net/http: WASM http.Get fails to read response and deadlocks when called in event listener

[soypat]

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

$ go version
go version go1.17.9 linux/amd64

Does this issue reproduce with the latest release?

It is my understanding an issue of this type would be fixed in both 1.17 and 1.18 latest versions, so yes?

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

GOOS=js GOARCH=wasm. For desktop application as follows:

go env Output

$ go env

GO111MODULE=""

GOARCH="386"

GOBIN="/home/pato/local/bin"

GOCACHE="/home/pato/.cache/go-build"

GOENV="/home/pato/.config/go/env"

GOEXE=""

GOEXPERIMENT=""

GOFLAGS=""

GOHOSTARCH="386"

GOHOSTOS="linux"

GOINSECURE=""

GOMODCACHE="/home/pato/go/pkg/mod"

GONOPROXY="github.com/LIA-Aerospace"

GONOSUMDB="github.com/LIA-Aerospace"

GOOS="linux"

GOPATH="/home/pato/go"

GOPRIVATE="github.com/LIA-Aerospace"

GOPROXY="https://proxy.golang.org,direct"

GOROOT="/usr/local/go"

GOSUMDB="sum.golang.org"

GOTMPDIR=""

GOTOOLDIR="/usr/local/go/pkg/tool/linux_386"

GOVCS=""

GOVERSION="go1.17.9"

GCCGO="gccgo"

GO386="sse2"

AR="ar"

CC="gcc"

CXX="g++"

CGO_ENABLED="1"

GOMOD="/home/pato/Desktop/3dprint/wasm-listener-bug/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 -m32 -pthread -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build434021559=/tmp/go-build -gno-record-gcc-switches"

What did you do?

1. Run following program https://github.com/soypat/wasm-listener-bug

git clone https://github.com/soypat/wasm-listener-bug wbug && cd wbug && go run .

2. Head on over to http://[::]:8080/
3. Click button
4. See console log

What did you expect to see?

Error printout or success message. for http.Get attempt

What did you see instead?

Panic at https://github.com/soypat/wasm-listener-bug/blob/main/app/client.go#L60

fatal error: all goroutines are asleep - deadlock!

wasm_exec.js:51

wasm_exec.js:51 goroutine 1 [select (no cases)]:

wasm_exec.js:51 github.com/hexops/vecty.RenderBody({0xce1f0, 0x434050})

wasm_exec.js:51 	/home/pato/go/pkg/mod/github.com/hexops/vecty@v0.6.0/dom.go:1195 +0x1e

wasm_exec.js:51 main.main()

wasm_exec.js:51 	/home/pato/Desktop/3dprint/wasmbug/app/client.go:47 +0x32

wasm_exec.js:51

wasm_exec.js:51 goroutine 6 [select]:

wasm_exec.js:51 net/http.(*Transport).RoundTrip(0x353fa0, 0x42e000)

wasm_exec.js:51 	/usr/local/go/src/net/http/roundtrip_js.go:170 +0x8d

wasm_exec.js:51 net/http.send(0x42e000, {0xc8c60, 0x353fa0}, {0x0, 0x0, 0x0})

wasm_exec.js:51 	/usr/local/go/src/net/http/client.go:252 +0x8b

wasm_exec.js:51 net/http.(*Client).send(0x360d20, 0x42e000, {0x0, 0x0, 0x0})

wasm_exec.js:51 	/usr/local/go/src/net/http/client.go:176 +0x11

wasm_exec.js:51 net/http.(*Client).do(0x360d20, 0x42e000)

wasm_exec.js:51 	/usr/local/go/src/net/http/client.go:725 +0xb5

wasm_exec.js:51 net/http.(*Client).Do(...)

wasm_exec.js:51 	/usr/local/go/src/net/http/client.go:593

wasm_exec.js:51 net/http.(*Client).Get(0x360d20, {0x76a54, 0x10})

wasm_exec.js:51 	/usr/local/go/src/net/http/client.go:480 +0xe

wasm_exec.js:51 net/http.Get(...)

wasm_exec.js:51 	/usr/local/go/src/net/http/client.go:449

wasm_exec.js:51 main.updateShape()

wasm_exec.js:51 	/home/pato/Desktop/3dprint/wasmbug/app/client.go:65 +0x4

wasm_exec.js:51 main.addShapeListener.func1({0x260c0, 0x3832c8})

wasm_exec.js:51 	/home/pato/Desktop/3dprint/wasmbug/app/client.go:60 +0x2

wasm_exec.js:51 vecty-templater-project/app/store.(*listenerRegistry).Fire(0x40c038, {0x260c0, 0x3832c8})

wasm_exec.js:51 	/home/pato/Desktop/3dprint/wasmbug/app/store/listener.go:40 +0xa

wasm_exec.js:51 vecty-templater-project/app/store.OnAction({0x260c0, 0x3832c8})

wasm_exec.js:51 	/home/pato/Desktop/3dprint/wasmbug/app/store/store.go:49 +0x21

wasm_exec.js:51 vecty-templater-project/app/store/actions.Dispatch({0x260c0, 0x3832c8})

wasm_exec.js:51 	/home/pato/Desktop/3dprint/wasmbug/app/store/actions/dispatcher.go:14 +0x8

wasm_exec.js:51 vecty-templater-project/app/views.(*Body).newItem(...)

wasm_exec.js:51 	/home/pato/Desktop/3dprint/wasmbug/app/views/body.go:46

wasm_exec.js:51 github.com/hexops/vecty.(*HTML).reconcileProperties.func1({0xd12d8, 0x42cd00}, {0x42cce0, 0x1, 0x1})

wasm_exec.js:51 	/home/pato/go/pkg/mod/github.com/hexops/vecty@v0.6.0/dom.go:246 +0x1f

wasm_exec.js:51 github.com/hexops/vecty.funcOf.func1({{}, 0x7ff800010000002f, 0x49c4c0}, {0x42ccd0, 0x1, 0x1})

wasm_exec.js:51 	/home/pato/go/pkg/mod/github.com/hexops/vecty@v0.6.0/dom_js.go:60 +0x10

wasm_exec.js:51 syscall/js.handleEvent()

wasm_exec.js:51 	/usr/local/go/src/syscall/js/func.go:96 +0x27

wasm_exec.js:151 exit code: 2

[seankhliao]

Duplicate of #43298