mist on qt 5.4.0 panic: unsupported variant type: 1024 (QJSValue)

[jorisbontje]

With QT 5.4.0, works fine on QT 5.3.2.

$ mist
2014/12/16 12:53:26 [CLI] Main address e71de707f05da29b62325a19cf1e24f452f95684
2014/12/16 12:53:36 [CHAIN] Last block (#0) 779b1b620b03c0fb24963e183d5e88e3dbe4484e3f6e2aa05942e3be7b48e179
ETH stack took 10.019111037s
2014/12/16 12:53:36 [GUI] Starting GUI
2014/12/16 12:53:36 [CLI] Starting Mist/v0.7.9/darwin/go1.4
2014/12/16 12:53:36 [SERV] Ready and accepting connections
2014/12/16 12:53:36 [JSRE] started
panic: unsupported variant type: 1024 (QJSValue)

goroutine 1 [running, locked to thread]:
gopkg.in/qml%2ev1.hookPanic(0x12d22200)
    /private/tmp/go-ethereum-49DUTo/src/gopkg.in/qml.v1/bridge.go:631 +0x8d
gopkg.in/qml%2ev1._Cfunc_componentCreateWindow(0xee03c40, 0x0, 0x0)
    /private/tmp/go-ethereum-49DUTo/src/gopkg.in/qml.v1/:83 +0x44
gopkg.in/qml%2ev1.func·026()
    /private/tmp/go-ethereum-49DUTo/src/gopkg.in/qml.v1/qml.go:750 +0x56
gopkg.in/qml%2ev1.hookIdleTimer()
    /private/tmp/go-ethereum-49DUTo/src/gopkg.in/qml.v1/bridge.go:190 +0x60
gopkg.in/qml%2ev1._Cfunc_applicationExec()
    /private/tmp/go-ethereum-49DUTo/src/gopkg.in/qml.v1/:59 +0x45
gopkg.in/qml%2ev1.Run(0x4aa3510, 0x0, 0x0)
    /private/tmp/go-ethereum-49DUTo/src/gopkg.in/qml.v1/bridge.go:63 +0x204
main.main()
    /private/tmp/go-ethereum-49DUTo/src/github.com/ethereum/go-ethereum/cmd/mist/main.go:94 +0x72

[tgerring]

I was able to work around this bug by downgrading to 5.3.2 and clearing out some old packages:

First, force checkout the specific commit for QT 5.3.2 in brew:

cd $( brew --prefix ) && git checkout 4f25f52 /usr/local/Library/Formula/qt5.rb

Update environment variables to point to 5.3.2:

export PKG_CONFIG_PATH=/usr/local/Cellar/qt5/5.3.2/lib/pkgconfig
export CGO_CPPFLAGS="-I/usr/local/Cellar/qt5/5.3.2/include/QtCore/5.3.2/QtCore"
export LD_LIBRARY_PATH=/usr/local/Cellar/qt5/5.3.2/lib

Remove QML references and re-get all dependencies:

rm -rf $GOPATH/src/gopkg.in/qml.v*
ETH_DEPS=$(go list -f '{{.Imports}} {{.TestImports}} {{.XTestImports}}' github.com/ethereum/go-ethereum/... | sed -e 's/\[//g' | sed -e 's/\]//g' | sed -e 's/C //g'); if [ "$ETH_DEPS" ]; then go get $ETH_DEPS; fi

Re-install mist:

go clean && go install && mist

[caktux]

If you already had 5.3.2, you can probably just brew switch qt5 5.3.2 instead.

[obscuren]

Submitted possible solution to go-qml repo. See: go-qml/qml#137

[jinserk]

using brew only, I've resolve this as follows:

As tgerring commented, first check the qt 5.3.2 from doing this:

cd $( brew --prefix ) && git checkout 4f25f52 /usr/local/Library/Formula/qt5.rb

Then, just reinstall qt5 using brew:

brew reinstall qt5

Switch qt5 to 5.3.2:

brew switch qt5 5.3.2

finally reinstall go-ethereum:

brew reinstall go-ethereum

[obscuren]

Fixed go-qml and created PR go-qml/qml#140

[cyrusadkisson]

[ REDACTED ] see https://gist.github.com/obscuren/51437f663cfaedff398f

"Issue is for qt 5.4 not 5.2.1. Please re-open new issue."

[cyrusadkisson]

Ok. Sorry. I got mist to execute just now on 5.2.1 anyway.