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runtime: sweep increased allocation count #19473

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reusee opened this issue Mar 9, 2017 · 11 comments

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@reusee
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commented Mar 9, 2017

What did you do?

ran a data-collecting program

What did you expect to see?

no crash

What did you see instead?

crash

runtime: nelems=85 nalloc=6 previous allocCount=5 nfreed=65535
fatal error:      
sweep increased allocation count

runtime stack:
runtime.throw(0x8e319b, 0x20)
	/home/reus/go/src/runtime/panic.go:596 +0x95
runtime.(*mspan).sweep(0x7fb1d81add18, 0x0, 0xc420000f00)
	/home/reus/go/src/runtime/mgcsweep.go:286 +0x8fa
runtime.sweepone(0x432386)
	/home/reus/go/src/runtime/mgcsweep.go:110 +0x1b6
runtime.gosweepone.func1()
	/home/reus/go/src/runtime/mgcsweep.go:125 +0x2b
runtime.systemstack(0xc42001c000)
	/home/reus/go/src/runtime/asm_amd64.s:327 +0x79
runtime.mstart()
	/home/reus/go/src/runtime/proc.go:1119

goroutine 3 [running]:
runtime.systemstack_switch()
	/home/reus/go/src/runtime/asm_amd64.s:281 fp=0xc420026f70 sp=0xc420026f68
runtime.gosweepone(0x0)
	/home/reus/go/src/runtime/mgcsweep.go:124 +0x53 fp=0xc420026fa0 sp=0xc420026f70
runtime.bgsweep(0xc420054000)
	/home/reus/go/src/runtime/mgcsweep.go:59 +0xb4 fp=0xc420026fd8 sp=0xc420026fa0
runtime.goexit()
	/home/reus/go/src/runtime/asm_amd64.s:2142 +0x1 fp=0xc420026fe0 sp=0xc420026fd8
created by runtime.gcenable
	/home/reus/go/src/runtime/mgc.go:212 +0x61


System details

go version devel +2bd6360e3b Wed Mar 8 03:24:44 2017 +0000 linux/amd64
GOARCH="amd64"
GOBIN=""
GOEXE=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOOS="linux"
GOPATH="/home/reus"
GORACE=""
GOROOT="/home/reus/go"
GOTOOLDIR="/home/reus/go/pkg/tool/linux_amd64"
GCCGO="gccgo"
CC="gcc"
GOGCCFLAGS="-fPIC -m64 -pthread -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build839785292=/tmp/go-build -gno-record-gcc-switches"
CXX="g++"
CGO_ENABLED="1"
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOROOT/bin/go version: go version devel +2bd6360e3b Wed Mar 8 03:24:44 2017 +0000 linux/amd64
GOROOT/bin/go tool compile -V: compile version devel +2bd6360e3b Wed Mar 8 03:24:44 2017 +0000 X:framepointer
uname -sr: Linux 4.9.11-1-ARCH
/usr/lib/libc.so.6: GNU C Library (GNU libc) stable release version 2.24, by Roland McGrath et al.
gdb --version: GNU gdb (GDB) 7.12.1
@reusee

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commented Mar 9, 2017

> env GODEBUG=gccheckmark=1 GOTRACEBACK=crash GOGC=1 ./lalaworker all

runtime: marking free object 0xc420c28900 found at *(0xc420491790+0x18)
base=0xc420491790 k=0x6210248 s.base()=0xc42048a000 s.limit=0xc420492000 s.sizeclass=66 s.elemsize=32768 s.state=_MSpanStack
 *(base+0) = 0xc42049c380
 *(base+8) = 0xb334e0
 *(base+16) = 0xc4200141c0
 *(base+24) = 0xc420c28900 <==
 *(base+32) = 0xc42066ce01
 *(base+40) = 0x0
 *(base+48) = 0x459991
 *(base+56) = 0xc42049c380
 *(base+64) = 0xb39760
 *(base+72) = 0xc4202b0040
 *(base+80) = 0x2020202020202020
 *(base+88) = 0x2020202020202020
 *(base+96) = 0x2020202020202020
 *(base+104) = 0x20676d693c202020
 *(base+112) = 0xc42048a800
 *(base+120) = 0x2e676d692f2f3a70
 *(base+128) = 0x6d6f632e63697676
 *(base+136) = 0x343635643362342f
 *(base+144) = 0x6132336335383433
 *(base+152) = 0x3237656436346435
 *(base+160) = 0x3066346630633932
 *(base+168) = 0x34314067706a2e31
 *(base+176) = 0x2d3030362d302d36
 *(base+184) = 0x3036327c61303039
 *(base+192) = 0x2022683039335f77
 *(base+200) = 0xd3e22223d746c61
 *(base+208) = 0x202020202020200a
 *(base+216) = 0x2020202020202020
 *(base+224) = 0x2020202020202020
 *(base+232) = 0x2020202020202020
 *(base+240) = 0x63206e6170733c20
 *(base+248) = 0x6e69223d7373616c
 *(base+256) = 0x6c79747320226f66
 *(base+264) = 0x2d74786574223d65
 *(base+272) = 0x65633a6e67696c61
 *(base+280) = 0xd3e223b7265746e
 *(base+288) = 0x202020202020200a
 *(base+296) = 0x2020202020202020
 *(base+304) = 0x2020202020202020
 *(base+312) = 0x2020202020202020
 *(base+320) = 0x70733c2020202020
 *(base+328) = 0x7373616c63206e61
 *(base+336) = 0x625f6f666e69223d
 *(base+344) = 0x6170732f3c3e2267
 *(base+352) = 0x202020200a0d3e6e
 *(base+360) = 0x2020202020202020
 *(base+368) = 0x2020202020202020
 *(base+376) = 0x2020202020202020
 *(base+384) = 0x2020202020202020
 *(base+392) = 0x2020202020200a0d
 *(base+400) = 0x2020202020202020
 *(base+408) = 0x2020202020202020
 *(base+416) = 0x2020202020202020
 *(base+424) = 0x2020202020202020
 *(base+432) = 0x202020200a0d2020
 *(base+440) = 0x2020202020202020
 *(base+448) = 0x2020202020202020
 *(base+456) = 0x2020202020202020
 *(base+464) = 0x2020202020202020
 *(base+472) = 0x2020202020202020
 *(base+480) = 0x6c63206e6170733c
 *(base+488) = 0x697270223d737361
 *(base+496) = 0x6170733c3e226563
 *(base+504) = 0x3d7373616c63206e
 *(base+512) = 0xc23e226e61757922
 *(base+520) = 0x3e6e6170732f3ca5
 *(base+528) = 0x732f3c30302e3333
 *(base+536) = 0x20200a0d3e6e6170
 *(base+544) = 0x2020202020202020
 *(base+552) = 0x2020202020202020
 *(base+560) = 0x2020202020202020
 *(base+568) = 0x2020202020202020
 *(base+576) = 0xa0d202020202020
 *(base+584) = 0x2020202020202020
 *(base+592) = 0x2020202020202020
 *(base+600) = 0x2020202020202020
 *(base+608) = 0x2020202020202020
 *(base+616) = 0x2020202020202020
 *(base+624) = 0x2020202020200a0d
 *(base+632) = 0x2020202020202020
 *(base+640) = 0x2020202020202020
 *(base+648) = 0x2020202020202020
 *(base+656) = 0x2020202020202020
 *(base+664) = 0x202020200a0d2020
 *(base+672) = 0x2020202020202020
 *(base+680) = 0x2020202020202020
 *(base+688) = 0x2020202020202020
 *(base+696) = 0x2020202020202020
 *(base+704) = 0x2020202020200a0d
 *(base+712) = 0x2020202020202020
 *(base+720) = 0x2020202020202020
 *(base+728) = 0x2020202020202020
 *(base+736) = 0x6e6170732f3c2020
 *(base+744) = 0x20202020200a0d3e
 *(base+752) = 0x2020202020202020
 *(base+760) = 0x2020202020202020
 *(base+768) = 0x3c20202020202020
 *(base+776) = 0x2020200a0d3e612f
 *(base+784) = 0x2020202020202020
 *(base+792) = 0x2020202020202020
 *(base+800) = 0x200a0d2020202020
 *(base+808) = 0x2020202020202020
 *(base+816) = 0x2020202020202020
 *(base+824) = 0x2020200a0d202020
 *(base+832) = 0x2020202020202020
 *(base+840) = 0x200a0d2020202020
 *(base+848) = 0x2020202020202020
 *(base+856) = 0x2020202020202020
 *(base+864) = 0x2020200a0d202020
 *(base+872) = 0x2020202020202020
 *(base+880) = 0x2020202020202020
 *(base+888) = 0x200a0d2020202020
 *(base+896) = 0x2020202020202020
 *(base+904) = 0x2020202020202020
 *(base+912) = 0xd20202020202020
 *(base+920) = 0x202020202020200a
 *(base+928) = 0x2020202020202020
 *(base+936) = 0x2020202020202020
 *(base+944) = 0x20613c2020202020
 *(base+952) = 0x692f223d66657268
 *(base+960) = 0x393338332f6d6574
 *(base+968) = 0x616c632022333734
 *(base+976) = 0x6d657469223d7373
 *(base+984) = 0x69206164762d6a20
 *(base+992) = 0xa0d226564696873
 *(base+1000) = 0x2020202020202020
 *(base+1008) = 0x2020202020202020
 *(base+1016) = 0x2020202020202020
 ...
obj=0xc420c28900 k=0x6210614 s.base()=0xc420c28000 s.limit=0xc420c2a000 s.sizeclass=9 s.elemsize=128 s.state=_MSpanInUse
 *(obj+0) = 0x6fc23ac00
 *(obj+8) = 0x0
 *(obj+16) = 0x0
 *(obj+24) = 0x0
 *(obj+32) = 0x0
 *(obj+40) = 0x0
 *(obj+48) = 0x1
 *(obj+56) = 0x0
 *(obj+64) = 0x6fc23ac00
 *(obj+72) = 0x0
 *(obj+80) = 0x0
 *(obj+88) = 0x8d07b1
 *(obj+96) = 0x3
 *(obj+104) = 0xc42053d2c0
 *(obj+112) = 0xf
 *(obj+120) = 0x0
fatal error: marking free object

runtime stack:
runtime.throw(0x8db759, 0x13)
	/home/reus/go/src/runtime/panic.go:596 +0x95 fp=0x7f1e37ffe7c0 sp=0x7f1e37ffe7a0
runtime.greyobject(0xc420c28900, 0xc420491790, 0x18, 0xc41ff9ebb7, 0xc400000000, 0x7f1e51e6fd48, 0xc42001d228, 0x12)
	/home/reus/go/src/runtime/mgcmark.go:1249 +0x4c4 fp=0x7f1e37ffe7f0 sp=0x7f1e37ffe7c0
runtime.scanblock(0xc420491790, 0x28, 0x8f9dcd, 0xc42001d228)
	/home/reus/go/src/runtime/mgcmark.go:1080 +0x160 fp=0x7f1e37ffe868 sp=0x7f1e37ffe7f0
runtime.scanframeworker(0x7f1e37ffeb40, 0x7f1e37ffec18, 0xc42001d228)
	/home/reus/go/src/runtime/mgcmark.go:851 +0x10a fp=0x7f1e37ffe908 sp=0x7f1e37ffe868
runtime.scanstack.func1(0x7f1e37ffeb40, 0x0, 0xb408a0)
	/home/reus/go/src/runtime/mgcmark.go:774 +0x3d fp=0x7f1e37ffe930 sp=0x7f1e37ffe908
runtime.gentraceback(0xffffffffffffffff, 0xffffffffffffffff, 0x0, 0xc420543380, 0x0, 0x0, 0x7fffffff, 0x7f1e37ffed18, 0x0, 0x0, ...)
	/home/reus/go/src/runtime/traceback.go:330 +0x110f fp=0x7f1e37ffeba8 sp=0x7f1e37ffe930
runtime.scanstack(0xc420543380, 0xc42001d228)
	/home/reus/go/src/runtime/mgcmark.go:777 +0x154 fp=0x7f1e37ffed40 sp=0x7f1e37ffeba8
runtime.scang(0xc420543380, 0xc42001d228)
	/home/reus/go/src/runtime/proc.go:853 +0x203 fp=0x7f1e37ffed90 sp=0x7f1e37ffed40
runtime.markroot.func1()
	/home/reus/go/src/runtime/mgcmark.go:264 +0x77 fp=0x7f1e37ffedd0 sp=0x7f1e37ffed90
runtime.systemstack(0x7f1e37ffee30)
	/home/reus/go/src/runtime/asm_amd64.s:343 +0xab fp=0x7f1e37ffedd8 sp=0x7f1e37ffedd0
runtime.markroot(0xc42001d228, 0xcf)
	/home/reus/go/src/runtime/mgcmark.go:245 +0x2f4 fp=0x7f1e37ffee58 sp=0x7f1e37ffedd8
runtime.gcDrain(0xc42001d228, 0x6)
	/home/reus/go/src/runtime/mgcmark.go:910 +0xbe fp=0x7f1e37ffee90 sp=0x7f1e37ffee58
runtime.gcBgMarkWorker.func2()
	/home/reus/go/src/runtime/mgc.go:1505 +0xfa fp=0x7f1e37ffeec0 sp=0x7f1e37ffee90
runtime.systemstack(0xc42001f900)
	/home/reus/go/src/runtime/asm_amd64.s:327 +0x79 fp=0x7f1e37ffeec8 sp=0x7f1e37ffeec0
runtime.mstart()
	/home/reus/go/src/runtime/proc.go:1119 fp=0x7f1e37ffeed0 sp=0x7f1e37ffeec8

goroutine 18 [GC worker (idle)]:
runtime.systemstack_switch()
	/home/reus/go/src/runtime/asm_amd64.s:281 fp=0xc420022748 sp=0xc420022740
runtime.gcBgMarkWorker(0xc42001c000)
	/home/reus/go/src/runtime/mgc.go:1492 +0x20a fp=0xc4200227d8 sp=0xc420022748
runtime.goexit()
	/home/reus/go/src/runtime/asm_amd64.s:2142 +0x1 fp=0xc4200227e0 sp=0xc4200227d8
created by runtime.gcBgMarkStartWorkers
	/home/reus/go/src/runtime/mgc.go:1387 +0x7e


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commented Mar 9, 2017

The following program can reproduce the issue:

package main

import (
	"github.com/jmoiron/sqlx"
	_ "github.com/lib/pq"
	"sync"
)

func main() {
	db, err := sqlx.Connect("postgres", "user=reus dbname=reus sslmode=disable")
	if err != nil {
		panic(err)
	}
	defer db.Close()

	const N = 10000

	wg := new(sync.WaitGroup)
	wg.Add(N)
	sem := make(chan bool, 4)
	for i := 0; i < N; i++ {
		sem <- true
		go func() {

			defer func() {
				<-sem
				wg.Done()
			}()

			tx := db.MustBegin()

			var text string
			err := tx.Get(&text, `INSERT INTO foo (foo) VALUES ($1) RETURNING foo`, "FOO")
			if err != nil {
				panic(err)
			}

			err = tx.Commit()
			if err != nil {
				panic(err)
			}

		}()
	}

	wg.Wait()
}

run with:

env GODEBUG=gccheckmark=1 GOTRACEBACK=crash GOGC=1 ./a

crash:

runtime:greyobject: checkmarks finds unexpected unmarked object obj=0xc4200d8100
runtime: found obj at *(0xc4200d0f90+0x18)
base=0xc4200d0f90 k=0x6210068 s.base()=0xc4200ca000 s.limit=0x0 s.sizeclass=0 s.elemsize=0 s.state=_MSpanStack
 *(base+0) = 0xc420088280
 *(base+8) = 0x7368e0
 *(base+16) = 0xc420070160
 *(base+24) = 0xc4200d8100 <==
obj=0xc4200d8100 k=0x621006c s.base()=0xc4200d8000 s.limit=0xc4200da000 s.sizeclass=9 s.elemsize=128 s.state=_MSpanInUse
 *(obj+0) = 0xc4200900a0
 *(obj+8) = 0x0
 *(obj+16) = 0x0
 *(obj+24) = 0x0
 *(obj+32) = 0x0
 *(obj+40) = 0x0
 *(obj+48) = 0x0
 *(obj+56) = 0x1
 *(obj+64) = 0x0
 *(obj+72) = 0x0
 *(obj+80) = 0x0
 *(obj+88) = 0x0
 *(obj+96) = 0xc420070920
 *(obj+104) = 0x7397e0
 *(obj+112) = 0xc42009a4c0
 *(obj+120) = 0x0
fatal error: checkmark found unmarked object

runtime stack:
runtime.throw(0x638d93, 0x1f)
	/home/reus/go/src/runtime/panic.go:596 +0x95 fp=0x7fed9ab216f8 sp=0x7fed9ab216d8
runtime.greyobject(0xc4200d8100, 0xc4200d0f90, 0x18, 0xc41fff93f7, 0xc400000000, 0x7fed9c289140, 0xc42001d828, 0x2)
	/home/reus/go/src/runtime/mgcmark.go:1234 +0x324 fp=0x7fed9ab21728 sp=0x7fed9ab216f8
runtime.scanblock(0xc4200d0f90, 0x28, 0x6445a1, 0xc42001d828)
	/home/reus/go/src/runtime/mgcmark.go:1080 +0x160 fp=0x7fed9ab217a0 sp=0x7fed9ab21728
runtime.scanframeworker(0x7fed9ab21a78, 0x7fed9ab21b50, 0xc42001d828)
	/home/reus/go/src/runtime/mgcmark.go:851 +0x10a fp=0x7fed9ab21840 sp=0x7fed9ab217a0
runtime.scanstack.func1(0x7fed9ab21a78, 0x0, 0x73ee00)
	/home/reus/go/src/runtime/mgcmark.go:774 +0x3d fp=0x7fed9ab21868 sp=0x7fed9ab21840
runtime.gentraceback(0xffffffffffffffff, 0xffffffffffffffff, 0x0, 0xc420057c80, 0x0, 0x0, 0x7fffffff, 0x7fed9ab21c50, 0x0, 0x0, ...)
	/home/reus/go/src/runtime/traceback.go:330 +0x110f fp=0x7fed9ab21ae0 sp=0x7fed9ab21868
runtime.scanstack(0xc420057c80, 0xc42001d828)
	/home/reus/go/src/runtime/mgcmark.go:777 +0x154 fp=0x7fed9ab21c78 sp=0x7fed9ab21ae0
runtime.scang(0xc420057c80, 0xc42001d828)
	/home/reus/go/src/runtime/proc.go:853 +0x203 fp=0x7fed9ab21cc8 sp=0x7fed9ab21c78
runtime.markroot.func1()
	/home/reus/go/src/runtime/mgcmark.go:264 +0x77 fp=0x7fed9ab21d08 sp=0x7fed9ab21cc8
runtime.systemstack(0x7fed9ab21d68)
	/home/reus/go/src/runtime/asm_amd64.s:343 +0xab fp=0x7fed9ab21d10 sp=0x7fed9ab21d08
runtime.markroot(0xc42001d828, 0x7fed0000001e)
	/home/reus/go/src/runtime/mgcmark.go:245 +0x2f4 fp=0x7fed9ab21d90 sp=0x7fed9ab21d10
runtime.gcDrain(0xc42001d828, 0x0)
	/home/reus/go/src/runtime/mgcmark.go:910 +0xbe fp=0x7fed9ab21dc8 sp=0x7fed9ab21d90
runtime.gchelper()
	/home/reus/go/src/runtime/mgc.go:1875 +0x98 fp=0x7fed9ab21df8 sp=0x7fed9ab21dc8
runtime.stopm()
	/home/reus/go/src/runtime/proc.go:1639 +0xdd fp=0x7fed9ab21e20 sp=0x7fed9ab21df8
runtime.gcstopm()
	/home/reus/go/src/runtime/proc.go:1840 +0xb7 fp=0x7fed9ab21e48 sp=0x7fed9ab21e20
runtime.schedule()
	/home/reus/go/src/runtime/proc.go:2172 +0x2dd fp=0x7fed9ab21e88 sp=0x7fed9ab21e48
runtime.park_m(0xc420057680)
	/home/reus/go/src/runtime/proc.go:2271 +0xb6 fp=0x7fed9ab21ec0 sp=0x7fed9ab21e88
runtime.mcall(0x0)
	/home/reus/go/src/runtime/asm_amd64.s:269 +0x5b fp=0x7fed9ab21ed0 sp=0x7fed9ab21ec0

goroutine 1 [chan send]:
runtime.gopark(0x640958, 0xc4200c80c8, 0x632ab0, 0x9, 0xc42001c016, 0x3)
	/home/reus/go/src/runtime/proc.go:271 +0x12c fp=0xc420034e00 sp=0xc420034dd0
runtime.goparkunlock(0xc4200c80c8, 0x632ab0, 0x9, 0x411016, 0x3)
	/home/reus/go/src/runtime/proc.go:277 +0x5e fp=0xc420034e40 sp=0xc420034e00
runtime.chansend(0x5e6940, 0xc4200c8070, 0x6588ce, 0xc420034f01, 0x5c3b44, 0x5c3b7a)
	/home/reus/go/src/runtime/chan.go:229 +0x27f fp=0xc420034ee0 sp=0xc420034e40
runtime.chansend1(0x5e6940, 0xc4200c8070, 0x6588ce)
	/home/reus/go/src/runtime/chan.go:113 +0x4d fp=0xc420034f20 sp=0xc420034ee0
main.main()
	/home/reus/a.go:22 +0x114 fp=0xc420034f88 sp=0xc420034f20
runtime.main()
	/home/reus/go/src/runtime/proc.go:185 +0x20a fp=0xc420034fe0 sp=0xc420034f88
runtime.goexit()
	/home/reus/go/src/runtime/asm_amd64.s:2142 +0x1 fp=0xc420034fe8 sp=0xc420034fe0

goroutine 17 [syscall, locked to thread]:
runtime.goexit()
	/home/reus/go/src/runtime/asm_amd64.s:2142 +0x1 fp=0xc420036fe8 sp=0xc420036fe0

goroutine 2 [force gc (idle)]:
runtime.gopark(0x640958, 0x753350, 0x633ebb, 0xf, 0x640814, 0x1)
	/home/reus/go/src/runtime/proc.go:271 +0x12c fp=0xc420024768 sp=0xc420024738
runtime.goparkunlock(0x753350, 0x633ebb, 0xf, 0xc420000114, 0x1)
	/home/reus/go/src/runtime/proc.go:277 +0x5e fp=0xc4200247a8 sp=0xc420024768
runtime.forcegchelper()
	/home/reus/go/src/runtime/proc.go:226 +0x9e fp=0xc4200247e0 sp=0xc4200247a8
runtime.goexit()
	/home/reus/go/src/runtime/asm_amd64.s:2142 +0x1 fp=0xc4200247e8 sp=0xc4200247e0
created by runtime.init.4
	/home/reus/go/src/runtime/proc.go:215 +0x35

goroutine 3 [GC sweep wait]:
runtime.gopark(0x640958, 0x7534e0, 0x633757, 0xd, 0x450514, 0x1)
	/home/reus/go/src/runtime/proc.go:271 +0x12c fp=0xc420024f60 sp=0xc420024f30
runtime.goparkunlock(0x7534e0, 0x633757, 0xd, 0x14, 0x1)
	/home/reus/go/src/runtime/proc.go:277 +0x5e fp=0xc420024fa0 sp=0xc420024f60
runtime.bgsweep(0xc420054000)
	/home/reus/go/src/runtime/mgcsweep.go:72 +0x127 fp=0xc420024fd8 sp=0xc420024fa0
runtime.goexit()
	/home/reus/go/src/runtime/asm_amd64.s:2142 +0x1 fp=0xc420024fe0 sp=0xc420024fd8
created by runtime.gcenable
	/home/reus/go/src/runtime/mgc.go:212 +0x61

goroutine 4 [garbage collection]:
runtime.systemstack_switch()
	/home/reus/go/src/runtime/asm_amd64.s:281 fp=0xc420025550 sp=0xc420025548
runtime.gcMarkTermination()
	/home/reus/go/src/runtime/mgc.go:1226 +0x1e9 fp=0xc420025728 sp=0xc420025550
runtime.gcMarkDone()
	/home/reus/go/src/runtime/mgc.go:1188 +0x1fe fp=0xc420025748 sp=0xc420025728
runtime.gcBgMarkWorker(0xc42001a000)
	/home/reus/go/src/runtime/mgc.go:1556 +0x2fe fp=0xc4200257d8 sp=0xc420025748
runtime.goexit()
	/home/reus/go/src/runtime/asm_amd64.s:2142 +0x1 fp=0xc4200257e0 sp=0xc4200257d8
created by runtime.gcBgMarkStartWorkers
	/home/reus/go/src/runtime/mgc.go:1387 +0x7e

goroutine 5 [GC worker (idle)]:
runtime.gopark(0x6407f0, 0xc420010170, 0x63414c, 0x10, 0x14, 0x0)
	/home/reus/go/src/runtime/proc.go:271 +0x12c fp=0xc420025f48 sp=0xc420025f18
runtime.gcBgMarkWorker(0xc42001b300)
	/home/reus/go/src/runtime/mgc.go:1439 +0x143 fp=0xc420025fd8 sp=0xc420025f48
runtime.goexit()
	/home/reus/go/src/runtime/asm_amd64.s:2142 +0x1 fp=0xc420025fe0 sp=0xc420025fd8
created by runtime.gcBgMarkStartWorkers
	/home/reus/go/src/runtime/mgc.go:1387 +0x7e

goroutine 18 [GC worker (idle)]:
runtime.gopark(0x6407f0, 0xc420070000, 0x63414c, 0x10, 0x14, 0x0)
	/home/reus/go/src/runtime/proc.go:271 +0x12c fp=0xc420020748 sp=0xc420020718
runtime.gcBgMarkWorker(0xc42001c600)
	/home/reus/go/src/runtime/mgc.go:1439 +0x143 fp=0xc4200207d8 sp=0xc420020748
runtime.goexit()
	/home/reus/go/src/runtime/asm_amd64.s:2142 +0x1 fp=0xc4200207e0 sp=0xc4200207d8
created by runtime.gcBgMarkStartWorkers
	/home/reus/go/src/runtime/mgc.go:1387 +0x7e

goroutine 19 [GC worker (idle)]:
runtime.gopark(0x6407f0, 0xc420070010, 0x63414c, 0x10, 0x14, 0x0)
	/home/reus/go/src/runtime/proc.go:271 +0x12c fp=0xc420020f48 sp=0xc420020f18
runtime.gcBgMarkWorker(0xc42001d900)
	/home/reus/go/src/runtime/mgc.go:1439 +0x143 fp=0xc420020fd8 sp=0xc420020f48
runtime.goexit()
	/home/reus/go/src/runtime/asm_amd64.s:2142 +0x1 fp=0xc420020fe0 sp=0xc420020fd8
created by runtime.gcBgMarkStartWorkers
	/home/reus/go/src/runtime/mgc.go:1387 +0x7e

goroutine 20 [finalizer wait]:
runtime.gopark(0x640958, 0x770810, 0x633b96, 0xe, 0x14, 0x1)
	/home/reus/go/src/runtime/proc.go:271 +0x12c fp=0xc420021710 sp=0xc4200216e0
runtime.goparkunlock(0x770810, 0x633b96, 0xe, 0x14, 0x1)
	/home/reus/go/src/runtime/proc.go:277 +0x5e fp=0xc420021750 sp=0xc420021710
runtime.runfinq()
	/home/reus/go/src/runtime/mfinal.go:175 +0xbd fp=0xc4200217e0 sp=0xc420021750
runtime.goexit()
	/home/reus/go/src/runtime/asm_amd64.s:2142 +0x1 fp=0xc4200217e8 sp=0xc4200217e0
created by runtime.createfing
	/home/reus/go/src/runtime/mfinal.go:156 +0x62

goroutine 21 [chan receive]:
runtime.gopark(0x640958, 0xc42008e118, 0x633501, 0xc, 0xc42001ad17, 0x3)
	/home/reus/go/src/runtime/proc.go:271 +0x12c fp=0xc420021e78 sp=0xc420021e48
runtime.goparkunlock(0xc42008e118, 0x633501, 0xc, 0x17, 0x3)
	/home/reus/go/src/runtime/proc.go:277 +0x5e fp=0xc420021eb8 sp=0xc420021e78
runtime.chanrecv(0x5e6b80, 0xc42008e0c0, 0xc420021fc0, 0x1, 0x0)
	/home/reus/go/src/runtime/chan.go:513 +0x31b fp=0xc420021f68 sp=0xc420021eb8
runtime.chanrecv2(0x5e6b80, 0xc42008e0c0, 0xc420021fc0, 0x0)
	/home/reus/go/src/runtime/chan.go:400 +0x35 fp=0xc420021fa0 sp=0xc420021f68
database/sql.(*DB).connectionOpener(0xc4200900a0)
	/home/reus/go/src/database/sql/sql.go:837 +0x4a fp=0xc420021fd8 sp=0xc420021fa0
runtime.goexit()
	/home/reus/go/src/runtime/asm_amd64.s:2142 +0x1 fp=0xc420021fe0 sp=0xc420021fd8
created by database/sql.Open
	/home/reus/go/src/database/sql/sql.go:582 +0x1fd

goroutine 66 [runnable]:
syscall.Syscall(0x1, 0x5, 0xc4200d6020, 0x23, 0x23, 0x23, 0x0)
	/home/reus/go/src/syscall/asm_linux_amd64.s:18 +0x5 fp=0xc420038598 sp=0xc420038590
syscall.write(0x5, 0xc4200d6020, 0x23, 0x200, 0x77, 0x0, 0x0)
	/home/reus/go/src/syscall/zsyscall_linux_amd64.go:1029 +0x55 fp=0xc4200385f0 sp=0xc420038598
syscall.Write(0x5, 0xc4200d6020, 0x23, 0x200, 0xc4200d6020, 0x1, 0x0)
	/home/reus/go/src/syscall/syscall_unix.go:181 +0x49 fp=0xc420038638 sp=0xc4200385f0
internal/poll.(*FD).Write(0xc420088200, 0xc4200d6020, 0x23, 0x200, 0x0, 0x0, 0x0)
	/home/reus/go/src/internal/poll/fd_unix.go:213 +0x141 fp=0xc420038698 sp=0xc420038638
net.(*netFD).Write(0xc420088200, 0xc4200d6020, 0x23, 0x200, 0x3, 0xc420070cd0, 0x3)
	/home/reus/go/src/net/fd_unix.go:225 +0x52 fp=0xc420038700 sp=0xc420038698
net.(*conn).Write(0xc42000e030, 0xc4200d6020, 0x23, 0x200, 0x0, 0x0, 0x0)
	/home/reus/go/src/net/net.go:194 +0x6d fp=0xc420038768 sp=0xc420038700
github.com/lib/pq.(*conn).send(0xc4200d6000, 0xc4200388a0)
	/home/reus/src/github.com/lib/pq/conn.go:904 +0x89 fp=0xc4200387b0 sp=0xc420038768
github.com/lib/pq.(*stmt).exec(0xc4200908c0, 0xc420070ca0, 0x1, 0x1)
	/home/reus/src/github.com/lib/pq/conn.go:1274 +0x93d fp=0xc4200388f0 sp=0xc4200387b0
github.com/lib/pq.(*conn).query(0xc4200d6000, 0x63cf57, 0x2f, 0xc420070ca0, 0x1, 0x1, 0x0, 0x0, 0x0)
	/home/reus/src/github.com/lib/pq/conn.go:856 +0x385 fp=0xc420038998 sp=0xc4200388f0
github.com/lib/pq.(*conn).QueryContext(0xc4200d6000, 0x739820, 0xc420070170, 0x63cf57, 0x2f, 0xc4200184e0, 0x1, 0x1, 0x44f7e0, 0xc420038b40, ...)
	/home/reus/src/github.com/lib/pq/conn_go18.go:18 +0x1f1 fp=0xc420038a78 sp=0xc420038998
database/sql.ctxDriverQuery(0x739820, 0xc420070170, 0x7fed9c204858, 0xc4200d6000, 0x63cf57, 0x2f, 0xc4200184e0, 0x1, 0x1, 0x42735e, ...)
	/home/reus/go/src/database/sql/ctxutil.go:48 +0x28d fp=0xc420038b00 sp=0xc420038a78
database/sql.(*DB).queryConn.func1()
	/home/reus/go/src/database/sql/sql.go:1264 +0x99 fp=0xc420038b98 sp=0xc420038b00
database/sql.withLock(0x737fa0, 0xc4200c80e0, 0xc420038cd0)
	/home/reus/go/src/database/sql/sql.go:2545 +0x65 fp=0xc420038bc0 sp=0xc420038b98
database/sql.(*DB).queryConn(0xc4200900a0, 0x739820, 0xc420070170, 0xc4200c80e0, 0x640358, 0x63cf57, 0x2f, 0xc420070c90, 0x1, 0x1, ...)
	/home/reus/go/src/database/sql/sql.go:1263 +0x664 fp=0xc420038d40 sp=0xc420038bc0
database/sql.(*Tx).QueryContext(0xc420088600, 0x739820, 0xc420070170, 0x63cf57, 0x2f, 0xc420070c90, 0x1, 0x1, 0x0, 0x0, ...)
	/home/reus/go/src/database/sql/sql.go:1729 +0x176 fp=0xc420038dc0 sp=0xc420038d40
database/sql.(*Tx).Query(0xc420088600, 0x63cf57, 0x2f, 0xc420070c90, 0x1, 0x1, 0x7fed9c2d22b1, 0xc420052702, 0xc9)
	/home/reus/go/src/database/sql/sql.go:1734 +0x82 fp=0xc420038e28 sp=0xc420038dc0
github.com/jmoiron/sqlx.(*Tx).QueryRowx(0xc4200184b0, 0x63cf57, 0x2f, 0xc420070c90, 0x1, 0x1, 0x4110b6)
	/home/reus/src/github.com/jmoiron/sqlx/sqlx.go:435 +0x73 fp=0xc420038ea0 sp=0xc420038e28
github.com/jmoiron/sqlx.Get(0x7392a0, 0xc4200184b0, 0x5e1e40, 0xc420070c80, 0x63cf57, 0x2f, 0xc420070c90, 0x1, 0x1, 0x1, ...)
	/home/reus/src/github.com/jmoiron/sqlx/sqlx.go:675 +0x6d fp=0xc420038ee8 sp=0xc420038ea0
github.com/jmoiron/sqlx.(*Tx).Get(0xc4200184b0, 0x5e1e40, 0xc420070c80, 0x63cf57, 0x2f, 0xc420070c90, 0x1, 0x1, 0x0, 0x0)
	/home/reus/src/github.com/jmoiron/sqlx/sqlx.go:443 +0x90 fp=0xc420038f50 sp=0xc420038ee8
main.main.func1(0xc4200c8070, 0xc4200103b0, 0xc4200727b0)
	/home/reus/a.go:33 +0x120 fp=0xc420038fc8 sp=0xc420038f50
runtime.goexit()
	/home/reus/go/src/runtime/asm_amd64.s:2142 +0x1 fp=0xc420038fd0 sp=0xc420038fc8
created by main.main
	/home/reus/a.go:23 +0x14a

goroutine 39 [runnable]:
runtime.gopark(0x640958, 0x770fa8, 0x633a70, 0xe, 0x2a, 0x2)
	/home/reus/go/src/runtime/proc.go:271 +0x12c fp=0xc420033810 sp=0xc4200337e0
runtime.goparkunlock(0x770fa8, 0x633a70, 0xe, 0x102a, 0x2)
	/home/reus/go/src/runtime/proc.go:277 +0x5e fp=0xc420033850 sp=0xc420033810
runtime.gcParkAssist(0xc420057288)
	/home/reus/go/src/runtime/mgcmark.go:649 +0x121 fp=0xc420033888 sp=0xc420033850
runtime.gcAssistAlloc(0xc420057200)
	/home/reus/go/src/runtime/mgcmark.go:499 +0x199 fp=0xc4200338c8 sp=0xc420033888
runtime.mallocgc(0x5, 0x0, 0x0, 0x0)
	/home/reus/go/src/runtime/malloc.go:579 +0x9c7 fp=0xc420033968 sp=0xc4200338c8
runtime.rawstring(0x5, 0x0, 0x0, 0x0, 0x0, 0x0)
	/home/reus/go/src/runtime/string.go:237 +0x85 fp=0xc420033998 sp=0xc420033968
runtime.rawstringtmp(0x0, 0x5, 0xc420033a20, 0x41114d, 0xc420102040, 0xc4200b6026, 0xc420102040)
	/home/reus/go/src/runtime/string.go:107 +0x78 fp=0xc4200339d8 sp=0xc420033998
runtime.slicebytetostring(0x0, 0xc4200b6020, 0x5, 0x200, 0x5, 0xc4200b6000)
	/home/reus/go/src/runtime/string.go:89 +0x3e fp=0xc420033a30 sp=0xc4200339d8
github.com/lib/pq.(*readBuf).string(0xc420102040, 0xc420033b43, 0xc420102040)
	/home/reus/src/github.com/lib/pq/buf.go:38 +0xd6 fp=0xc420033a88 sp=0xc420033a30
github.com/lib/pq.(*conn).simpleExec(0xc4200b6000, 0x631e6b, 0x5, 0xc420033c10, 0x0, 0x0, 0x1a200000001, 0x0, 0x0)
	/home/reus/src/github.com/lib/pq/conn.go:623 +0x331 fp=0xc420033b70 sp=0xc420033a88
github.com/lib/pq.(*conn).Begin(0xc4200b6000, 0x0, 0x0, 0x0, 0x0)
	/home/reus/src/github.com/lib/pq/conn.go:529 +0xf1 fp=0xc420033bf8 sp=0xc420033b70
github.com/lib/pq.(*conn).BeginTx(0xc4200b6000, 0x739820, 0xc420070170, 0x0, 0xc4200b6000, 0xc420033c01, 0x427875, 0x4110b6, 0xc420033c98)
	/home/reus/src/github.com/lib/pq/conn_go18.go:48 +0xd2 fp=0xc420033c48 sp=0xc420033bf8
database/sql.ctxDriverBegin(0x739820, 0xc420070170, 0x0, 0x7392e0, 0xc4200b6000, 0x42735e, 0xc420014098, 0x737fc8, 0xc420054168)
	/home/reus/go/src/database/sql/ctxutil.go:107 +0xa6 fp=0xc420033cd0 sp=0xc420033c48
database/sql.(*DB).begin.func1()
	/home/reus/go/src/database/sql/sql.go:1366 +0x6b fp=0xc420033d48 sp=0xc420033cd0
database/sql.withLock(0x737fa0, 0xc4200c8000, 0xc420033dd8)
	/home/reus/go/src/database/sql/sql.go:2545 +0x65 fp=0xc420033d70 sp=0xc420033d48
database/sql.(*DB).begin(0xc4200900a0, 0x739820, 0xc420070170, 0x0, 0xc420057201, 0xc4200e9e78, 0x0, 0x0)
	/home/reus/go/src/database/sql/sql.go:1365 +0x152 fp=0xc420033e18 sp=0xc420033d70
database/sql.(*DB).BeginTx(0xc4200900a0, 0x739820, 0xc420070170, 0x0, 0xc420028a80, 0x640480, 0xc42009a198)
	/home/reus/go/src/database/sql/sql.go:1342 +0x70 fp=0xc420033e88 sp=0xc420033e18
database/sql.(*DB).Begin(0xc4200900a0, 0x640480, 0x0, 0x0)
	/home/reus/go/src/database/sql/sql.go:1356 +0x4c fp=0xc420033ed0 sp=0xc420033e88
github.com/jmoiron/sqlx.(*DB).Beginx(0xc4200727b0, 0xc4200e9f50, 0xc4200e9f58, 0xc42009a180)
	/home/reus/src/github.com/jmoiron/sqlx/sqlx.go:335 +0x32 fp=0xc420033f20 sp=0xc420033ed0
github.com/jmoiron/sqlx.(*DB).MustBegin(0xc4200727b0, 0x640480)
	/home/reus/src/github.com/jmoiron/sqlx/sqlx.go:326 +0x2b fp=0xc420033f50 sp=0xc420033f20
main.main.func1(0xc4200c8070, 0xc4200103b0, 0xc4200727b0)
	/home/reus/a.go:30 +0x69 fp=0xc420033fc8 sp=0xc420033f50
runtime.goexit()
	/home/reus/go/src/runtime/asm_amd64.s:2142 +0x1 fp=0xc420033fd0 sp=0xc420033fc8
created by main.main
	/home/reus/a.go:23 +0x14a

goroutine 46 [runnable]:
syscall.Syscall(0x1, 0x7, 0xc4200d62e0, 0xc, 0xc, 0xc, 0x0)
	/home/reus/go/src/syscall/asm_linux_amd64.s:18 +0x5 fp=0xc420032b20 sp=0xc420032b18
syscall.write(0x7, 0xc4200d62e0, 0xc, 0x200, 0x77, 0x0, 0x0)
	/home/reus/go/src/syscall/zsyscall_linux_amd64.go:1029 +0x55 fp=0xc420032b78 sp=0xc420032b20
syscall.Write(0x7, 0xc4200d62e0, 0xc, 0x200, 0x30, 0xc420032c70, 0x427a74)
	/home/reus/go/src/syscall/syscall_unix.go:181 +0x49 fp=0xc420032bc0 sp=0xc420032b78
internal/poll.(*FD).Write(0xc420088300, 0xc4200d62e0, 0xc, 0x200, 0x0, 0x0, 0x0)
	/home/reus/go/src/internal/poll/fd_unix.go:213 +0x141 fp=0xc420032c20 sp=0xc420032bc0
net.(*netFD).Write(0xc420088300, 0xc4200d62e0, 0xc, 0x200, 0x0, 0x19, 0x2)
	/home/reus/go/src/net/fd_unix.go:225 +0x52 fp=0xc420032c88 sp=0xc420032c20
net.(*conn).Write(0xc4200fa000, 0xc4200d62e0, 0xc, 0x200, 0x0, 0x0, 0x0)
	/home/reus/go/src/net/net.go:194 +0x6d fp=0xc420032cf0 sp=0xc420032c88
github.com/lib/pq.(*conn).send(0xc4200d62c0, 0xc420032df0)
	/home/reus/src/github.com/lib/pq/conn.go:904 +0x89 fp=0xc420032d38 sp=0xc420032cf0
github.com/lib/pq.(*conn).simpleExec(0xc4200d62c0, 0x6320cd, 0x6, 0xc420032ea0, 0x41114d, 0xc420014158, 0x737fc8, 0xc42008e120, 0xc4200e0158)
	/home/reus/src/github.com/lib/pq/conn.go:617 +0x188 fp=0xc420032e20 sp=0xc420032d38
github.com/lib/pq.(*conn).Commit(0xc4200d62c0, 0x0, 0x0)
	/home/reus/src/github.com/lib/pq/conn.go:572 +0x15d fp=0xc420032e98 sp=0xc420032e20
database/sql.(*Tx).Commit.func1()
	/home/reus/go/src/database/sql/sql.go:1509 +0x3c fp=0xc420032ec8 sp=0xc420032e98
database/sql.withLock(0x737fa0, 0xc4200c8150, 0xc420032f28)
	/home/reus/go/src/database/sql/sql.go:2545 +0x65 fp=0xc420032ef0 sp=0xc420032ec8
database/sql.(*Tx).Commit(0xc4200ea200, 0x5e1e40, 0xc4200105b0)
	/home/reus/go/src/database/sql/sql.go:1508 +0xd4 fp=0xc420032f50 sp=0xc420032ef0
main.main.func1(0xc4200c8070, 0xc4200103b0, 0xc4200727b0)
	/home/reus/a.go:38 +0x156 fp=0xc420032fc8 sp=0xc420032f50
runtime.goexit()
	/home/reus/go/src/runtime/asm_amd64.s:2142 +0x1 fp=0xc420032fd0 sp=0xc420032fc8
created by main.main
	/home/reus/a.go:23 +0x14a

goroutine 10 [runnable]:
runtime.gopark(0x640958, 0x770fa8, 0x633a70, 0xe, 0x2a, 0x2)
	/home/reus/go/src/runtime/proc.go:271 +0x12c fp=0xc4200f7558 sp=0xc4200f7528
runtime.goparkunlock(0x770fa8, 0x633a70, 0xe, 0xc4200b652a, 0x2)
	/home/reus/go/src/runtime/proc.go:277 +0x5e fp=0xc4200f7598 sp=0xc4200f7558
runtime.gcParkAssist(0xc420057588)
	/home/reus/go/src/runtime/mgcmark.go:649 +0x121 fp=0xc4200f75d0 sp=0xc4200f7598
runtime.gcAssistAlloc(0xc420057500)
	/home/reus/go/src/runtime/mgcmark.go:499 +0x199 fp=0xc4200f7610 sp=0xc4200f75d0
runtime.mallocgc(0x18, 0x5f14a0, 0xc4200b6501, 0x770900)
	/home/reus/go/src/runtime/malloc.go:579 +0x9c7 fp=0xc4200f76b0 sp=0xc4200f7610
runtime.newobject(0x5f14a0, 0xc420096040)
	/home/reus/go/src/runtime/malloc.go:803 +0x38 fp=0xc4200f76e0 sp=0xc4200f76b0
github.com/lib/pq.(*conn).recv(0xc4200b6580, 0xc420096040, 0xc4200180c0)
	/home/reus/src/github.com/lib/pq/conn.go:986 +0x31 fp=0xc4200f7720 sp=0xc4200f76e0
github.com/lib/pq.(*conn).startup(0xc4200b6580, 0xc4200180c0)
	/home/reus/src/github.com/lib/pq/conn.go:1105 +0xbb5 fp=0xc4200f78b8 sp=0xc4200f7720
github.com/lib/pq.DialOpen(0x7389a0, 0x770900, 0x63ae87, 0x25, 0x0, 0x0, 0x0, 0x0)
	/home/reus/src/github.com/lib/pq/conn.go:335 +0x76e fp=0xc4200f7af8 sp=0xc4200f78b8
github.com/lib/pq.Open(0x63ae87, 0x25, 0x0, 0x0, 0x0, 0x0)
	/home/reus/src/github.com/lib/pq/conn.go:242 +0x4d fp=0xc4200f7b48 sp=0xc4200f7af8
github.com/lib/pq.(*drv).Open(0x770900, 0x63ae87, 0x25, 0x0, 0x0, 0x0, 0x0)
	/home/reus/src/github.com/lib/pq/conn.go:41 +0x35 fp=0xc4200f7b88 sp=0xc4200f7b48
database/sql.(*DB).conn(0xc4200900a0, 0x739820, 0xc420070170, 0x1, 0x0, 0x0, 0x0)
	/home/reus/go/src/database/sql/sql.go:965 +0x146 fp=0xc4200f7d70 sp=0xc4200f7b88
database/sql.(*DB).begin(0xc4200900a0, 0x739820, 0xc420070170, 0x0, 0xc420057501, 0xc420022678, 0x0, 0x0)
	/home/reus/go/src/database/sql/sql.go:1360 +0x8a fp=0xc4200f7e18 sp=0xc4200f7d70
database/sql.(*DB).BeginTx(0xc4200900a0, 0x739820, 0xc420070170, 0x0, 0xc420052700, 0x640480, 0xc420014198)
	/home/reus/go/src/database/sql/sql.go:1342 +0x70 fp=0xc4200f7e88 sp=0xc4200f7e18
database/sql.(*DB).Begin(0xc4200900a0, 0x640480, 0x0, 0x0)
	/home/reus/go/src/database/sql/sql.go:1356 +0x4c fp=0xc4200f7ed0 sp=0xc4200f7e88
github.com/jmoiron/sqlx.(*DB).Beginx(0xc4200727b0, 0xc420022750, 0xc420022758, 0xc420014180)
	/home/reus/src/github.com/jmoiron/sqlx/sqlx.go:335 +0x32 fp=0xc4200f7f20 sp=0xc4200f7ed0
github.com/jmoiron/sqlx.(*DB).MustBegin(0xc4200727b0, 0x640480)
	/home/reus/src/github.com/jmoiron/sqlx/sqlx.go:326 +0x2b fp=0xc4200f7f50 sp=0xc4200f7f20
main.main.func1(0xc4200c8070, 0xc4200103b0, 0xc4200727b0)
	/home/reus/a.go:30 +0x69 fp=0xc4200f7fc8 sp=0xc4200f7f50
runtime.goexit()
	/home/reus/go/src/runtime/asm_amd64.s:2142 +0x1 fp=0xc4200f7fd0 sp=0xc4200f7fc8
created by main.main
	/home/reus/a.go:23 +0x14a

goroutine 11 [runnable]:
runtime.gopark(0x640958, 0x75fb20, 0x632f5f, 0xa, 0xc4200dc319, 0x4)
	/home/reus/go/src/runtime/proc.go:271 +0x12c fp=0xc420022d48 sp=0xc420022d18
runtime.goparkunlock(0x75fb20, 0x632f5f, 0xa, 0x19, 0x4)
	/home/reus/go/src/runtime/proc.go:277 +0x5e fp=0xc420022d88 sp=0xc420022d48
runtime.semacquire1(0x770f78, 0x411100, 0x0)
	/home/reus/go/src/runtime/sema.go:144 +0x1c1 fp=0xc420022df8 sp=0xc420022d88
runtime.semacquire(0x770f78)
	/home/reus/go/src/runtime/sema.go:95 +0x39 fp=0xc420022e20 sp=0xc420022df8
runtime.gcMarkDone()
	/home/reus/go/src/runtime/mgc.go:1090 +0x31 fp=0xc420022e40 sp=0xc420022e20
runtime.gcAssistAlloc(0xc420057680)
	/home/reus/go/src/runtime/mgcmark.go:474 +0x1cc fp=0xc420022e80 sp=0xc420022e40
runtime.mallocgc(0x10, 0x5fbbe0, 0x640a01, 0xc4200576a8)
	/home/reus/go/src/runtime/malloc.go:579 +0x9c7 fp=0xc420022f20 sp=0xc420022e80
runtime.newobject(0x5fbbe0, 0x4beb3f)
	/home/reus/go/src/runtime/malloc.go:803 +0x38 fp=0xc420022f50 sp=0xc420022f20
database/sql.(*Rows).close(0xc4200d8080, 0x7368e0, 0xc420070160, 0xc420088000, 0xc4200dc101)
	/home/reus/go/src/database/sql/sql.go:2421 +0x31 fp=0xc420022f90 sp=0xc420022f50
database/sql.(*Rows).awaitDone(0xc4200d8080, 0x7397e0, 0xc4200da000)
	/home/reus/go/src/database/sql/sql.go:2122 +0x8e fp=0xc420022fc8 sp=0xc420022f90
runtime.goexit()
	/home/reus/go/src/runtime/asm_amd64.s:2142 +0x1 fp=0xc420022fd0 sp=0xc420022fc8
created by database/sql.(*Rows).initContextClose
	/home/reus/go/src/database/sql/sql.go:2116 +0x92

goroutine 42 [runnable]:
runtime.gopark(0x640958, 0x770fa8, 0x633a70, 0xe, 0x2a, 0x2)
	/home/reus/go/src/runtime/proc.go:271 +0x12c fp=0xc4200d05c8 sp=0xc4200d0598
runtime.goparkunlock(0x770fa8, 0x633a70, 0xe, 0x44f72a, 0x2)
	/home/reus/go/src/runtime/proc.go:277 +0x5e fp=0xc4200d0608 sp=0xc4200d05c8
runtime.gcParkAssist(0xc420057b88)
	/home/reus/go/src/runtime/mgcmark.go:649 +0x121 fp=0xc4200d0640 sp=0xc4200d0608
runtime.gcAssistAlloc(0xc420057b00)
	/home/reus/go/src/runtime/mgcmark.go:499 +0x199 fp=0xc4200d0680 sp=0xc4200d0640
runtime.mallocgc(0x10, 0x5fbbe0, 0x640a01, 0xc420057b28)
	/home/reus/go/src/runtime/malloc.go:579 +0x9c7 fp=0xc4200d0720 sp=0xc4200d0680
runtime.newobject(0x5fbbe0, 0x4beb3f)
	/home/reus/go/src/runtime/malloc.go:803 +0x38 fp=0xc4200d0750 sp=0xc4200d0720
database/sql.(*Rows).close(0xc4200ea080, 0x7368e0, 0xc420070160, 0x430628, 0x640820)
	/home/reus/go/src/database/sql/sql.go:2421 +0x31 fp=0xc4200d0790 sp=0xc4200d0750
database/sql.(*Rows).awaitDone(0xc4200ea080, 0x7397e0, 0xc4200e0080)
	/home/reus/go/src/database/sql/sql.go:2122 +0x8e fp=0xc4200d07c8 sp=0xc4200d0790
runtime.goexit()
	/home/reus/go/src/runtime/asm_amd64.s:2142 +0x1 fp=0xc4200d07d0 sp=0xc4200d07c8
created by database/sql.(*Rows).initContextClose
	/home/reus/go/src/database/sql/sql.go:2116 +0x92

goroutine 27 [runnable (scan)]:
runtime.gopark(0x640958, 0x770fa8, 0x633a70, 0xe, 0x2a, 0x2)
	/home/reus/go/src/runtime/proc.go:271 +0x12c fp=0xc4200d0dc8 sp=0xc4200d0d98
runtime.goparkunlock(0x770fa8, 0x633a70, 0xe, 0x44f72a, 0x2)
	/home/reus/go/src/runtime/proc.go:277 +0x5e fp=0xc4200d0e08 sp=0xc4200d0dc8
runtime.gcParkAssist(0xc420057d08)
	/home/reus/go/src/runtime/mgcmark.go:649 +0x121 fp=0xc4200d0e40 sp=0xc4200d0e08
runtime.gcAssistAlloc(0xc420057c80)
	/home/reus/go/src/runtime/mgcmark.go:499 +0x199 fp=0xc4200d0e80 sp=0xc4200d0e40
runtime.mallocgc(0x10, 0x5fbbe0, 0x640a01, 0xc420057ca8)
	/home/reus/go/src/runtime/malloc.go:579 +0x9c7 fp=0xc4200d0f20 sp=0xc4200d0e80
runtime.newobject(0x5fbbe0, 0x4beb3f)
	/home/reus/go/src/runtime/malloc.go:803 +0x38 fp=0xc4200d0f50 sp=0xc4200d0f20
database/sql.(*Rows).close(0xc420088280, 0x7368e0, 0xc420070160, 0xc4200d8100, 0xc420062301)
	/home/reus/go/src/database/sql/sql.go:2421 +0x31 fp=0xc4200d0f90 sp=0xc4200d0f50
database/sql.(*Rows).awaitDone(0xc420088280, 0x7397e0, 0xc42009a480)
	/home/reus/go/src/database/sql/sql.go:2122 +0x8e fp=0xc4200d0fc8 sp=0xc4200d0f90
runtime.goexit()
	/home/reus/go/src/runtime/asm_amd64.s:2142 +0x1 fp=0xc4200d0fd0 sp=0xc4200d0fc8
created by database/sql.(*Rows).initContextClose
	/home/reus/go/src/database/sql/sql.go:2116 +0x92

goroutine 62 [runnable]:
database/sql.(*Rows).awaitDone(0xc420110000, 0x7397e0, 0xc4200142c0)
	/home/reus/go/src/database/sql/sql.go:2120 fp=0xc4200e97c8 sp=0xc4200e97c0
runtime.goexit()
	/home/reus/go/src/runtime/asm_amd64.s:2142 +0x1 fp=0xc4200e97d0 sp=0xc4200e97c8
created by database/sql.(*Rows).initContextClose
	/home/reus/go/src/database/sql/sql.go:2116 +0x92

goroutine 30 [runnable]:
runtime.gopark(0x640958, 0x770fa8, 0x633a70, 0xe, 0x2a, 0x2)
	/home/reus/go/src/runtime/proc.go:271 +0x12c fp=0xc4200ce5c8 sp=0xc4200ce598
runtime.goparkunlock(0x770fa8, 0x633a70, 0xe, 0x44f72a, 0x2)
	/home/reus/go/src/runtime/proc.go:277 +0x5e fp=0xc4200ce608 sp=0xc4200ce5c8
runtime.gcParkAssist(0xc420001d08)
	/home/reus/go/src/runtime/mgcmark.go:649 +0x121 fp=0xc4200ce640 sp=0xc4200ce608
runtime.gcAssistAlloc(0xc420001c80)
	/home/reus/go/src/runtime/mgcmark.go:499 +0x199 fp=0xc4200ce680 sp=0xc4200ce640
runtime.mallocgc(0x10, 0x5fbbe0, 0x640a01, 0xc420001ca8)
	/home/reus/go/src/runtime/malloc.go:579 +0x9c7 fp=0xc4200ce720 sp=0xc4200ce680
runtime.newobject(0x5fbbe0, 0x4beb3f)
	/home/reus/go/src/runtime/malloc.go:803 +0x38 fp=0xc4200ce750 sp=0xc4200ce720
database/sql.(*Rows).close(0xc420088480, 0x7368e0, 0xc420070160, 0x0, 0x0)
	/home/reus/go/src/database/sql/sql.go:2421 +0x31 fp=0xc4200ce790 sp=0xc4200ce750
database/sql.(*Rows).awaitDone(0xc420088480, 0x7397e0, 0xc42009a580)
	/home/reus/go/src/database/sql/sql.go:2122 +0x8e fp=0xc4200ce7c8 sp=0xc4200ce790
runtime.goexit()
	/home/reus/go/src/runtime/asm_amd64.s:2142 +0x1 fp=0xc4200ce7d0 sp=0xc4200ce7c8
created by database/sql.(*Rows).initContextClose
	/home/reus/go/src/database/sql/sql.go:2116 +0x92

goroutine 45 [runnable]:
runtime.gopark(0x640958, 0x770fa8, 0x633a70, 0xe, 0x2a, 0x2)
	/home/reus/go/src/runtime/proc.go:271 +0x12c fp=0xc4200e9dc8 sp=0xc4200e9d98
runtime.goparkunlock(0x770fa8, 0x633a70, 0xe, 0x44f72a, 0x2)
	/home/reus/go/src/runtime/proc.go:277 +0x5e fp=0xc4200e9e08 sp=0xc4200e9dc8
runtime.gcParkAssist(0xc420104388)
	/home/reus/go/src/runtime/mgcmark.go:649 +0x121 fp=0xc4200e9e40 sp=0xc4200e9e08
runtime.gcAssistAlloc(0xc420104300)
	/home/reus/go/src/runtime/mgcmark.go:499 +0x199 fp=0xc4200e9e80 sp=0xc4200e9e40
runtime.mallocgc(0x10, 0x5fbbe0, 0x640a01, 0xc420104328)
	/home/reus/go/src/runtime/malloc.go:579 +0x9c7 fp=0xc4200e9f20 sp=0xc4200e9e80
runtime.newobject(0x5fbbe0, 0x4beb3f)
	/home/reus/go/src/runtime/malloc.go:803 +0x38 fp=0xc4200e9f50 sp=0xc4200e9f20
database/sql.(*Rows).close(0xc4200ea180, 0x7368e0, 0xc420070160, 0x0, 0x454a71)
	/home/reus/go/src/database/sql/sql.go:2421 +0x31 fp=0xc4200e9f90 sp=0xc4200e9f50
database/sql.(*Rows).awaitDone(0xc4200ea180, 0x7397e0, 0xc4200e0100)
	/home/reus/go/src/database/sql/sql.go:2122 +0x8e fp=0xc4200e9fc8 sp=0xc4200e9f90
runtime.goexit()
	/home/reus/go/src/runtime/asm_amd64.s:2142 +0x1 fp=0xc4200e9fd0 sp=0xc4200e9fc8
created by database/sql.(*Rows).initContextClose
	/home/reus/go/src/database/sql/sql.go:2116 +0x92

goroutine 47 [runnable]:
database/sql.(*Tx).awaitDone(0xc4200ea200)
	/home/reus/go/src/database/sql/sql.go:1437 fp=0xc4200ca7d8 sp=0xc4200ca7d0
runtime.goexit()
	/home/reus/go/src/runtime/asm_amd64.s:2142 +0x1 fp=0xc4200ca7e0 sp=0xc4200ca7d8
created by database/sql.(*DB).begin
	/home/reus/go/src/database/sql/sql.go:1383 +0x26e

goroutine 33 [runnable]:
runtime.gopark(0x640958, 0x770fa8, 0x633a70, 0xe, 0x2a, 0x2)
	/home/reus/go/src/runtime/proc.go:271 +0x12c fp=0xc4200265c8 sp=0xc420026598
runtime.goparkunlock(0x770fa8, 0x633a70, 0xe, 0x44f72a, 0x2)
	/home/reus/go/src/runtime/proc.go:277 +0x5e fp=0xc420026608 sp=0xc4200265c8
runtime.gcParkAssist(0xc420106088)
	/home/reus/go/src/runtime/mgcmark.go:649 +0x121 fp=0xc420026640 sp=0xc420026608
runtime.gcAssistAlloc(0xc420106000)
	/home/reus/go/src/runtime/mgcmark.go:499 +0x199 fp=0xc420026680 sp=0xc420026640
runtime.mallocgc(0x10, 0x5fbbe0, 0x640a01, 0xc420106028)
	/home/reus/go/src/runtime/malloc.go:579 +0x9c7 fp=0xc420026720 sp=0xc420026680
runtime.newobject(0x5fbbe0, 0x4beb3f)
	/home/reus/go/src/runtime/malloc.go:803 +0x38 fp=0xc420026750 sp=0xc420026720
database/sql.(*Rows).close(0xc420088580, 0x7368e0, 0xc420070160, 0x0, 0x454a71)
	/home/reus/go/src/database/sql/sql.go:2421 +0x31 fp=0xc420026790 sp=0xc420026750
database/sql.(*Rows).awaitDone(0xc420088580, 0x7397e0, 0xc42009a600)
	/home/reus/go/src/database/sql/sql.go:2122 +0x8e fp=0xc4200267c8 sp=0xc420026790
runtime.goexit()
	/home/reus/go/src/runtime/asm_amd64.s:2142 +0x1 fp=0xc4200267d0 sp=0xc4200267c8
created by database/sql.(*Rows).initContextClose
	/home/reus/go/src/database/sql/sql.go:2116 +0x92

goroutine 67 [runnable]:
runtime.gopark(0x640958, 0x770fa8, 0x633a70, 0xe, 0x2a, 0x2)
	/home/reus/go/src/runtime/proc.go:271 +0x12c fp=0xc420026dc8 sp=0xc420026d98
runtime.goparkunlock(0x770fa8, 0x633a70, 0xe, 0x73982a, 0x2)
	/home/reus/go/src/runtime/proc.go:277 +0x5e fp=0xc420026e08 sp=0xc420026dc8
runtime.gcParkAssist(0xc420106208)
	/home/reus/go/src/runtime/mgcmark.go:649 +0x121 fp=0xc420026e40 sp=0xc420026e08
runtime.gcAssistAlloc(0xc420106180)
	/home/reus/go/src/runtime/mgcmark.go:499 +0x199 fp=0xc420026e80 sp=0xc420026e40
runtime.mallocgc(0x60, 0x0, 0xc420026f01, 0xc42009a1c0)
	/home/reus/go/src/runtime/malloc.go:579 +0x9c7 fp=0xc420026f20 sp=0xc420026e80
runtime.makechan(0x5e6b80, 0x0, 0x0)
	/home/reus/go/src/runtime/chan.go:83 +0xa9 fp=0xc420026f68 sp=0xc420026f20
context.(*cancelCtx).Done(0xc42009a640, 0x0)
	/home/reus/go/src/context/context.go:328 +0x95 fp=0xc420026fa8 sp=0xc420026f68
database/sql.(*Tx).awaitDone(0xc420088600)
	/home/reus/go/src/database/sql/sql.go:1440 +0x34 fp=0xc420026fd8 sp=0xc420026fa8
runtime.goexit()
	/home/reus/go/src/runtime/asm_amd64.s:2142 +0x1 fp=0xc420026fe0 sp=0xc420026fd8
created by database/sql.(*DB).begin
	/home/reus/go/src/database/sql/sql.go:1383 +0x26e
fish: 'env GODEBUG=gccheckmark=1 GOTRA…' terminated by signal SIGABRT (Abort)

@reusee

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commented Mar 9, 2017

Bisecting shows that it's introduced by commit c026845

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commented Mar 9, 2017

@aclements, I'll let you either keep this or dup it into #19468 or #19029 as you wish.

I don't see how a database/sql change (c026845) can cause runtime crashes, unless the compiler is getting something wrong and that change just happens to tickle it.

@bradfitz bradfitz added this to the Go1.9 milestone Mar 9, 2017

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commented Mar 9, 2017

@reusee can you try to keep c026845 as a local change and bisect before that? it could be a compiler/runtime bug which is triggered by the code as modified by that commit, as you would need to reapply that commit on top of previous commits.

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commented Mar 9, 2017

@rasky I'll give it a try.

And I found that it's context.cancelCtx.cancel that trigger the crash: https://github.com/golang/go/blob/master/src/context/context.go#L367. But I'm not able to make a reproduce with context yet.

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commented Mar 9, 2017

Backporting c026845 and bisecting gives 8179b9b as the first bad commit.

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commented Mar 9, 2017

/cc @randall77 as author of the commit causing regression

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commented Mar 9, 2017

This is probably a dup of #19078.

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commented Mar 14, 2017

#19078 has been fixed - can someone check whether this issue is fixed on tip?

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commented Mar 14, 2017

It's fixed.

@reusee reusee closed this Mar 14, 2017

@golang golang locked and limited conversation to collaborators Mar 14, 2018

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