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x/mobile: "runtime/cgo: chdir" error appears in debug log on startup on iOS #41156

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curyous opened this issue Sep 1, 2020 · 4 comments
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@curyous
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@curyous curyous commented Sep 1, 2020

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

1.15

Does this issue reproduce with the latest release?

Yes

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

GO111MODULE="on"
GOARCH="amd64"
GOBIN=""
GOCACHE="/Users/<username>/Library/Caches/go-build"
GOENV="/Users/<username>/Library/Application Support/go/env"
GOEXE=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="darwin"
GOINSECURE=""
GOMODCACHE="/Users/<username>/dev/gowksp/pkg/mod"
GONOPROXY=""
GONOSUMDB=""
GOOS="darwin"
GOPATH="/Users/<username>/dev/gowksp"
GOPRIVATE=""
GOPROXY="https://proxy.golang.org,direct"
GOROOT="/usr/local/go"
GOSUMDB="sum.golang.org"
GOTMPDIR=""
GOTOOLDIR="/usr/local/go/pkg/tool/darwin_amd64"
GCCGO="gccgo"
AR="ar"
CC="clang"
CXX="clang++"
CGO_ENABLED="1"
GOMOD="/Users/<username>/dev/gowksp/src/github.com/curyous/adder/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/z8/x3j7np6x1cjbm_44396n2f680000gn/T/go-build960861663=/tmp/go-build -gno-record-gcc-switches -fno-common"

What did you do?

  • Made a tiny Go package with 1 function.
  • Built it into a framework using gomobile
  • Imported the framework and called the package within Swift code.
  • Debugged the app on on iPhone.

Here is an example project that produces the error:
https://github.com/curyous/gomobile-bug

What did you expect to see?

No problems logged on startup.

What did you see instead?

In debug log:

runtime/cgo: chdir(/private/var/containers/Bundle/Application/3CB0E6B1-721E-45F6-9C38-CA0EB8D971E6/GoMobile%20Bug.app) failed

@gopherbot gopherbot added this to the Unreleased milestone Sep 1, 2020
@dmitshur dmitshur changed the title x/mobile: Error appears in debug log on startup on iOS. runtime/cgo: chdir x/mobile: "runtime/cgo: chdir" error appears in debug log on startup on iOS Sep 3, 2020
@dmitshur
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@dmitshur dmitshur commented Sep 3, 2020

/cc @hyangah per owners.

@duyleekun
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@duyleekun duyleekun commented Oct 30, 2020

This also happens with go1.14.5 on ios 14.1

@nathan-fiscaletti
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@nathan-fiscaletti nathan-fiscaletti commented Dec 4, 2020

It looks like the responsible piece of code can be found here:

if (chdir(dir) != 0) {

@ZzzLazy
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@ZzzLazy ZzzLazy commented Apr 14, 2021

Deleting the spaces in "Product Name" in "Build Settings" worked for me

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