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sort: Slice fails to sort subslices (sometimes) #42089

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ghost opened this issue Oct 20, 2020 · 1 comment
Closed

sort: Slice fails to sort subslices (sometimes) #42089

ghost opened this issue Oct 20, 2020 · 1 comment
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@ghost
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ghost commented Oct 20, 2020

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

$ go version
go version go1.15.3 linux/amd64

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="amd64"
GOBIN=""
GOCACHE="/home/xxx/.cache/go-build"
GOENV="/home/xxx/.config/go/env"
GOEXE=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOINSECURE=""
GOMODCACHE="/home/xxx/gocode/pkg/mod"
GONOPROXY=""
GONOSUMDB=""
GOOS="linux"
GOPATH="/home/xxx/gocode"
GOPRIVATE=""
GOPROXY="direct"
GOROOT="/home/xxx/go"
GOSUMDB="off"
GOTMPDIR=""
GOTOOLDIR="/home/xxx/go/pkg/tool/linux_amd64"
GCCGO="gccgo"
AR="ar"
CC="gcc"
CXX="g++"
CGO_ENABLED="1"
GOMOD=""
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -m64 -pthread -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build010487569=/tmp/go-build -gno-record-gcc-switches"
r

What did you do?

https://play.golang.org/p/soXZlKQ2pRF

What did you expect to see?

I expected the subslice to be sorted and the output to be after: [1 2].

What did you see instead?

The subslice wasn't sorted. The output is after: [2 1].

sort.SliceStable doesn't work in this case, too.
@ghost
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ghost commented Oct 20, 2020

Sorry, it was my mistake.

@ghost ghost closed this as completed Oct 20, 2020
@golang golang locked and limited conversation to collaborators Oct 20, 2021
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