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runtime: encountered a SIGSEGV during 'go run' in go1.16beta1 #43284

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aaronbee opened this issue Dec 19, 2020 · 5 comments
Closed

runtime: encountered a SIGSEGV during 'go run' in go1.16beta1 #43284

aaronbee opened this issue Dec 19, 2020 · 5 comments
Labels
FrozenDueToAge NeedsInvestigation Someone must examine and confirm this is a valid issue and not a duplicate of an existing one. OS-Darwin
Milestone
Go1.16

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@aaronbee
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What version of Go are you using (go version)?

$ go1.16beta1 version
go version go1.16beta1 darwin/amd64

Does this issue reproduce with the latest release?

I haven't tried anything newer than go1.16beta1

What operating system and processor architecture are you using (go env)?

go env Output
$ go1.16beta1 env
GO111MODULE=""
GOARCH="amd64"
GOBIN=""
GOCACHE="/Users/aaron/Library/Caches/go-build"
GOENV="/Users/aaron/Library/Application Support/go/env"
GOEXE=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="darwin"
GOINSECURE=""
GOMODCACHE="/Users/aaron/go/pkg/mod"
GONOPROXY=""
GONOSUMDB=""
GOOS="darwin"
GOPATH="/Users/aaron/go"
GOPRIVATE=""
GOPROXY="https://proxy.golang.org,direct"
GOROOT="/Users/aaron/sdk/go1.16beta1"
GOSUMDB="sum.golang.org"
GOTMPDIR=""
GOTOOLDIR="/Users/aaron/sdk/go1.16beta1/pkg/tool/darwin_amd64"
GOVCS=""
GOVERSION="go1.16beta1"
GCCGO="gccgo"
AR="ar"
CC="clang"
CXX="clang++"
CGO_ENABLED="1"
GOMOD="/Users/aaron/go/src/aoc2020/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 -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/pc/xv443hl12xq5hjbjg9qlt15w0000gn/T/go-build3589196996=/tmp/go-build -gno-record-gcc-switches -fno-common"

What did you do?

$ GOARCH=arm64 go1.16beta1 run main.go sample.txt

Note: this is on an M1 Mac with and amd64 build of go1.16beta1, compiling a program with GOARCH=arm64.

main.go can be found here.
I only saw the SIGSEGV once. Re-runs of this same command with the same code did not fail.

What did you expect to see?

Program compiled and run.

What did you see instead?

Looks to be a crash during build cache lookup?

unexpected fault address 0x48241c894848731b
fatal error: fault
[signal SIGSEGV: segmentation violation code=0x2 addr=0x48241c894848731b pc=0x113a8ab]

goroutine 28 [running]:
runtime.throw(0x164115a, 0x5)
	/usr/local/go/src/runtime/panic.go:1112 +0x72 fp=0xc000137c98 sp=0xc000137c68 pc=0x10376d2
runtime.sigpanic()
	/usr/local/go/src/runtime/signal_unix.go:737 +0x276 fp=0xc000137cd0 sp=0xc000137c98 pc=0x104e2f6
regexp.(*Regexp).doExecute(0x48241c894848728b, 0x0, 0x0, 0x0, 0x0, 0x0, 0x15bbc20, 0x0, 0x0, 0x0, ...)
	/usr/local/go/src/regexp/exec.go:527 +0x56b fp=0xc000137d90 sp=0xc000137cd0 pc=0x113a8ab
regexp.(*Regexp).doMatch(...)
	/usr/local/go/src/regexp/exec.go:514
regexp.(*Regexp).MatchString(...)
	/usr/local/go/src/regexp/regexp.go:525
internal/lazyregexp.(*Regexp).MatchString(0x1432015, 0x15bbc20, 0x0, 0x8)
	/usr/local/go/src/internal/lazyregexp/lazyre.go:59 +0xb2 fp=0xc000137e30 sp=0xc000137d90 pc=0x11461b2
runtime: unexpected return pc for cmd/go/internal/modload.(*loader).load called from 0xc000137f50
stack: frame={sp:0xc000137e30, fp:0xc000137f38} stack=[0xc000136000,0xc000138000)
000000c000137d30:  0000000000203000  0000000000203000 
000000c000137d40:  0000000000203000  000000000000000a 
000000c000137d50:  000000c0001f0800  0000000000000014 
000000c000137d60:  0000000000000006  000000c000137db8 
000000c000137d70:  000000c000137df8  000000000100f372  
000000c000137d80:  000000c000137e20  00000000011461b2  
000000c000137d90:  48241c894848728b  0000000000000000 
000000c000137da0:  0000000000000000  0000000000000000 
000000c000137db0:  0000000000000000  0000000000000000 
000000c000137dc0:  00000000015bbc20  0000000000000000 
000000c000137dd0:  0000000000000000  0000000000000000 
000000c000137de0:  0000000000000000  0000000000000000 
000000c000137df0:  0000000000000000  000000c000137e28 
000000c000137e00:  000000000104f2ec   0000000000000040 
000000c000137e10:  00000000011464a0   0000000001432015  
000000c000137e20:  000000c000137f30  0000000001432015  
000000c000137e30: <0000000001432015   00000000015bbc20 
000000c000137e40:  0000000000000000  0000000000000008 
000000c000137e50:  000000c00034e500  000000c000128d11 
000000c000137e60:  0000000000000007  000000c000366200 
000000c000137e70:  0000000000000015  0000000000000020 
000000c000137e80:  0000000000000000  0000000000000000 
000000c000137e90:  000000c000128cf0  0000000000000028 
000000c000137ea0:  0000000000000000  0000000000000000 
000000c000137eb0:  000000c000314f98  0000000000000007 
000000c000137ec0:  0000000000000001  0000000000000020 
000000c000137ed0:  0000000000000015  0000000000000008 
000000c000137ee0:  000000c00011ad21  000000c00012c4d8 
000000c000137ef0:  000000c00025e060  000000c000366200 
000000c000137f00:  000000c00034a680  000000c000162b58 
000000c000137f10:  000000c000046758  000000c000314f50 
000000c000137f20:  0000000001006dd5   000000c00012c480 
000000c000137f30: !000000c000137f50 >0000000001444893  
000000c000137f40:  000000c000148400  000000c000162b00 
000000c000137f50:  000000c000137fc0  000000000136ff3c  
000000c000137f60:  000000c00012c480  000000c000314f98 
000000c000137f70:  0000000000000008  000000c00013e7d0 
000000c000137f80:  0000000000000001  0000000000000002 
000000c000137f90:  000000c0000a4060  0000000000000008 
000000c000137fa0:  000000c00013e7d0  0000000000000001 
000000c000137fb0:  0000000000000002  000000c0000a4060 
000000c000137fc0:  0000000000000000  000000000106d701  
000000c000137fd0:  000000c00012a0c0  000000c0001115c0 
000000c000137fe0:  0000000000000000  0000000000000000 
000000c000137ff0:  0000000000000000  0000000000000000 
cmd/go/internal/modload.(*loader).load(0x1444893, 0xc000148400)
	/usr/local/go/src/cmd/go/internal/modload/load.go:1085 +0x6f5 fp=0xc000137f38 sp=0xc000137e30 pc=0x1432015
created by cmd/go/internal/par.(*Queue).Add
	/usr/local/go/src/cmd/go/internal/par/queue.go:56 +0x23d

goroutine 1 [chan receive]:
cmd/go/internal/modload.loadFromRoots(0xc000197fb0, 0x1, 0x0, 0x0, 0x1, 0xc0001b2b40, 0x5)
	/usr/local/go/src/cmd/go/internal/modload/load.go:831 +0x328
cmd/go/internal/modload.ImportFromFiles(0x171dda8, 0xc00011a000, 0xc00012e020, 0x1, 0x2)
	/usr/local/go/src/cmd/go/internal/modload/load.go:514 +0x23c
cmd/go/internal/load.GoFilesPackage(0x171dda8, 0xc00011a000, 0xc00012e020, 0x1, 0x2, 0x10f8275)
	/usr/local/go/src/cmd/go/internal/load/pkg.go:2513 +0x930
cmd/go/internal/run.runRun(0x171dda8, 0xc00011a000, 0x19c9100, 0xc00012e020, 0x2, 0x2)
	/usr/local/go/src/cmd/go/internal/run/run.go:80 +0x15e
main.main()
	/usr/local/go/src/cmd/go/main.go:195 +0x70c

goroutine 31 [GC assist wait]:
syscall.ByteSliceFromString(...)
	/usr/local/go/src/syscall/syscall.go:53
syscall.BytePtrFromString(...)
	/usr/local/go/src/syscall/syscall.go:69
syscall.Lstat(0xc000345d80, 0x3b, 0xc00037c038, 0xc000345d80, 0xc000345dae)
	/usr/local/go/src/syscall/zsyscall_darwin_amd64.go:2015 +0x1a5
os.lstatNolog.func1(...)
	/usr/local/go/src/os/stat_unix.go:45
os.ignoringEINTR(...)
	/usr/local/go/src/os/file_posix.go:245
os.lstatNolog(0xc000345d80, 0x3b, 0x3, 0x3, 0xc000345d80, 0x3b)
	/usr/local/go/src/os/stat_unix.go:44 +0x65
os.Lstat(0xc000345d80, 0x3b, 0x2d, 0x1706820, 0x1, 0xc00034c915)
	/usr/local/go/src/os/stat.go:22 +0x4d
os.(*File).readdir(0xc000324108, 0xffffffffffffffff, 0x2, 0x0, 0x0, 0xc0001337d8, 0x10e9445, 0xc0003183c0, 0x2d, 0x0, ...)
	/usr/local/go/src/os/dir_darwin.go:85 +0x86d
os.(*File).Readdir(0xc000324108, 0xffffffffffffffff, 0x0, 0x0, 0xc000324108, 0x0, 0x0)
	/usr/local/go/src/os/dir.go:41 +0x51
io/ioutil.ReadDir(0xc0003183c0, 0x2d, 0xc0003183c0, 0x2d, 0x10cc896, 0x171c630, 0x1a04b00)
	/usr/local/go/src/io/ioutil/ioutil.go:63 +0x90
cmd/go/internal/fsys.readDir(0xc0003183c0, 0x2d, 0xc0003183c0, 0x2d, 0x1a04b00, 0x2, 0xc00031c5e0)
	/usr/local/go/src/cmd/go/internal/fsys/fsys.go:246 +0x39
cmd/go/internal/fsys.ReadDir(0xc0003183c0, 0x2d, 0x2d, 0xc000133e28, 0x1423055, 0xc000133df8, 0x3)
	/usr/local/go/src/cmd/go/internal/fsys/fsys.go:270 +0xb45
cmd/go/internal/imports.ScanDir(0xc0003183c0, 0x2d, 0xc000197fb0, 0x10e4485, 0xc0003342f1, 0xc, 0x1431540, 0xffffffffffffffff, 0xc0000ac370, 0xc00031e200, ...)
	/usr/local/go/src/cmd/go/internal/imports/scan.go:19 +0x50
cmd/go/internal/modload.scanDir(0xc0003183c0, 0x2d, 0xc000197fb0, 0xc, 0xc00009e000, 0x3, 0x4, 0x0, 0x0, 0x0, ...)
	/usr/local/go/src/cmd/go/internal/modload/load.go:1211 +0x5a
cmd/go/internal/modload.(*loader).load(0xc000148400, 0xc0003640b0)
	/usr/local/go/src/cmd/go/internal/modload/load.go:1077 +0x3cf
cmd/go/internal/modload.(*loader).pkg.func1.1()
	/usr/local/go/src/cmd/go/internal/modload/load.go:959 +0x33
cmd/go/internal/par.(*Queue).Add.func1(0xc000324078, 0xc0001115c0)
	/usr/local/go/src/cmd/go/internal/par/queue.go:58 +0x7c
created by cmd/go/internal/par.(*Queue).Add
	/usr/local/go/src/cmd/go/internal/par/queue.go:56 +0x23d

goroutine 35 [runnable]:
syscall.syscall(0x1084920, 0x2409650, 0xc00021ad80, 0xc000010178, 0x0, 0x0, 0x0)
	/usr/local/go/src/runtime/sys_darwin.go:63 +0x2e
syscall.readdir_r(0x2409650, 0xc00021ad80, 0xc000010178, 0xc000110040)
	/usr/local/go/src/syscall/zsyscall_darwin_amd64.go:1258 +0x65
os.(*File).readdir(0xc000010170, 0xffffffffffffffff, 0x2, 0x0, 0x0, 0xc00005d7d8, 0x10e9445, 0xc000026780, 0x28, 0x0, ...)
	/usr/local/go/src/os/dir_darwin.go:48 +0x1c5
os.(*File).Readdir(0xc000010170, 0xffffffffffffffff, 0x0, 0x0, 0xc000010170, 0x0, 0x0)
	/usr/local/go/src/os/dir.go:41 +0x51
io/ioutil.ReadDir(0xc000026780, 0x28, 0xc000026780, 0x28, 0x10cc896, 0x171c630, 0xc00000e1b0)
	/usr/local/go/src/io/ioutil/ioutil.go:63 +0x90
cmd/go/internal/fsys.readDir(0xc000026780, 0x28, 0xc000026780, 0x28, 0x1a04b00, 0x5, 0xc000218880)
	/usr/local/go/src/cmd/go/internal/fsys/fsys.go:246 +0x39
cmd/go/internal/fsys.ReadDir(0xc000026780, 0x28, 0x28, 0xc00005de28, 0x1423055, 0xc00005ddf8, 0x3)
	/usr/local/go/src/cmd/go/internal/fsys/fsys.go:270 +0xb45
cmd/go/internal/imports.ScanDir(0xc000026780, 0x28, 0xc000197fb0, 0x10e4485, 0xc000028611, 0x7, 0x1431540, 0xffffffffffffffff, 0xc0000ac370, 0xc000060400, ...)
	/usr/local/go/src/cmd/go/internal/imports/scan.go:19 +0x50
cmd/go/internal/modload.scanDir(0xc000026780, 0x28, 0xc000197fb0, 0x7, 0xc00009e000, 0x3, 0x4, 0x0, 0x0, 0x0, ...)
	/usr/local/go/src/cmd/go/internal/modload/load.go:1211 +0x5a
cmd/go/internal/modload.(*loader).load(0xc000148400, 0xc00025e2c0)
	/usr/local/go/src/cmd/go/internal/modload/load.go:1077 +0x3cf
cmd/go/internal/modload.(*loader).pkg.func1.1()
	/usr/local/go/src/cmd/go/internal/modload/load.go:959 +0x33
cmd/go/internal/par.(*Queue).Add.func1(0xc0000a8020, 0xc0001115c0)
	/usr/local/go/src/cmd/go/internal/par/queue.go:58 +0x7c
created by cmd/go/internal/par.(*Queue).Add
	/usr/local/go/src/cmd/go/internal/par/queue.go:56 +0x23d

goroutine 36 [GC assist wait]:
cmd/go/internal/imports.(*importReader).readByte(0xc00029b928, 0xc000032000)
	/usr/local/go/src/cmd/go/internal/imports/read.go:46 +0x14d
cmd/go/internal/imports.(*importReader).peekByte(0xc00029b928, 0x1, 0xc00029b901)
	/usr/local/go/src/cmd/go/internal/imports/read.go:77 +0x1c5
cmd/go/internal/imports.(*importReader).readKeyword(0xc00029b928, 0x16424ed, 0x7)
	/usr/local/go/src/cmd/go/internal/imports/read.go:125 +0x34
cmd/go/internal/imports.ReadImports(0x1712e60, 0xc000384200, 0x0, 0xc00029baa0, 0xc000384200, 0x0, 0x0, 0x0, 0x0)
	/usr/local/go/src/cmd/go/internal/imports/read.go:218 +0xae
cmd/go/internal/imports.scanFiles(0xc00039e800, 0x41, 0x80, 0xc000197fb0, 0x0, 0xc00039e800, 0x40, 0x80, 0xc000380060, 0x23, ...)
	/usr/local/go/src/cmd/go/internal/imports/scan.go:58 +0x252
cmd/go/internal/imports.ScanDir(0xc000380060, 0x23, 0xc000197fb0, 0x10e4485, 0xc00011a9f9, 0x2, 0x40, 0xffffffffffffffff, 0x0, 0x0, ...)
	/usr/local/go/src/cmd/go/internal/imports/scan.go:40 +0x20e
cmd/go/internal/modload.scanDir(0xc000380060, 0x23, 0xc000197fb0, 0x2, 0xc00009e000, 0x3, 0x4, 0x0, 0x0, 0x0, ...)
	/usr/local/go/src/cmd/go/internal/modload/load.go:1211 +0x5a
cmd/go/internal/modload.(*loader).load(0xc000148400, 0xc0000ac160)
	/usr/local/go/src/cmd/go/internal/modload/load.go:1077 +0x3cf
cmd/go/internal/modload.(*loader).pkg.func1.1()
	/usr/local/go/src/cmd/go/internal/modload/load.go:959 +0x33
cmd/go/internal/par.(*Queue).Add.func1(0xc0000a8030, 0xc0001115c0)
	/usr/local/go/src/cmd/go/internal/par/queue.go:58 +0x7c
created by cmd/go/internal/par.(*Queue).Add
	/usr/local/go/src/cmd/go/internal/par/queue.go:56 +0x23d

goroutine 38 [runnable]:
cmd/go/internal/imports.scanFiles(0xc0000e0400, 0x32, 0x40, 0xc000197fb0, 0x0, 0xc0000e0400, 0x20, 0x40, 0xc0000b8120, 0x25, ...)
	/usr/local/go/src/cmd/go/internal/imports/scan.go:70 +0x122
cmd/go/internal/imports.ScanDir(0xc0000b8120, 0x25, 0xc000197fb0, 0x10e4485, 0xc0000282f5, 0x4, 0x1431540, 0xffffffffffffffff, 0xc0000ac370, 0xc0000a6200, ...)
	/usr/local/go/src/cmd/go/internal/imports/scan.go:40 +0x20e
cmd/go/internal/modload.scanDir(0xc0000b8120, 0x25, 0xc000197fb0, 0x4, 0xc00009e000, 0x3, 0x4, 0x0, 0x0, 0x0, ...)
	/usr/local/go/src/cmd/go/internal/modload/load.go:1211 +0x5a
cmd/go/internal/modload.(*loader).load(0xc000148400, 0xc00025e0b0)
	/usr/local/go/src/cmd/go/internal/modload/load.go:1077 +0x3cf
cmd/go/internal/modload.(*loader).pkg.func1.1()
	/usr/local/go/src/cmd/go/internal/modload/load.go:959 +0x33
cmd/go/internal/par.(*Queue).Add.func1(0xc0000a8050, 0xc0001115c0)
	/usr/local/go/src/cmd/go/internal/par/queue.go:58 +0x7c
created by cmd/go/internal/par.(*Queue).Add
	/usr/local/go/src/cmd/go/internal/par/queue.go:56 +0x23d

goroutine 29 [runnable]:
cmd/go/internal/modload.(*loader).load(0xc000148400, 0xc000162bb0)
	/usr/local/go/src/cmd/go/internal/modload/load.go:1087 +0x4bd
cmd/go/internal/modload.(*loader).pkg.func1.1()
	/usr/local/go/src/cmd/go/internal/modload/load.go:959 +0x33
cmd/go/internal/par.(*Queue).Add.func1(0xc00012a0d0, 0xc0001115c0)
	/usr/local/go/src/cmd/go/internal/par/queue.go:58 +0x7c
created by cmd/go/internal/par.(*Queue).Add
	/usr/local/go/src/cmd/go/internal/par/queue.go:56 +0x23d
@dmitshur
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What macOS version were you using?

This may be the same as or related to #42700.

@aaronbee
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Big Sur 11.1

@cagedmantis cagedmantis changed the title go1.16beta1: SIGSEGV during 'go run' runtime: encountered a SIGSEGV during 'go run' in go1.16beta1 Dec 21, 2020
@cagedmantis cagedmantis added NeedsInvestigation Someone must examine and confirm this is a valid issue and not a duplicate of an existing one. OS-Darwin labels Dec 21, 2020
@cagedmantis cagedmantis added this to the Go1.16 milestone Dec 21, 2020
@cagedmantis
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As mentioned by @dmitshur, this could possibly be related to #42700

@cagedmantis
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/cc @aclements @randall77 @mknyszek @prattmic

@cherrymui
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Yeah, it is likely #42700 . I have seen a number of weird SIGSEGV or memory corruption with Rosetta 2. The new macOS 11.2 beta seems to make things better. Closing as a dup for now. (Feel free to reopen if you don't think so.)

Since you're building for ARM64 anyway, you can download an ARM64 toolchain from https://golang.org/dl/#go1.16beta1

@golang golang locked and limited conversation to collaborators Dec 21, 2021
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@cagedmantis @aaronbee @dmitshur @gopherbot @cherrymui