cmd/cgo/internal/testsanitizers: TestTSAN/tsan* failures

[gopherbot]

#!watchflakes
default <- pkg == "cmd/cgo/internal/testsanitizers" && test ~ `TestTSAN/tsan\d+`

Issue created automatically to collect these failures.

Example (log):

=== RUN   TestTSAN/tsan14
=== PAUSE TestTSAN/tsan14
=== CONT  TestTSAN/tsan14
    tsan_test.go:77: /home/swarming/.swarming/w/ir/x/t/TestTSAN1360052067/tsan14 exited with exit status 66
        ==================
        WARNING: ThreadSanitizer: signal handler spoils errno (pid=36513)
            #0 runtime.cgoSigtramp /home/swarming/.swarming/w/ir/x/w/goroot/src/runtime/sys_linux_amd64.s:388 (tsan14+0x513060)
            #1 _cgo_get_context_function <null> (tsan14+0x51a602)
            #2 _cgo_release_context <null> (tsan14+0x51a010)
            #3 go_callback <null> (tsan14+0x519d43)
        
        SUMMARY: ThreadSanitizer: signal handler spoils errno /home/swarming/.swarming/w/ir/x/w/goroot/src/runtime/sys_linux_amd64.s:388 in runtime.cgoSigtramp
        ==================
--- FAIL: TestTSAN/tsan14 (3.50s)

— watchflakes

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "cmd/cgo/internal/testsanitizers" && test == "TestTSAN/tsan14"

2024-04-19 16:08 gotip-linux-amd64-staticlockranking go@d428a638 cmd/cgo/internal/testsanitizers.TestTSAN/tsan14 (log)

=== RUN   TestTSAN/tsan14
=== PAUSE TestTSAN/tsan14
=== CONT  TestTSAN/tsan14
    tsan_test.go:77: /home/swarming/.swarming/w/ir/x/t/TestTSAN1360052067/tsan14 exited with exit status 66
        ==================
        WARNING: ThreadSanitizer: signal handler spoils errno (pid=36513)
            #0 runtime.cgoSigtramp /home/swarming/.swarming/w/ir/x/w/goroot/src/runtime/sys_linux_amd64.s:388 (tsan14+0x513060)
            #1 _cgo_get_context_function <null> (tsan14+0x51a602)
            #2 _cgo_release_context <null> (tsan14+0x51a010)
            #3 go_callback <null> (tsan14+0x519d43)
        
        SUMMARY: ThreadSanitizer: signal handler spoils errno /home/swarming/.swarming/w/ir/x/w/goroot/src/runtime/sys_linux_amd64.s:388 in runtime.cgoSigtramp
        ==================
--- FAIL: TestTSAN/tsan14 (3.50s)

2024-04-19 16:31 gotip-linux-amd64-boringcrypto go@1a0b8637 cmd/cgo/internal/testsanitizers.TestTSAN/tsan14 (log)

=== RUN   TestTSAN/tsan14
=== PAUSE TestTSAN/tsan14
=== CONT  TestTSAN/tsan14
    tsan_test.go:77: /home/swarming/.swarming/w/ir/x/t/TestTSAN322841745/tsan14 exited with exit status 66
        ==================
        WARNING: ThreadSanitizer: signal handler spoils errno (pid=41208)
            #0 runtime.cgoSigtramp /home/swarming/.swarming/w/ir/x/w/goroot/src/runtime/sys_linux_amd64.s:388 (tsan14+0x510d80)
            #1 _cgo_get_context_function <null> (tsan14+0x518322)
            #2 _cgo_release_context <null> (tsan14+0x517d30)
            #3 go_callback <null> (tsan14+0x517a63)
        
        SUMMARY: ThreadSanitizer: signal handler spoils errno /home/swarming/.swarming/w/ir/x/w/goroot/src/runtime/sys_linux_amd64.s:388 in runtime.cgoSigtramp
        ==================
--- FAIL: TestTSAN/tsan14 (3.33s)

2024-04-22 13:29 gotip-linux-amd64-boringcrypto go@2dddc7ef cmd/cgo/internal/testsanitizers.TestTSAN/tsan14 (log)

=== RUN   TestTSAN/tsan14
=== PAUSE TestTSAN/tsan14
=== CONT  TestTSAN/tsan14
    tsan_test.go:77: /home/swarming/.swarming/w/ir/x/t/TestTSAN1167938126/tsan14 exited with exit status 66
        ==================
        WARNING: ThreadSanitizer: signal handler spoils errno (pid=43478)
            #0 runtime.cgoSigtramp /home/swarming/.swarming/w/ir/x/w/goroot/src/runtime/sys_linux_amd64.s:388 (tsan14+0x510da0)
            #1 _cgo_wait_runtime_init_done <null> (tsan14+0x518011)
            #2 go_callback <null> (tsan14+0x517a33)
        
        SUMMARY: ThreadSanitizer: signal handler spoils errno /home/swarming/.swarming/w/ir/x/w/goroot/src/runtime/sys_linux_amd64.s:388 in runtime.cgoSigtramp
        ==================
--- FAIL: TestTSAN/tsan14 (3.06s)

2024-04-22 20:21 gotip-linux-amd64 go@6737f4ce cmd/cgo/internal/testsanitizers.TestTSAN/tsan14 (log)

=== RUN   TestTSAN/tsan14
=== PAUSE TestTSAN/tsan14
=== CONT  TestTSAN/tsan14
    tsan_test.go:77: /home/swarming/.swarming/w/ir/x/t/TestTSAN2314264949/tsan14 exited with exit status 66
        ==================
        WARNING: ThreadSanitizer: signal handler spoils errno (pid=45198)
            #0 runtime.cgoSigtramp /home/swarming/.swarming/w/ir/x/w/goroot/src/runtime/sys_linux_amd64.s:388 (tsan14+0x510e20)
            #1 _cgo_get_context_function <null> (tsan14+0x5183c2)
            #2 _cgo_release_context <null> (tsan14+0x517dd0)
            #3 go_callback <null> (tsan14+0x517b03)
        
        SUMMARY: ThreadSanitizer: signal handler spoils errno /home/swarming/.swarming/w/ir/x/w/goroot/src/runtime/sys_linux_amd64.s:388 in runtime.cgoSigtramp
        ==================
--- FAIL: TestTSAN/tsan14 (3.90s)

2024-04-23 16:49 gotip-linux-amd64-goamd64v3 go@08e73e61 cmd/cgo/internal/testsanitizers.TestTSAN/tsan14 (log)

=== RUN   TestTSAN/tsan14
=== PAUSE TestTSAN/tsan14
=== CONT  TestTSAN/tsan14
    tsan_test.go:77: /home/swarming/.swarming/w/ir/x/t/TestTSAN3886674001/tsan14 exited with exit status 66
        ==================
        WARNING: ThreadSanitizer: signal handler spoils errno (pid=269999)
            #0 runtime.cgoSigtramp /home/swarming/.swarming/w/ir/x/w/goroot/src/runtime/sys_linux_amd64.s:388 (tsan14+0x510940)
            #1 _cgo_wait_runtime_init_done <null> (tsan14+0x517b51)
            #2 go_callback <null> (tsan14+0x517573)
        
        SUMMARY: ThreadSanitizer: signal handler spoils errno /home/swarming/.swarming/w/ir/x/w/goroot/src/runtime/sys_linux_amd64.s:388 in runtime.cgoSigtramp
        ==================
--- FAIL: TestTSAN/tsan14 (2.77s)

2024-04-24 15:55 gotip-linux-amd64-boringcrypto go@508e7619 cmd/cgo/internal/testsanitizers.TestTSAN/tsan14 (log)

=== RUN   TestTSAN/tsan14
=== PAUSE TestTSAN/tsan14
=== CONT  TestTSAN/tsan14
    tsan_test.go:77: /home/swarming/.swarming/w/ir/x/t/TestTSAN974189749/tsan14 exited with exit status 66
        ==================
        WARNING: ThreadSanitizer: signal handler spoils errno (pid=38580)
            #0 runtime.cgoSigtramp /home/swarming/.swarming/w/ir/x/w/goroot/src/runtime/sys_linux_amd64.s:388 (tsan14+0x510e80)
            #1 _cgo_get_context_function <null> (tsan14+0x5183e2)
            #2 _cgo_release_context <null> (tsan14+0x517df0)
            #3 go_callback <null> (tsan14+0x517b23)
        
        SUMMARY: ThreadSanitizer: signal handler spoils errno /home/swarming/.swarming/w/ir/x/w/goroot/src/runtime/sys_linux_amd64.s:388 in runtime.cgoSigtramp
        ==================
--- FAIL: TestTSAN/tsan14 (3.07s)

2024-04-24 15:55 gotip-linux-amd64-goamd64v3 go@508e7619 cmd/cgo/internal/testsanitizers.TestTSAN/tsan14 (log)

=== RUN   TestTSAN/tsan14
=== PAUSE TestTSAN/tsan14
=== CONT  TestTSAN/tsan14
    tsan_test.go:77: /home/swarming/.swarming/w/ir/x/t/TestTSAN2446667033/tsan14 exited with exit status 66
        ==================
        WARNING: ThreadSanitizer: signal handler spoils errno (pid=97922)
            #0 runtime.cgoSigtramp /home/swarming/.swarming/w/ir/x/w/goroot/src/runtime/sys_linux_amd64.s:388 (tsan14+0x510940)
            #1 _cgo_wait_runtime_init_done <null> (tsan14+0x517b51)
            #2 go_callback <null> (tsan14+0x517573)
        
        SUMMARY: ThreadSanitizer: signal handler spoils errno /home/swarming/.swarming/w/ir/x/w/goroot/src/runtime/sys_linux_amd64.s:388 in runtime.cgoSigtramp
        ==================
--- FAIL: TestTSAN/tsan14 (3.82s)

2024-04-25 01:02 gotip-linux-amd64-goamd64v3 go@4351af68 cmd/cgo/internal/testsanitizers.TestTSAN/tsan14 (log)

=== RUN   TestTSAN/tsan14
=== PAUSE TestTSAN/tsan14
=== CONT  TestTSAN/tsan14
    tsan_test.go:77: /home/swarming/.swarming/w/ir/x/t/TestTSAN1143881792/tsan14 exited with exit status 66
        ==================
        WARNING: ThreadSanitizer: signal handler spoils errno (pid=286537)
            #0 runtime.cgoSigtramp /home/swarming/.swarming/w/ir/x/w/goroot/src/runtime/sys_linux_amd64.s:388 (tsan14+0x510940)
            #1 _cgo_wait_runtime_init_done <null> (tsan14+0x517b51)
            #2 go_callback <null> (tsan14+0x517573)
        
        SUMMARY: ThreadSanitizer: signal handler spoils errno /home/swarming/.swarming/w/ir/x/w/goroot/src/runtime/sys_linux_amd64.s:388 in runtime.cgoSigtramp
        ==================
--- FAIL: TestTSAN/tsan14 (3.89s)

2024-04-26 21:24 gotip-linux-amd64-staticlockranking go@0e7f5cf3 cmd/cgo/internal/testsanitizers.TestTSAN/tsan14 (log)

=== RUN   TestTSAN/tsan14
=== PAUSE TestTSAN/tsan14
=== CONT  TestTSAN/tsan14
    tsan_test.go:77: /home/swarming/.swarming/w/ir/x/t/TestTSAN2489155201/tsan14 exited with exit status 66
        ==================
        WARNING: ThreadSanitizer: signal handler spoils errno (pid=37051)
            #0 runtime.cgoSigtramp /home/swarming/.swarming/w/ir/x/w/goroot/src/runtime/sys_linux_amd64.s:388 (tsan14+0x5129c0)
            #1 _cgo_get_context_function <null> (tsan14+0x519ec2)
            #2 _cgo_release_context <null> (tsan14+0x5198d0)
            #3 go_callback <null> (tsan14+0x519603)
        
        SUMMARY: ThreadSanitizer: signal handler spoils errno /home/swarming/.swarming/w/ir/x/w/goroot/src/runtime/sys_linux_amd64.s:388 in runtime.cgoSigtramp
        ==================
--- FAIL: TestTSAN/tsan14 (3.68s)

2024-04-26 23:07 gotip-linux-amd64-newinliner go@ad22356e cmd/cgo/internal/testsanitizers.TestTSAN/tsan14 (log)

=== RUN   TestTSAN/tsan14
=== PAUSE TestTSAN/tsan14
=== CONT  TestTSAN/tsan14
    tsan_test.go:77: /home/swarming/.swarming/w/ir/x/t/TestTSAN1452582374/tsan14 exited with exit status 66
        ==================
        WARNING: ThreadSanitizer: signal handler spoils errno (pid=183093)
            #0 runtime.cgoSigtramp /home/swarming/.swarming/w/ir/x/w/goroot/src/runtime/sys_linux_amd64.s:388 (tsan14+0x5107a0)
            #1 _cgo_wait_runtime_init_done <null> (tsan14+0x517a11)
            #2 go_callback <null> (tsan14+0x517433)
        
        SUMMARY: ThreadSanitizer: signal handler spoils errno /home/swarming/.swarming/w/ir/x/w/goroot/src/runtime/sys_linux_amd64.s:388 in runtime.cgoSigtramp
        ==================
--- FAIL: TestTSAN/tsan14 (4.10s)

2024-04-29 14:01 gotip-linux-amd64-newinliner go@f6e6b637 cmd/cgo/internal/testsanitizers.TestTSAN/tsan14 (log)

=== RUN   TestTSAN/tsan14
=== PAUSE TestTSAN/tsan14
=== CONT  TestTSAN/tsan14
    tsan_test.go:77: /home/swarming/.swarming/w/ir/x/t/TestTSAN1529121168/tsan14 exited with exit status 66
        ==================
        WARNING: ThreadSanitizer: signal handler spoils errno (pid=88729)
            #0 runtime.cgoSigtramp /home/swarming/.swarming/w/ir/x/w/goroot/src/runtime/sys_linux_amd64.s:388 (tsan14+0x5107a0)
            #1 _cgo_wait_runtime_init_done <null> (tsan14+0x517a11)
            #2 go_callback <null> (tsan14+0x517433)
        
        SUMMARY: ThreadSanitizer: signal handler spoils errno /home/swarming/.swarming/w/ir/x/w/goroot/src/runtime/sys_linux_amd64.s:388 in runtime.cgoSigtramp
        ==================
--- FAIL: TestTSAN/tsan14 (3.68s)

2024-05-04 07:50 gotip-linux-amd64 go@8841f50d cmd/cgo/internal/testsanitizers.TestTSAN/tsan14 (log)

=== RUN   TestTSAN/tsan14
=== PAUSE TestTSAN/tsan14
=== CONT  TestTSAN/tsan14
    tsan_test.go:77: /home/swarming/.swarming/w/ir/x/t/TestTSAN618518940/tsan14 exited with exit status 66
        ==================
        WARNING: ThreadSanitizer: signal handler spoils errno (pid=38752)
            #0 runtime.cgoSigtramp /home/swarming/.swarming/w/ir/x/w/goroot/src/runtime/sys_linux_amd64.s:388 (tsan14+0x5107c0)
            #1 _cgo_get_context_function <null> (tsan14+0x517ca2)
            #2 _cgo_release_context <null> (tsan14+0x5176b0)
            #3 go_callback <null> (tsan14+0x5173e3)
        
        SUMMARY: ThreadSanitizer: signal handler spoils errno /home/swarming/.swarming/w/ir/x/w/goroot/src/runtime/sys_linux_amd64.s:388 in runtime.cgoSigtramp
        ==================
--- FAIL: TestTSAN/tsan14 (3.33s)

— watchflakes

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "cmd/cgo/internal/testsanitizers" && test ~ `TestTSAN/tsan\d+`

2024-11-20 16:48 gotip-linux-arm64-clang15 go@88375032 cmd/cgo/internal/testsanitizers.TestTSAN/tsan13 (log)

=== RUN   TestTSAN/tsan13
=== PAUSE TestTSAN/tsan13
=== CONT  TestTSAN/tsan13
    tsan_test.go:88: /usr/bin/setarch aarch64 -R /home/swarming/.swarming/w/ir/x/t/TestTSAN4122718467/tsan13 exited with exit status 2
        SIGQUIT: quit
        PC=0x53e160 m=2 sigcode=0
        
        goroutine 0 gp=0xffffa8004a80 m=2 mp=0xffffa8058808 [idle]:
        runtime.futex(0x53a730, 0x80, 0x0, 0x1b14828, 0xffffac8fdec8, 0x53cb38)
        	/home/swarming/.swarming/w/ir/x/w/goroot/src/runtime/sys_linux_arm64.s:652 +0x20 fp=0xffffac8fde90 sp=0xffffac8fde90 pc=0x53e160
...
        r25     0xc0
        r26     0x5cd090
        r27     0x6b6000
        r28     0xffffa8004a80
        r29     0xffffac8fde88
        lr      0x50013c
        sp      0xffffac8fde90
        pc      0x53e160
        fault   0x0
--- FAIL: TestTSAN/tsan13 (136.85s)

— watchflakes

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "cmd/cgo/internal/testsanitizers" && test ~ `TestTSAN/tsan\d+`

2025-07-23 18:17 go1.25-linux-riscv64 release-branch.go1.25@489868f7 cmd/cgo/internal/testsanitizers.TestTSAN/tsan13 (log)

=== RUN   TestTSAN/tsan13
=== PAUSE TestTSAN/tsan13
=== CONT  TestTSAN/tsan13
    tsan_test.go:70: /home/swarming/.swarming/w/ir/x/w/goroot/bin/go build -x --installsuffix=tsan -o /home/swarming/.swarming/w/ir/x/t/TestTSANtsan131263144629/001/tsan13 ./testdata/tsan13.go exited with exit status 2
        WORK=/home/swarming/.swarming/w/ir/x/t/go-build4294318762
        mkdir -p $WORK/b001/
        cd /home/swarming/.swarming/w/ir/x/w/goroot/src/cmd/cgo/internal/testsanitizers/testdata
        TERM='dumb' CGO_LDFLAGS='' /home/swarming/.swarming/w/ir/x/w/goroot/pkg/tool/linux_riscv64/cgo -objdir $WORK/b001/ -importpath command-line-arguments "-ldflags=\"-fsanitize=thread\" \"-fPIC\" \"-static-libtsan\" \"-g\" \"-fsanitize=thread\"" -- -I $WORK/b001/ -fsanitize=thread -fPIC -g -fsanitize=thread ./tsan13.go
        cd $WORK/b001
        TERM='dumb' gcc -I /home/swarming/.swarming/w/ir/x/w/goroot/src/cmd/cgo/internal/testsanitizers/testdata -fPIC -pthread -Wl,--no-gc-sections -fmessage-length=0 -ffile-prefix-map=$WORK/b001=/tmp/go-build -gno-record-gcc-switches -I $WORK/b001/ -fsanitize=thread -fPIC -g -fsanitize=thread -frandom-seed=SpOkbQVFHPDYhYjQbzL_ -o $WORK/b001/_x001.o -c _cgo_export.c
...
        a5  0x0	a6  0x0
        a7  0x62	s2  0x3fc49f5788
        s3  0xc8f500	s4  0x3760006000
        s5  0x4	s6  0x0
        s7  0x4	s8  0x3760044178
        s9  0x376004c4e0	s10 0x786680
        s11 0xc8d6c0	t3  0x0
        t4  0x0	t5  0x0
        t6  0xc91538	pc  0x9297c
--- FAIL: TestTSAN/tsan13 (162.92s)

— watchflakes

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "cmd/cgo/internal/testsanitizers" && test ~ `TestTSAN/tsan\d+`

2025-11-25 01:02 gotip-linux-arm64-longtest go@1a53ce97 cmd/cgo/internal/testsanitizers.TestTSAN/tsan11 (log)

=== RUN   TestTSAN/tsan11
=== PAUSE TestTSAN/tsan11
=== CONT  TestTSAN/tsan11
    tsan_test.go:96: /usr/bin/setarch aarch64 -R /home/swarming/.swarming/w/ir/x/t/TestTSANtsan113013560838/001/tsan11 exited with exit status 2
        SIGQUIT: quit
        PC=0x541c40 m=2 sigcode=0
        
        goroutine 0 gp=0xffffab3e0a80 m=2 mp=0xffffab432808 [idle]:
        runtime.futex(0x54eab4, 0xad2cfbc0, 0xffff, 0x540000, 0xffffad2ce938, 0x540a28)
        	/home/swarming/.swarming/w/ir/x/w/goroot/src/runtime/sys_linux_arm64.s:652 +0x20 fp=0xffffad2ce900 sp=0xffffad2ce900 pc=0x541c40
...
        r25     0x1
        r26     0x58ae40
        r27     0x666000
        r28     0xffffab3e0a80
        r29     0xffffad2ce8f8
        lr      0x504dcc
        sp      0xffffad2ce900
        pc      0x541c40
        fault   0x0
--- FAIL: TestTSAN/tsan11 (764.51s)

2025-11-26 20:22 gotip-linux-arm64-asan-clang15 go@fb5156a0 cmd/cgo/internal/testsanitizers.TestTSAN/tsan13 (log)

=== RUN   TestTSAN/tsan13
=== PAUSE TestTSAN/tsan13
=== CONT  TestTSAN/tsan13
    tsan_test.go:96: /usr/bin/setarch aarch64 -R /home/swarming/.swarming/w/ir/x/t/TestTSANtsan133860431061/001/tsan13 exited with exit status 2
        SIGQUIT: quit
        PC=0x55d350 m=2 sigcode=0
        
        goroutine 0 gp=0xffffa84caa80 m=2 mp=0xffffa851c808 [idle]:
        runtime.futex(0x55a070, 0x80, 0x0, 0x1b47598, 0xffffac9fdeb8, 0x55c118)
        	/home/swarming/.swarming/w/ir/x/w/goroot/src/runtime/sys_linux_arm64.s:652 +0x20 fp=0xffffac9fde80 sp=0xffffac9fde80 pc=0x55d350
...
        r25     0xc0
        r26     0x5e2330
        r27     0x6e6000
        r28     0xffffa84caa80
        r29     0xffffac9fde78
        lr      0x52048c
        sp      0xffffac9fde80
        pc      0x55d350
        fault   0x0
--- FAIL: TestTSAN/tsan13 (912.84s)

— watchflakes

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "cmd/cgo/internal/testsanitizers" && test ~ `TestTSAN/tsan\d+`

2026-02-04 20:19 gotip-linux-arm64-asan-clang15 go@044fe174 cmd/cgo/internal/testsanitizers.TestTSAN/tsan13 (log)

=== RUN   TestTSAN/tsan13
=== PAUSE TestTSAN/tsan13
=== CONT  TestTSAN/tsan13
    tsan_test.go:96: /usr/bin/setarch aarch64 -R /home/swarming/.swarming/w/ir/x/t/TestTSANtsan131843982961/001/tsan13 exited with exit status 2
        SIGQUIT: quit
        PC=0x54e7d0 m=2 sigcode=0
        
        goroutine 0 gp=0xffffa9980b40 m=2 mp=0xffffa99d2808 [idle]:
        runtime.futex(0x54b4e0, 0x80, 0x0, 0x1b25740, 0xffffac9fdeb8, 0x54d594)
        	/home/swarming/.swarming/w/ir/x/w/goroot/src/runtime/sys_linux_arm64.s:666 +0x20 fp=0xffffac9fde80 sp=0xffffac9fde80 pc=0x54e7d0
...
        r25     0xc0
        r26     0x68a3d0
        r27     0x6c6000
        r28     0xffffa9980b40
        r29     0xffffac9fde78
        lr      0x51151c
        sp      0xffffac9fde80
        pc      0x54e7d0
        fault   0x0
--- FAIL: TestTSAN/tsan13 (918.18s)

— watchflakes

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "cmd/cgo/internal/testsanitizers" && test ~ `TestTSAN/tsan\d+`

2026-03-06 18:28 gotip-linux-arm64-nogreenteagc go@e7a09d1f cmd/cgo/internal/testsanitizers.TestTSAN/tsan11 (log)

=== RUN   TestTSAN/tsan11
=== PAUSE TestTSAN/tsan11
=== CONT  TestTSAN/tsan11
    tsan_test.go:95: /usr/bin/setarch aarch64 -R /home/swarming/.swarming/w/ir/x/t/TestTSANtsan1131222116/001/tsan11 exited with exit status 2
        SIGQUIT: quit
        PC=0x533cc0 m=2 sigcode=0
        
        goroutine 0 gp=0xffffacb9cb40 m=2 mp=0xffffacbe6808 [idle]:
        runtime.futex(0x54104c, 0xa95cfbc0, 0xffff, 0x540000, 0xffffa95ce938, 0x532a74)
        	/home/swarming/.swarming/w/ir/x/w/goroot/src/runtime/sys_linux_arm64.s:666 +0x20 fp=0xffffa95ce900 sp=0xffffa95ce900 pc=0x533cc0
...
        r25     0x1
        r26     0x60ab90
        r27     0x646b28
        r28     0xffffacb9cb40
        r29     0xffffa95ce8f8
        lr      0x4f4f3c
        sp      0xffffa95ce900
        pc      0x533cc0
        fault   0x0
--- FAIL: TestTSAN/tsan11 (122.92s)

— watchflakes