452992 0x45230c 0x44b21b 0x42c3d0
        #   0x402f6b    runtime.chanrecv1+0x2b              /tmp2/go/src/pkg/runtime/chan.go:308
        #   0x452992    runtime/pprof_test.blockChanRecv+0xb2       /tmp2/go/src/pkg/runtime/pprof/pprof_test.go:383
        #   0x45230c    runtime/pprof_test.TestBlockProfile+0x1ac   /tmp2/go/src/pkg/runtime/pprof/pprof_test.go:358
        #   0x44b21b    testing.tRunner+0x8b                /tmp2/go/src/pkg/testing/testing.go:427
        
        25279242 1 @ 0x402f6b 0x452b12 0x45230c 0x44b21b 0x42c3d0
        #   0x402f6b    runtime.chanrecv1+0x2b              /tmp2/go/src/pkg/runtime/chan.go:308
        #   0x452b12    runtime/pprof_test.blockChanClose+0xb2      /tmp2/go/src/pkg/runtime/pprof/pprof_test.go:401
        #   0x45230c    runtime/pprof_test.TestBlockProfile+0x1ac   /tmp2/go/src/pkg/runtime/pprof/pprof_test.go:358
        #   0x44b21b    testing.tRunner+0x8b                /tmp2/go/src/pkg/testing/testing.go:427
        
        25268569 1 @ 0x402483 0x452a58 0x45230c 0x44b21b 0x42c3d0
        #   0x402483    runtime.chansend1+0x43              /tmp2/go/src/pkg/runtime/chan.go:69
        #   0x452a58    runtime/pprof_test.blockChanSend+0xb8       /tmp2/go/src/pkg/runtime/pprof/pprof_test.go:392
        #   0x45230c    runtime/pprof_test.TestBlockProfile+0x1ac   /tmp2/go/src/pkg/runtime/pprof/pprof_test.go:358
        #   0x44b21b    testing.tRunner+0x8b                /tmp2/go/src/pkg/testing/testing.go:427
        
FAIL
FAIL    runtime/pprof   8.420s
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@griesemer griesemer commented Oct 1, 2014

Comment 10:

Labels changed: added repo-main.

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@gopherbot gopherbot commented Oct 10, 2014

Comment 11 by viriketo:

It happens to me often 3/4 times at least. x86_64-linux 3.14.17 SMP, dualcore AMD Athlon
4800+.
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@gopherbot gopherbot commented Oct 10, 2014

Comment 12 by viriketo:

^ I've seen it with go 1.3.2 and 1.3.3.
@rsc rsc added this to the Unplanned milestone Apr 10, 2015
@rsc rsc removed release-none labels Apr 10, 2015
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@mikioh mikioh commented May 13, 2016

TestBlockProfile still fails w/ Bad mutex entry on tip (go1.7 devel). See https://storage.googleapis.com/go-build-log/88cc348c/freebsd-386-gce101_92f2a1f0.log

--- FAIL: TestBlockProfile (0.34s)
    pprof_test.go:498: Bad mutex entry, expect:

        [0-9]+ [0-9]+ @ 0x[0-9,a-f]+ 0x[0-9,a-f]+ 0x[0-9,a-f]+ 0x[0-9,a-f]+ 0x[0-9,a-f]+
        #   0x[0-9,a-f]+    sync\.\(\*Mutex\)\.Lock\+0x[0-9,a-f]+   .*/src/sync/mutex\.go:[0-9]+
        #   0x[0-9,a-f]+    runtime/pprof_test\.blockMutex\+0x[0-9,a-f]+    .*/src/runtime/pprof/pprof_test.go:[0-9]+
        #   0x[0-9,a-f]+    runtime/pprof_test\.TestBlockProfile\+0x[0-9,a-f]+  .*/src/runtime/pprof/pprof_test.go:[0-9]+

        got:
        --- contention:
        cycles/second=2500072104
        309534400 1 @ 0x807e36f 0x80ba15d 0x80b98aa 0x80adad6 0x809ae61
        #   0x807e36e   runtime.selectgo+0xe                /tmp/workdir/go/src/runtime/select.go:238
        #   0x80ba15c   runtime/pprof_test.blockSelectSendSync+0x11c    /tmp/workdir/go/src/runtime/pprof/pprof_test.go:557
        #   0x80b98a9   runtime/pprof_test.TestBlockProfile+0x179   /tmp/workdir/go/src/runtime/pprof/pprof_test.go:486
        #   0x80adad5   testing.tRunner+0x85                /tmp/workdir/go/src/testing/testing.go:547
        #   0x0

        81366149 3 @ 0x807e36f 0x80ba02c 0x80b98aa 0x80adad6 0x809ae61
        #   0x807e36e   runtime.selectgo+0xe                /tmp/workdir/go/src/runtime/select.go:238
        #   0x80ba02b   runtime/pprof_test.blockSelectRecvAsync+0x11b   /tmp/workdir/go/src/runtime/pprof/pprof_test.go:543
        #   0x80b98a9   runtime/pprof_test.TestBlockProfile+0x179   /tmp/workdir/go/src/runtime/pprof/pprof_test.go:486
        #   0x80adad5   testing.tRunner+0x85                /tmp/workdir/go/src/testing/testing.go:547
        #   0x0

        27756951 1 @ 0x804bc64 0x80b9ef8 0x80b98aa 0x80adad6 0x809ae61
        #   0x804bc63   runtime.chanrecv1+0x23              /tmp/workdir/go/src/runtime/chan.go:378
        #   0x80b9ef7   runtime/pprof_test.blockChanClose+0x67      /tmp/workdir/go/src/runtime/pprof/pprof_test.go:529
        #   0x80b98a9   runtime/pprof_test.TestBlockProfile+0x179   /tmp/workdir/go/src/runtime/pprof/pprof_test.go:486
        #   0x80adad5   testing.tRunner+0x85                /tmp/workdir/go/src/testing/testing.go:547
        #   0x0

        27539367 1 @ 0x804bc64 0x80b9df8 0x80b98aa 0x80adad6 0x809ae61
        #   0x804bc63   runtime.chanrecv1+0x23              /tmp/workdir/go/src/runtime/chan.go:378
        #   0x80b9df7   runtime/pprof_test.blockChanRecv+0x67       /tmp/workdir/go/src/runtime/pprof/pprof_test.go:511
        #   0x80b98a9   runtime/pprof_test.TestBlockProfile+0x179   /tmp/workdir/go/src/runtime/pprof/pprof_test.go:486
        #   0x80adad5   testing.tRunner+0x85                /tmp/workdir/go/src/testing/testing.go:547
        #   0x0

        27133934 1 @ 0x804b268 0x80b9e7d 0x80b98aa 0x80adad6 0x809ae61
        #   0x804b267   runtime.chansend1+0x37              /tmp/workdir/go/src/runtime/chan.go:107
        #   0x80b9e7c   runtime/pprof_test.blockChanSend+0x6c       /tmp/workdir/go/src/runtime/pprof/pprof_test.go:520
        #   0x80b98a9   runtime/pprof_test.TestBlockProfile+0x179   /tmp/workdir/go/src/runtime/pprof/pprof_test.go:486
        #   0x80adad5   testing.tRunner+0x85                /tmp/workdir/go/src/testing/testing.go:547
        #   0x0

        26345191 1 @ 0x80cb287 0x80ba290 0x80b98aa 0x80adad6 0x809ae61
        #   0x80cb286   sync.(*Cond).Wait+0x86              /tmp/workdir/go/src/sync/cond.go:57
        #   0x80ba28f   runtime/pprof_test.blockCond+0xbf       /tmp/workdir/go/src/runtime/pprof/pprof_test.go:583
        #   0x80b98a9   runtime/pprof_test.TestBlockProfile+0x179   /tmp/workdir/go/src/runtime/pprof/pprof_test.go:486
        #   0x80adad5   testing.tRunner+0x85                /tmp/workdir/go/src/testing/testing.go:547
        #   0x0

FAIL
@mikioh mikioh changed the title runtime/pprof: test failure during ./all.bash runtime/pprof: flaky TestBlockProfile May 13, 2016
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@rsc rsc commented Jun 28, 2019

I can't find any instances of this bug on any of our builders going back 6 months. Closing as fixed.

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@x448 x448 commented Jan 16, 2020

Ran clean.bash and all.bash in kvm with 2 cpu and 4 gb ram to build go1.13.6 using go1.12.12.

--- FAIL: TestBlockProfile (0.19s)
    --- FAIL: TestBlockProfile/debug=1 (0.10s)
        pprof_test.go:625: Bad chan recv entry, expect:
            
            [0-9]+ [0-9]+ @( 0x[[:xdigit:]]+)+
            #	0x[0-9a-f]+	runtime\.chanrecv1\+0x[0-9a-f]+	.*/src/runtime/chan.go:[0-9]+
            #	0x[0-9a-f]+	runtime/pprof\.blockChanRecv\+0x[0-9a-f]+	.*/src/runtime/pprof/pprof_test.go:[0-9]+
            #	0x[0-9a-f]+	runtime/pprof\.TestBlockProfile\+0x[0-9a-f]+	.*/src/runtime/pprof/pprof_test.go:[0-9]+
            
            got:
            --- contention:
            cycles/second=3491926309
            35317032 1 @ 0x469ddd 0x597afb 0x596f35 0x4f2039 0x45d971
            #	0x469ddc	sync.(*Cond).Wait+0x9c			/home/x448/go1.13/src/sync/cond.go:56
            #	0x597afa	runtime/pprof.blockCond+0xba		/home/x448/go1.13/src/runtime/pprof/pprof_test.go:767
            #	0x596f34	runtime/pprof.TestBlockProfile+0x454	/home/x448/go1.13/src/runtime/pprof/pprof_test.go:607
            #	0x4f2038	testing.tRunner+0xc8			/home/x448/go1.13/src/testing/testing.go:909
            
        pprof_test.go:625: Bad chan send entry, expect:
            
            [0-9]+ [0-9]+ @( 0x[[:xdigit:]]+)+
            #	0x[0-9a-f]+	runtime\.chansend1\+0x[0-9a-f]+	.*/src/runtime/chan.go:[0-9]+
            #	0x[0-9a-f]+	runtime/pprof\.blockChanSend\+0x[0-9a-f]+	.*/src/runtime/pprof/pprof_test.go:[0-9]+
            #	0x[0-9a-f]+	runtime/pprof\.TestBlockProfile\+0x[0-9a-f]+	.*/src/runtime/pprof/pprof_test.go:[0-9]+
            
            got:
            --- contention:
            cycles/second=3491926309
            35317032 1 @ 0x469ddd 0x597afb 0x596f35 0x4f2039 0x45d971
            #	0x469ddc	sync.(*Cond).Wait+0x9c			/home/x448/go1.13/src/sync/cond.go:56
            #	0x597afa	runtime/pprof.blockCond+0xba		/home/x448/go1.13/src/runtime/pprof/pprof_test.go:767
            #	0x596f34	runtime/pprof.TestBlockProfile+0x454	/home/x448/go1.13/src/runtime/pprof/pprof_test.go:607
            #	0x4f2038	testing.tRunner+0xc8			/home/x448/go1.13/src/testing/testing.go:909
            
        pprof_test.go:625: Bad chan close entry, expect:
            
            [0-9]+ [0-9]+ @( 0x[[:xdigit:]]+)+
            #	0x[0-9a-f]+	runtime\.chanrecv1\+0x[0-9a-f]+	.*/src/runtime/chan.go:[0-9]+
            #	0x[0-9a-f]+	runtime/pprof\.blockChanClose\+0x[0-9a-f]+	.*/src/runtime/pprof/pprof_test.go:[0-9]+
            #	0x[0-9a-f]+	runtime/pprof\.TestBlockProfile\+0x[0-9a-f]+	.*/src/runtime/pprof/pprof_test.go:[0-9]+
            
            got:
            --- contention:
            cycles/second=3491926309
            35317032 1 @ 0x469ddd 0x597afb 0x596f35 0x4f2039 0x45d971
            #	0x469ddc	sync.(*Cond).Wait+0x9c			/home/x448/go1.13/src/sync/cond.go:56
            #	0x597afa	runtime/pprof.blockCond+0xba		/home/x448/go1.13/src/runtime/pprof/pprof_test.go:767
            #	0x596f34	runtime/pprof.TestBlockProfile+0x454	/home/x448/go1.13/src/runtime/pprof/pprof_test.go:607
            #	0x4f2038	testing.tRunner+0xc8			/home/x448/go1.13/src/testing/testing.go:909
            
        pprof_test.go:625: Bad select recv async entry, expect:
            
            [0-9]+ [0-9]+ @( 0x[[:xdigit:]]+)+
            #	0x[0-9a-f]+	runtime\.selectgo\+0x[0-9a-f]+	.*/src/runtime/select.go:[0-9]+
            #	0x[0-9a-f]+	runtime/pprof\.blockSelectRecvAsync\+0x[0-9a-f]+	.*/src/runtime/pprof/pprof_test.go:[0-9]+
            #	0x[0-9a-f]+	runtime/pprof\.TestBlockProfile\+0x[0-9a-f]+	.*/src/runtime/pprof/pprof_test.go:[0-9]+
            
            got:
            --- contention:
            cycles/second=3491926309
            35317032 1 @ 0x469ddd 0x597afb 0x596f35 0x4f2039 0x45d971
            #	0x469ddc	sync.(*Cond).Wait+0x9c			/home/x448/go1.13/src/sync/cond.go:56
            #	0x597afa	runtime/pprof.blockCond+0xba		/home/x448/go1.13/src/runtime/pprof/pprof_test.go:767
            #	0x596f34	runtime/pprof.TestBlockProfile+0x454	/home/x448/go1.13/src/runtime/pprof/pprof_test.go:607
            #	0x4f2038	testing.tRunner+0xc8			/home/x448/go1.13/src/testing/testing.go:909
            
        pprof_test.go:625: Bad select send sync entry, expect:
            
            [0-9]+ [0-9]+ @( 0x[[:xdigit:]]+)+
            #	0x[0-9a-f]+	runtime\.selectgo\+0x[0-9a-f]+	.*/src/runtime/select.go:[0-9]+
            #	0x[0-9a-f]+	runtime/pprof\.blockSelectSendSync\+0x[0-9a-f]+	.*/src/runtime/pprof/pprof_test.go:[0-9]+
            #	0x[0-9a-f]+	runtime/pprof\.TestBlockProfile\+0x[0-9a-f]+	.*/src/runtime/pprof/pprof_test.go:[0-9]+
            
            got:
            --- contention:
            cycles/second=3491926309
            35317032 1 @ 0x469ddd 0x597afb 0x596f35 0x4f2039 0x45d971
            #	0x469ddc	sync.(*Cond).Wait+0x9c			/home/x448/go1.13/src/sync/cond.go:56
            #	0x597afa	runtime/pprof.blockCond+0xba		/home/x448/go1.13/src/runtime/pprof/pprof_test.go:767
            #	0x596f34	runtime/pprof.TestBlockProfile+0x454	/home/x448/go1.13/src/runtime/pprof/pprof_test.go:607
            #	0x4f2038	testing.tRunner+0xc8			/home/x448/go1.13/src/testing/testing.go:909
            
        pprof_test.go:625: Bad mutex entry, expect:
            
            [0-9]+ [0-9]+ @( 0x[[:xdigit:]]+)+
            #	0x[0-9a-f]+	sync\.\(\*Mutex\)\.Lock\+0x[0-9a-f]+	.*/src/sync/mutex\.go:[0-9]+
            #	0x[0-9a-f]+	runtime/pprof\.blockMutex\+0x[0-9a-f]+	.*/src/runtime/pprof/pprof_test.go:[0-9]+
            #	0x[0-9a-f]+	runtime/pprof\.TestBlockProfile\+0x[0-9a-f]+	.*/src/runtime/pprof/pprof_test.go:[0-9]+
            
            got:
            --- contention:
            cycles/second=3491926309
            35317032 1 @ 0x469ddd 0x597afb 0x596f35 0x4f2039 0x45d971
            #	0x469ddc	sync.(*Cond).Wait+0x9c			/home/x448/go1.13/src/sync/cond.go:56
            #	0x597afa	runtime/pprof.blockCond+0xba		/home/x448/go1.13/src/runtime/pprof/pprof_test.go:767
            #	0x596f34	runtime/pprof.TestBlockProfile+0x454	/home/x448/go1.13/src/runtime/pprof/pprof_test.go:607
            #	0x4f2038	testing.tRunner+0xc8			/home/x448/go1.13/src/testing/testing.go:909
            
    --- FAIL: TestBlockProfile/proto (0.00s)
        pprof_test.go:638: parsed proto: PeriodType: contentions count
            Period: 1
            Time: 2020-01-15 23:11:58.218134259 -0600 CST
            Samples:
            contentions/count delay/nanoseconds
                      1   10113911: 1 2 3 4 
            Locations
                 1: 0x469ddc M=1 sync.(*Cond).Wait /home/x448/go1.13/src/sync/cond.go:56 s=0
                 2: 0x597afa M=1 runtime/pprof.blockCond /home/x448/go1.13/src/runtime/pprof/pprof_test.go:767 s=0
                 3: 0x596f34 M=1 runtime/pprof.TestBlockProfile /home/x448/go1.13/src/runtime/pprof/pprof_test.go:607 s=0
                 4: 0x4f2038 M=1 testing.tRunner /home/x448/go1.13/src/testing/testing.go:909 s=0
            Mappings
            1: 0x400000/0x5a5000/0x0 /tmp/go-build492500388/b942/pprof.test  [FN]
            2: 0x7ffd69925000/0x7ffd69927000/0x0 [vdso]  
            3: 0xffffffffff600000/0xffffffffff601000/0x0 [vsyscall]  
        pprof_test.go:646: No matching stack entry for chan recv, want [runtime.chanrecv1 runtime/pprof.blockChanRecv runtime/pprof.TestBlockProfile]
        pprof_test.go:646: No matching stack entry for chan send, want [runtime.chansend1 runtime/pprof.blockChanSend runtime/pprof.TestBlockProfile]
        pprof_test.go:646: No matching stack entry for chan close, want [runtime.chanrecv1 runtime/pprof.blockChanClose runtime/pprof.TestBlockProfile]
        pprof_test.go:646: No matching stack entry for select recv async, want [runtime.selectgo runtime/pprof.blockSelectRecvAsync runtime/pprof.TestBlockProfile]
        pprof_test.go:646: No matching stack entry for select send sync, want [runtime.selectgo runtime/pprof.blockSelectSendSync runtime/pprof.TestBlockProfile]
        pprof_test.go:646: No matching stack entry for mutex, want [sync.(*Mutex).Lock runtime/pprof.blockMutex runtime/pprof.TestBlockProfile]
FAIL
FAIL	runtime/pprof	4.709s

go version and go env after the build finished with above error:

x448@coding:~/go1.13/src> go version
go version go1.13.6 linux/amd64
x448@coding:~/go1.13/src> go env
GO111MODULE=""
GOARCH="amd64"
GOBIN=""
GOCACHE="/home/x448/.cache/go-build"
GOENV="/home/x448/.config/go/env"
GOEXE=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GONOPROXY=""
GONOSUMDB=""
GOOS="linux"
GOPATH="/home/x448/gocode1.13"
GOPRIVATE=""
GOPROXY="https://proxy.golang.org,direct"
GOROOT="/home/x448/go1.13"
GOSUMDB="sum.golang.org"
GOTMPDIR=""
GOTOOLDIR="/home/x448/go1.13/pkg/tool/linux_amd64"
GCCGO="gccgo"
AR="ar"
CC="gcc"
CXX="g++"
CGO_ENABLED="1"
GOMOD="/home/x448/go1.13/src/go.mod"
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -m64 -pthread -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build089455649=/tmp/go-build -gno-record-gcc-switches"
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