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fmt: stack overflow with self-referenced map #53237

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storozhukBM opened this issue Jun 5, 2022 · 4 comments
Closed

fmt: stack overflow with self-referenced map #53237

storozhukBM opened this issue Jun 5, 2022 · 4 comments
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@storozhukBM
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What version of Go are you using (go version)?

$ go version
go version go1.18.3 darwin/arm64

Does this issue reproduce with the latest release?

Yes

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

go env Output
$ go env
GO111MODULE=""
GOARCH="arm64"
GOBIN=""
GOCACHE="/Users/bohdanstorozhuk/Library/Caches/go-build"
GOENV="/Users/bohdanstorozhuk/Library/Application Support/go/env"
GOEXE=""
GOEXPERIMENT=""
GOFLAGS=""
GOHOSTARCH="arm64"
GOHOSTOS="darwin"
GOINSECURE=""
GOMODCACHE="/Users/bohdanstorozhuk/.gvm/pkgsets/go1.18.3/global/pkg/mod"
GONOPROXY=""
GONOSUMDB=""
GOOS="darwin"
GOPATH="/Users/bohdanstorozhuk/.gvm/pkgsets/go1.18.3/global"
GOPRIVATE=""
GOPROXY="https://proxy.golang.org,direct"
GOROOT="/Users/bohdanstorozhuk/.gvm/gos/go1.18.3"
GOSUMDB="sum.golang.org"
GOTMPDIR=""
GOTOOLDIR="/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/pkg/tool/darwin_arm64"
GOVCS=""
GOVERSION="go1.18.3"
GCCGO="gccgo"
AR="ar"
CC="clang"
CXX="clang++"
CGO_ENABLED="1"
GOMOD="/Users/bohdanstorozhuk/Projects/immcheck/go.mod"
GOWORK=""
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -arch arm64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/rj/q28sjpfs5bj72m96p09l5nqr0000gn/T/go-build4100448447=/tmp/go-build -gno-record-gcc-switches -fno-common"

What did you do?

func TestPrint(t *testing.T) {
	data := map[string]interface{}{}
	data["data"] = data
	fmt.Printf("%#v\n", data)
}

What did you expect to see?

Hard to tell, maybe:

map[string]interface {}{"data":(map[string]interface {})(0x1400000e038)}

What did you see instead?

fatal error: stack overflow Full stacktrace
runtime: goroutine stack exceeds 1000000000-byte limit

runtime: sp=0x140201c0380 stack=[0x140201c0000, 0x140401c0000]

fatal error: stack overflow


runtime stack:

runtime.throw({0x1023a0a99?, 0x1024a72a0?})

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/runtime/panic.go:992 +0x50

runtime.newstack()

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/runtime/stack.go:1101 +0x46c

runtime.morestack()

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/runtime/asm_arm64.s:314 +0x70


goroutine 18 [running]:

runtime.assertE2I2(0x1023e61a0?, {0x1023de5a0?, 0x1400925d320?})

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/runtime/iface.go:456 +0x84 fp=0x140201c0380 sp=0x140201c0380 pc=0x1022b1b64

fmt.(*pp).handleMethods(0x14000095380, 0x925d320?)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:590 +0xb8 fp=0x140201c05e0 sp=0x140201c0380 pc=0x102344ad8

fmt.(*pp).printValue(0x14000095380, {0x1023de5a0?, 0x1400925d320?, 0x0?}, 0x76, 0xea0e5)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:723 +0xa4 fp=0x140201c0810 sp=0x140201c05e0 pc=0x1023459b4

fmt.(*pp).printValue(0x14000095380, {0x1023e43c0?, 0x140000924b0?, 0x0?}, 0x76, 0xea0e4)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:778 +0x1b48 fp=0x140201c0a40 sp=0x140201c0810 pc=0x102347458

fmt.(*pp).printValue(0x14000095380, {0x1023e2140?, 0x1400925d310?, 0x0?}, 0x76, 0xea0e3)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:819 +0x6d0 fp=0x140201c0c70 sp=0x140201c0a40 pc=0x102345fe0

fmt.(*pp).printValue(0x14000095380, {0x1023e43c0?, 0x140000924b0?, 0x0?}, 0x76, 0xea0e2)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:780 +0x1bf4 fp=0x140201c0ea0 sp=0x140201c0c70 pc=0x102347504

fmt.(*pp).printValue(0x14000095380, {0x1023e2140?, 0x1400925d2f0?, 0x0?}, 0x76, 0xea0e1)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:819 +0x6d0 fp=0x140201c10d0 sp=0x140201c0ea0 pc=0x102345fe0

fmt.(*pp).printValue(0x14000095380, {0x1023e43c0?, 0x140000924b0?, 0x0?}, 0x76, 0xea0e0)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:780 +0x1bf4 fp=0x140201c1300 sp=0x140201c10d0 pc=0x102347504

fmt.(*pp).printValue(0x14000095380, {0x1023e2140?, 0x1400925d2d0?, 0x0?}, 0x76, 0xea0df)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:819 +0x6d0 fp=0x140201c1530 sp=0x140201c1300 pc=0x102345fe0

fmt.(*pp).printValue(0x14000095380, {0x1023e43c0?, 0x140000924b0?, 0x0?}, 0x76, 0xea0de)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:780 +0x1bf4 fp=0x140201c1760 sp=0x140201c1530 pc=0x102347504

fmt.(*pp).printValue(0x14000095380, {0x1023e2140?, 0x1400925d2b0?, 0x0?}, 0x76, 0xea0dd)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:819 +0x6d0 fp=0x140201c1990 sp=0x140201c1760 pc=0x102345fe0

fmt.(*pp).printValue(0x14000095380, {0x1023e43c0?, 0x140000924b0?, 0x0?}, 0x76, 0xea0dc)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:780 +0x1bf4 fp=0x140201c1bc0 sp=0x140201c1990 pc=0x102347504

fmt.(*pp).printValue(0x14000095380, {0x1023e2140?, 0x1400925d290?, 0x0?}, 0x76, 0xea0db)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:819 +0x6d0 fp=0x140201c1df0 sp=0x140201c1bc0 pc=0x102345fe0

fmt.(*pp).printValue(0x14000095380, {0x1023e43c0?, 0x140000924b0?, 0x0?}, 0x76, 0xea0da)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:780 +0x1bf4 fp=0x140201c2020 sp=0x140201c1df0 pc=0x102347504

fmt.(*pp).printValue(0x14000095380, {0x1023e2140?, 0x1400925d270?, 0x0?}, 0x76, 0xea0d9)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:819 +0x6d0 fp=0x140201c2250 sp=0x140201c2020 pc=0x102345fe0

fmt.(*pp).printValue(0x14000095380, {0x1023e43c0?, 0x140000924b0?, 0x0?}, 0x76, 0xea0d8)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:780 +0x1bf4 fp=0x140201c2480 sp=0x140201c2250 pc=0x102347504

fmt.(*pp).printValue(0x14000095380, {0x1023e2140?, 0x1400925d250?, 0x0?}, 0x76, 0xea0d7)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:819 +0x6d0 fp=0x140201c26b0 sp=0x140201c2480 pc=0x102345fe0

fmt.(*pp).printValue(0x14000095380, {0x1023e43c0?, 0x140000924b0?, 0x0?}, 0x76, 0xea0d6)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:780 +0x1bf4 fp=0x140201c28e0 sp=0x140201c26b0 pc=0x102347504

fmt.(*pp).printValue(0x14000095380, {0x1023e2140?, 0x1400925d230?, 0x0?}, 0x76, 0xea0d5)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:819 +0x6d0 fp=0x140201c2b10 sp=0x140201c28e0 pc=0x102345fe0

fmt.(*pp).printValue(0x14000095380, {0x1023e43c0?, 0x140000924b0?, 0x0?}, 0x76, 0xea0d4)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:780 +0x1bf4 fp=0x140201c2d40 sp=0x140201c2b10 pc=0x102347504

fmt.(*pp).printValue(0x14000095380, {0x1023e2140?, 0x1400925d210?, 0x0?}, 0x76, 0xea0d3)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:819 +0x6d0 fp=0x140201c2f70 sp=0x140201c2d40 pc=0x102345fe0

fmt.(*pp).printValue(0x14000095380, {0x1023e43c0?, 0x140000924b0?, 0x0?}, 0x76, 0xea0d2)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:780 +0x1bf4 fp=0x140201c31a0 sp=0x140201c2f70 pc=0x102347504

fmt.(*pp).printValue(0x14000095380, {0x1023e2140?, 0x1400925d1f0?, 0x0?}, 0x76, 0xea0d1)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:819 +0x6d0 fp=0x140201c33d0 sp=0x140201c31a0 pc=0x102345fe0

fmt.(*pp).printValue(0x14000095380, {0x1023e43c0?, 0x140000924b0?, 0x0?}, 0x76, 0xea0d0)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:780 +0x1bf4 fp=0x140201c3600 sp=0x140201c33d0 pc=0x102347504

fmt.(*pp).printValue(0x14000095380, {0x1023e2140?, 0x1400925d1d0?, 0x0?}, 0x76, 0xea0cf)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:819 +0x6d0 fp=0x140201c3830 sp=0x140201c3600 pc=0x102345fe0

fmt.(*pp).printValue(0x14000095380, {0x1023e43c0?, 0x140000924b0?, 0x0?}, 0x76, 0xea0ce)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:780 +0x1bf4 fp=0x140201c3a60 sp=0x140201c3830 pc=0x102347504

fmt.(*pp).printValue(0x14000095380, {0x1023e2140?, 0x1400925d1b0?, 0x0?}, 0x76, 0xea0cd)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:819 +0x6d0 fp=0x140201c3c90 sp=0x140201c3a60 pc=0x102345fe0

fmt.(*pp).printValue(0x14000095380, {0x1023e43c0?, 0x140000924b0?, 0x0?}, 0x76, 0xea0cc)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:780 +0x1bf4 fp=0x140201c3ec0 sp=0x140201c3c90 pc=0x102347504

fmt.(*pp).printValue(0x14000095380, {0x1023e2140?, 0x1400925d190?, 0x0?}, 0x76, 0xea0cb)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:819 +0x6d0 fp=0x140201c40f0 sp=0x140201c3ec0 pc=0x102345fe0

fmt.(*pp).printValue(0x14000095380, {0x1023e43c0?, 0x140000924b0?, 0x0?}, 0x76, 0xea0ca)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:780 +0x1bf4 fp=0x140201c4320 sp=0x140201c40f0 pc=0x102347504

fmt.(*pp).printValue(0x14000095380, {0x1023e2140?, 0x1400925d170?, 0x0?}, 0x76, 0xea0c9)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:819 +0x6d0 fp=0x140201c4550 sp=0x140201c4320 pc=0x102345fe0

fmt.(*pp).printValue(0x14000095380, {0x1023e43c0?, 0x140000924b0?, 0x0?}, 0x76, 0xea0c8)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:780 +0x1bf4 fp=0x140201c4780 sp=0x140201c4550 pc=0x102347504

fmt.(*pp).printValue(0x14000095380, {0x1023e2140?, 0x1400925d150?, 0x0?}, 0x76, 0xea0c7)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:819 +0x6d0 fp=0x140201c49b0 sp=0x140201c4780 pc=0x102345fe0

fmt.(*pp).printValue(0x14000095380, {0x1023e43c0?, 0x140000924b0?, 0x0?}, 0x76, 0xea0c6)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:780 +0x1bf4 fp=0x140201c4be0 sp=0x140201c49b0 pc=0x102347504

fmt.(*pp).printValue(0x14000095380, {0x1023e2140?, 0x1400925d130?, 0x0?}, 0x76, 0xea0c5)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:819 +0x6d0 fp=0x140201c4e10 sp=0x140201c4be0 pc=0x102345fe0

fmt.(*pp).printValue(0x14000095380, {0x1023e43c0?, 0x140000924b0?, 0x0?}, 0x76, 0xea0c4)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:780 +0x1bf4 fp=0x140201c5040 sp=0x140201c4e10 pc=0x102347504

fmt.(*pp).printValue(0x14000095380, {0x1023e2140?, 0x1400925d110?, 0x0?}, 0x76, 0xea0c3)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:819 +0x6d0 fp=0x140201c5270 sp=0x140201c5040 pc=0x102345fe0

fmt.(*pp).printValue(0x14000095380, {0x1023e43c0?, 0x140000924b0?, 0x0?}, 0x76, 0xea0c2)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:780 +0x1bf4 fp=0x140201c54a0 sp=0x140201c5270 pc=0x102347504

fmt.(*pp).printValue(0x14000095380, {0x1023e2140?, 0x1400925d0f0?, 0x0?}, 0x76, 0xea0c1)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:819 +0x6d0 fp=0x140201c56d0 sp=0x140201c54a0 pc=0x102345fe0

fmt.(*pp).printValue(0x14000095380, {0x1023e43c0?, 0x140000924b0?, 0x0?}, 0x76, 0xea0c0)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:780 +0x1bf4 fp=0x140201c5900 sp=0x140201c56d0 pc=0x102347504

fmt.(*pp).printValue(0x14000095380, {0x1023e2140?, 0x1400925d0d0?, 0x0?}, 0x76, 0xea0bf)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:819 +0x6d0 fp=0x140201c5b30 sp=0x140201c5900 pc=0x102345fe0

fmt.(*pp).printValue(0x14000095380, {0x1023e43c0?, 0x140000924b0?, 0x0?}, 0x76, 0xea0be)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:780 +0x1bf4 fp=0x140201c5d60 sp=0x140201c5b30 pc=0x102347504

fmt.(*pp).printValue(0x14000095380, {0x1023e2140?, 0x1400925d0b0?, 0x0?}, 0x76, 0xea0bd)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:819 +0x6d0 fp=0x140201c5f90 sp=0x140201c5d60 pc=0x102345fe0

fmt.(*pp).printValue(0x14000095380, {0x1023e43c0?, 0x140000924b0?, 0x0?}, 0x76, 0xea0bc)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:780 +0x1bf4 fp=0x140201c61c0 sp=0x140201c5f90 pc=0x102347504

fmt.(*pp).printValue(0x14000095380, {0x1023e2140?, 0x1400925d090?, 0x0?}, 0x76, 0xea0bb)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:819 +0x6d0 fp=0x140201c63f0 sp=0x140201c61c0 pc=0x102345fe0

fmt.(*pp).printValue(0x14000095380, {0x1023e43c0?, 0x140000924b0?, 0x0?}, 0x76, 0xea0ba)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:780 +0x1bf4 fp=0x140201c6620 sp=0x140201c63f0 pc=0x102347504

fmt.(*pp).printValue(0x14000095380, {0x1023e2140?, 0x1400925d070?, 0x0?}, 0x76, 0xea0b9)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:819 +0x6d0 fp=0x140201c6850 sp=0x140201c6620 pc=0x102345fe0

fmt.(*pp).printValue(0x14000095380, {0x1023e43c0?, 0x140000924b0?, 0x0?}, 0x76, 0xea0b8)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:780 +0x1bf4 fp=0x140201c6a80 sp=0x140201c6850 pc=0x102347504

fmt.(*pp).printValue(0x14000095380, {0x1023e2140?, 0x1400925d050?, 0x0?}, 0x76, 0xea0b7)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:819 +0x6d0 fp=0x140201c6cb0 sp=0x140201c6a80 pc=0x102345fe0

fmt.(*pp).printValue(0x14000095380, {0x1023e43c0?, 0x140000924b0?, 0x0?}, 0x76, 0xea0b6)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:780 +0x1bf4 fp=0x140201c6ee0 sp=0x140201c6cb0 pc=0x102347504

fmt.(*pp).printValue(0x14000095380, {0x1023e2140?, 0x1400925d030?, 0x0?}, 0x76, 0xea0b5)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:819 +0x6d0 fp=0x140201c7110 sp=0x140201c6ee0 pc=0x102345fe0

fmt.(*pp).printValue(0x14000095380, {0x1023e43c0?, 0x140000924b0?, 0x0?}, 0x76, 0xea0b4)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:780 +0x1bf4 fp=0x140201c7340 sp=0x140201c7110 pc=0x102347504

fmt.(*pp).printValue(0x14000095380, {0x1023e2140?, 0x1400925d010?, 0x0?}, 0x76, 0xea0b3)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:819 +0x6d0 fp=0x140201c7570 sp=0x140201c7340 pc=0x102345fe0

fmt.(*pp).printValue(0x14000095380, {0x1023e43c0?, 0x140000924b0?, 0x0?}, 0x76, 0xea0b2)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:780 +0x1bf4 fp=0x140201c77a0 sp=0x140201c7570 pc=0x102347504

fmt.(*pp).printValue(0x14000095380, {0x1023e2140?, 0x1400925cff0?, 0x0?}, 0x76, 0xea0b1)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:819 +0x6d0 fp=0x140201c79d0 sp=0x140201c77a0 pc=0x102345fe0

fmt.(*pp).printValue(0x14000095380, {0x1023e43c0?, 0x140000924b0?, 0x0?}, 0x76, 0xea0b0)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:780 +0x1bf4 fp=0x140201c7c00 sp=0x140201c79d0 pc=0x102347504

fmt.(*pp).printValue(0x14000095380, {0x1023e2140?, 0x1400925cfd0?, 0x0?}, 0x76, 0xea0af)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:819 +0x6d0 fp=0x140201c7e30 sp=0x140201c7c00 pc=0x102345fe0

fmt.(*pp).printValue(0x14000095380, {0x1023e43c0?, 0x140000924b0?, 0x0?}, 0x76, 0xea0ae)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:780 +0x1bf4 fp=0x140201c8060 sp=0x140201c7e30 pc=0x102347504

fmt.(*pp).printValue(0x14000095380, {0x1023e2140?, 0x1400925cfb0?, 0x0?}, 0x76, 0xea0ad)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:819 +0x6d0 fp=0x140201c8290 sp=0x140201c8060 pc=0x102345fe0

fmt.(*pp).printValue(0x14000095380, {0x1023e43c0?, 0x140000924b0?, 0x0?}, 0x76, 0xea0ac)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:780 +0x1bf4 fp=0x140201c84c0 sp=0x140201c8290 pc=0x102347504

fmt.(*pp).printValue(0x14000095380, {0x1023e2140?, 0x1400925cf90?, 0x0?}, 0x76, 0xea0ab)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:819 +0x6d0 fp=0x140201c86f0 sp=0x140201c84c0 pc=0x102345fe0

fmt.(*pp).printValue(0x14000095380, {0x1023e43c0?, 0x140000924b0?, 0x0?}, 0x76, 0xea0aa)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:780 +0x1bf4 fp=0x140201c8920 sp=0x140201c86f0 pc=0x102347504

fmt.(*pp).printValue(0x14000095380, {0x1023e2140?, 0x1400925cf70?, 0x0?}, 0x76, 0xea0a9)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:819 +0x6d0 fp=0x140201c8b50 sp=0x140201c8920 pc=0x102345fe0

fmt.(*pp).printValue(0x14000095380, {0x1023e43c0?, 0x140000924b0?, 0x1022b3a4c?}, 0x76, 0xea0a8)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:780 +0x1bf4 fp=0x140201c8d80 sp=0x140201c8b50 pc=0x102347504

fmt.(*pp).printValue(0x14000095380, {0x1023e2140?, 0x1400925cf50?, 0x0?}, 0x76, 0xea0a7)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:819 +0x6d0 fp=0x140201c8fb0 sp=0x140201c8d80 pc=0x102345fe0

fmt.(*pp).printValue(0x14000095380, {0x1023e43c0?, 0x140000924b0?, 0x0?}, 0x76, 0xea0a6)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:780 +0x1bf4 fp=0x140201c91e0 sp=0x140201c8fb0 pc=0x102347504

fmt.(*pp).printValue(0x14000095380, {0x1023e2140?, 0x1400925cf30?, 0x0?}, 0x76, 0xea0a5)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:819 +0x6d0 fp=0x140201c9410 sp=0x140201c91e0 pc=0x102345fe0

fmt.(*pp).printValue(0x14000095380, {0x1023e43c0?, 0x140000924b0?, 0x0?}, 0x76, 0xea0a4)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:780 +0x1bf4 fp=0x140201c9640 sp=0x140201c9410 pc=0x102347504

fmt.(*pp).printValue(0x14000095380, {0x1023e2140?, 0x1400925cf10?, 0x0?}, 0x76, 0xea0a3)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:819 +0x6d0 fp=0x140201c9870 sp=0x140201c9640 pc=0x102345fe0

fmt.(*pp).printValue(0x14000095380, {0x1023e43c0?, 0x140000924b0?, 0x0?}, 0x76, 0xea0a2)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:780 +0x1bf4 fp=0x140201c9aa0 sp=0x140201c9870 pc=0x102347504

fmt.(*pp).printValue(0x14000095380, {0x1023e2140?, 0x1400925cef0?, 0x0?}, 0x76, 0xea0a1)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:819 +0x6d0 fp=0x140201c9cd0 sp=0x140201c9aa0 pc=0x102345fe0

fmt.(*pp).printValue(0x14000095380, {0x1023e43c0?, 0x140000924b0?, 0x0?}, 0x76, 0xea0a0)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:780 +0x1bf4 fp=0x140201c9f00 sp=0x140201c9cd0 pc=0x102347504

fmt.(*pp).printValue(0x14000095380, {0x1023e2140?, 0x1400925ced0?, 0x0?}, 0x76, 0xea09f)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:819 +0x6d0 fp=0x140201ca130 sp=0x140201c9f00 pc=0x102345fe0

fmt.(*pp).printValue(0x14000095380, {0x1023e43c0?, 0x140000924b0?, 0x0?}, 0x76, 0xea09e)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:780 +0x1bf4 fp=0x140201ca360 sp=0x140201ca130 pc=0x102347504

fmt.(*pp).printValue(0x14000095380, {0x1023e2140?, 0x1400925ceb0?, 0x0?}, 0x76, 0xea09d)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:819 +0x6d0 fp=0x140201ca590 sp=0x140201ca360 pc=0x102345fe0

fmt.(*pp).printValue(0x14000095380, {0x1023e43c0?, 0x140000924b0?, 0x0?}, 0x76, 0xea09c)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:780 +0x1bf4 fp=0x140201ca7c0 sp=0x140201ca590 pc=0x102347504

fmt.(*pp).printValue(0x14000095380, {0x1023e2140?, 0x1400925ce90?, 0x0?}, 0x76, 0xea09b)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:819 +0x6d0 fp=0x140201ca9f0 sp=0x140201ca7c0 pc=0x102345fe0

fmt.(*pp).printValue(0x14000095380, {0x1023e43c0?, 0x140000924b0?, 0x0?}, 0x76, 0xea09a)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:780 +0x1bf4 fp=0x140201cac20 sp=0x140201ca9f0 pc=0x102347504

fmt.(*pp).printValue(0x14000095380, {0x1023e2140?, 0x1400925ce70?, 0x0?}, 0x76, 0xea099)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:819 +0x6d0 fp=0x140201cae50 sp=0x140201cac20 pc=0x102345fe0

fmt.(*pp).printValue(0x14000095380, {0x1023e43c0?, 0x140000924b0?, 0x0?}, 0x76, 0xea098)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:780 +0x1bf4 fp=0x140201cb080 sp=0x140201cae50 pc=0x102347504

fmt.(*pp).printValue(0x14000095380, {0x1023e2140?, 0x1400925ce50?, 0x0?}, 0x76, 0xea097)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:819 +0x6d0 fp=0x140201cb2b0 sp=0x140201cb080 pc=0x102345fe0

fmt.(*pp).printValue(0x14000095380, {0x1023e43c0?, 0x140000924b0?, 0x0?}, 0x76, 0xea096)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:780 +0x1bf4 fp=0x140201cb4e0 sp=0x140201cb2b0 pc=0x102347504

fmt.(*pp).printValue(0x14000095380, {0x1023e2140?, 0x1400925ce30?, 0x0?}, 0x76, 0xea095)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:819 +0x6d0 fp=0x140201cb710 sp=0x140201cb4e0 pc=0x102345fe0

fmt.(*pp).printValue(0x14000095380, {0x1023e43c0?, 0x140000924b0?, 0x0?}, 0x76, 0xea094)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:780 +0x1bf4 fp=0x140201cb940 sp=0x140201cb710 pc=0x102347504

fmt.(*pp).printValue(0x14000095380, {0x1023e2140?, 0x1400925ce10?, 0x0?}, 0x76, 0xea093)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:819 +0x6d0 fp=0x140201cbb70 sp=0x140201cb940 pc=0x102345fe0

fmt.(*pp).printValue(0x14000095380, {0x1023e43c0?, 0x140000924b0?, 0x0?}, 0x76, 0xea092)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:780 +0x1bf4 fp=0x140201cbda0 sp=0x140201cbb70 pc=0x102347504

fmt.(*pp).printValue(0x14000095380, {0x1023e2140?, 0x1400925cdf0?, 0x0?}, 0x76, 0xea091)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:819 +0x6d0 fp=0x140201cbfd0 sp=0x140201cbda0 pc=0x102345fe0

fmt.(*pp).printValue(0x14000095380, {0x1023e43c0?, 0x140000924b0?, 0x0?}, 0x76, 0xea090)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:780 +0x1bf4 fp=0x140201cc200 sp=0x140201cbfd0 pc=0x102347504

fmt.(*pp).printValue(0x14000095380, {0x1023e2140?, 0x1400925cdd0?, 0x0?}, 0x76, 0xea08f)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:819 +0x6d0 fp=0x140201cc430 sp=0x140201cc200 pc=0x102345fe0

fmt.(*pp).printValue(0x14000095380, {0x1023e43c0?, 0x140000924b0?, 0x0?}, 0x76, 0xea08e)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:780 +0x1bf4 fp=0x140201cc660 sp=0x140201cc430 pc=0x102347504

fmt.(*pp).printValue(0x14000095380, {0x1023e2140?, 0x1400925cdb0?, 0x0?}, 0x76, 0xea08d)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:819 +0x6d0 fp=0x140201cc890 sp=0x140201cc660 pc=0x102345fe0

fmt.(*pp).printValue(0x14000095380, {0x1023e43c0?, 0x140000924b0?, 0x0?}, 0x76, 0xea08c)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:780 +0x1bf4 fp=0x140201ccac0 sp=0x140201cc890 pc=0x102347504

fmt.(*pp).printValue(0x14000095380, {0x1023e2140?, 0x1400925cd90?, 0x0?}, 0x76, 0xea08b)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:819 +0x6d0 fp=0x140201cccf0 sp=0x140201ccac0 pc=0x102345fe0

fmt.(*pp).printValue(0x14000095380, {0x1023e43c0?, 0x140000924b0?, 0x0?}, 0x76, 0xea08a)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:780 +0x1bf4 fp=0x140201ccf20 sp=0x140201cccf0 pc=0x102347504

fmt.(*pp).printValue(0x14000095380, {0x1023e2140?, 0x1400925cd70?, 0x0?}, 0x76, 0xea089)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:819 +0x6d0 fp=0x140201cd150 sp=0x140201ccf20 pc=0x102345fe0

fmt.(*pp).printValue(0x14000095380, {0x1023e43c0?, 0x140000924b0?, 0x0?}, 0x76, 0xea088)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:780 +0x1bf4 fp=0x140201cd380 sp=0x140201cd150 pc=0x102347504

fmt.(*pp).printValue(0x14000095380, {0x1023e2140?, 0x1400925cd50?, 0x0?}, 0x76, 0xea087)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:819 +0x6d0 fp=0x140201cd5b0 sp=0x140201cd380 pc=0x102345fe0

fmt.(*pp).printValue(0x14000095380, {0x1023e43c0?, 0x140000924b0?, 0x0?}, 0x76, 0xea086)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:780 +0x1bf4 fp=0x140201cd7e0 sp=0x140201cd5b0 pc=0x102347504

fmt.(*pp).printValue(0x14000095380, {0x1023e2140?, 0x1400925cd30?, 0x0?}, 0x76, 0xea085)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:819 +0x6d0 fp=0x140201cda10 sp=0x140201cd7e0 pc=0x102345fe0

fmt.(*pp).printValue(0x14000095380, {0x1023e43c0?, 0x140000924b0?, 0x0?}, 0x76, 0xea084)

/Users/bohdanstorozhuk/.gvm/gos/go1.18.3/src/fmt/print.go:780 +0x1bf4 fp=0x140201cdc40 sp=0x140201cda10 pc=0x102347504

...additional frames elided...
@robpike
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robpike commented Jun 5, 2022

My unfriendly but honest response is, don't do that. In general fmt has problems with pathological data, and the fix is potentially too expensive.

@storozhukBM
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@robpike
I do not insist on it, but it already detects regular pointers and empty interface cycles, so I thought it could also be implemented for maps.

@dsnet
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dsnet commented Jun 5, 2022

it already detects regular pointers

I'm not sure that's the case. It just doesn't follow pointers, which isn't really a "cycle-detection" strategy per-say.

Not only does it not detect cyclic maps, it also doesn't detect cyclic slices.

At least currently, the behavior is documented:

Infinite recursion can also be triggered by self-referential data structures, such as a slice that contains itself as an element, if that type has a String method. Such pathologies are rare, however, and the package does not protect against them.

@seankhliao
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Duplicate of #44942 #8241

@golang golang locked and limited conversation to collaborators Jun 5, 2023
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@storozhukBM @robpike @dsnet @gopherbot @seankhliao