Closed
Description
What version of Go are you using (go version)?
$ go version go version go1.15 darwin/amd64
Does this issue reproduce with the latest release?
What operating system and processor architecture are you using (go env)?
go env Output
$ go env GO111MODULE="" GOARCH="amd64" GOBIN="" GOCACHE="/Users/uparmar/Library/Caches/go-build" GOENV="/Users/uparmar/Library/Application Support/go/env" GOEXE="" GOFLAGS="" GOHOSTARCH="amd64" GOHOSTOS="darwin" GOINSECURE="" GOMODCACHE="/Users/uparmar/go/pkg/mod" GONOPROXY="" GONOSUMDB="" GOOS="darwin" GOPATH="/Users/uparmar/go" GOPRIVATE="" GOPROXY="https://proxy.golang.org,direct" GOROOT="/usr/local/Cellar/go/1.15/libexec" GOSUMDB="sum.golang.org" GOTMPDIR="" GOTOOLDIR="/usr/local/Cellar/go/1.15/libexec/pkg/tool/darwin_amd64" GCCGO="gccgo" AR="ar" CC="clang" CXX="clang++" 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 -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/l7/x5hcvngd5m99k62kxv7srrdr0000gn/T/go-build448055941=/tmp/go-build -gno-record-gcc-switches -fno-common"
What did you do?
Call Go function from js(from chrome dev tools console)
// +build js, wasm
package main
import (
"net/http"
"syscall/js"
)
func test(this js.Value, args []js.Value) interface{} {
println("test called")
resp, err := http.Get("https://hacker-news.firebaseio.com/v0/item/24429478.json")
if err != nil {
println(err.Error())
return nil
}
defer resp.Body.Close()
var tmp []byte
resp.Body.Read(tmp)
println("response is", tmp)
return nil
}
func registerFuncs() {
js.Global().Set("test", js.FuncOf(test))
}
func main() {
c := make(chan struct{})
println("WASM Go Initialized")
registerFuncs()
<-c
}
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>Test</title>
</head>
<body>
<h1> TEST </h1>
</body>
<footer>
<script type="text/javascript" src="./wasm_exec.js"></script>
<script>
if (!WebAssembly.instantiateStreaming) { // polyfill
WebAssembly.instantiateStreaming = async (resp, importObject) => {
const source = await (await resp).arrayBuffer();
return await WebAssembly.instantiate(source, importObject);
};
}
const go = new Go();
let mod, inst;
WebAssembly.instantiateStreaming(fetch("test.wasm"), go.importObject).then(
async result => {
mod = result.module;
inst = result.instance;
go.run(inst)
}).catch((err) => {
console.error(err);
});
</script>
</footer>
</html>
What did you expect to see?
Function running succesfully
What did you see instead?
test()
wasm_exec.js:50 test called
wasm_exec.js:50 fatal error: all goroutines are asleep - deadlock!
wasm_exec.js:50
wasm_exec.js:50 goroutine 1 [chan receive]:
wasm_exec.js:50 main.main()
wasm_exec.js:50 /Users/uparmar/Development/test_wasm/test.go:33 +0x7
wasm_exec.js:50
wasm_exec.js:50 goroutine 6 [select]:
wasm_exec.js:50 net/http.(*Transport).RoundTrip(0x33c860, 0x486000, 0x33c860, 0x0, 0x0)
wasm_exec.js:50 /usr/local/Cellar/go/1.15/libexec/src/net/http/roundtrip_js.go:168 +0x55
wasm_exec.js:50 net/http.send(0x486000, 0xc8260, 0x33c860, 0x0, 0x0, 0x0, 0x0, 0x40c040, 0x424ab0, 0x1)
wasm_exec.js:50 /usr/local/Cellar/go/1.15/libexec/src/net/http/client.go:252 +0x5b
wasm_exec.js:50 net/http.(*Client).send(0x3490c0, 0x486000, 0x0, 0x0, 0x0, 0x40c040, 0x0, 0x1, 0xf8)
wasm_exec.js:50 /usr/local/Cellar/go/1.15/libexec/src/net/http/client.go:176 +0x13
wasm_exec.js:50 net/http.(*Client).do(0x3490c0, 0x486000, 0x0, 0x0, 0x0)
wasm_exec.js:50 /usr/local/Cellar/go/1.15/libexec/src/net/http/client.go:718 +0x38
wasm_exec.js:50 net/http.(*Client).Do(...)
wasm_exec.js:50 /usr/local/Cellar/go/1.15/libexec/src/net/http/client.go:586
wasm_exec.js:50 net/http.(*Client).Get(0x3490c0, 0x8c00d, 0x38, 0x41a138, 0x14a30008, 0x14a80007)
wasm_exec.js:50 /usr/local/Cellar/go/1.15/libexec/src/net/http/client.go:475 +0xe
wasm_exec.js:50 net/http.Get(...)
wasm_exec.js:50 /usr/local/Cellar/go/1.15/libexec/src/net/http/client.go:447
wasm_exec.js:50 main.test(0x0, 0x0, 0x368070, 0x0, 0x0, 0x0, 0x0)
wasm_exec.js:50 /Users/uparmar/Development/test_wasm/test.go:12 +0x7
wasm_exec.js:50 syscall/js.handleEvent()
wasm_exec.js:50 /usr/local/Cellar/go/1.15/libexec/src/syscall/js/func.go:96 +0x24
wasm_exec.js:141 exit code: 2