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Details

Type: Bug
Resolution: Done
Priority: P1: Critical
Fix Version/s: 6.2.6, 6.4.0 RC1, 6.4, 6.5.0 Beta1
Affects Version/s: 5.12.10, 5.15.3, 6.0.2, 6.1.0 FF
Component/s: QML: Declarative and Javascript Engine
Labels:
- qmlnext

Commits:
0b9fa18dfe (qt/qtdeclarative/dev) 0b9fa18dfe (qt/tqtc-qtdeclarative/dev) cd18860969 (qt/tqtc-qtdeclarative/6.2) 630383d43a (qt/qtdeclarative/6.4) 4f23f4b350 (qt/qtdeclarative/6.3) 4f23f4b350 (qt/tqtc-qtdeclarative/6.3) 4f23f4b350 (qt/qtdeclarative/6.3.2)

Description

With 5.9.9 it still works. With 5.12 it's broken. It always fails after the first iteration.

ulf@fant:~/dev/qmlbench/benchmarks/manual/v8bench$ ~/dev/build-qmlbench-Desktop_Qt_5_12_7_GCC_64bit-Profile/src/qmlbench v8-DeltaBlue.qml 
ID:          
OS:          Debian GNU/Linux 10 (buster)
QPA:         xcb
GL_VENDOR:   X.Org
GL_RENDERER: Radeon RX 570 Series (POLARIS10, DRM 3.27.0, 4.19.0-14-amd64, LLVM 7.0.1)
GL_VERSION:  4.5 (Compatibility Profile) Mesa 18.3.6
running: /home/ulf/dev/qmlbench/benchmarks/manual/v8bench/v8-DeltaBlue.qml
    244 frames
qrc:/3rdparty/v8-bench.js:73: TypeError: Type error
qrc:/V8Benchmark.qml:63: TypeError: Cannot read property 'benchmarks' of undefined
qrc:/V8Benchmark.qml:81: TypeError: Value is undefined and could not be converted to an object
qrc:/V8Benchmark.qml:81: TypeError: Value is undefined and could not be converted to an object
qrc:/V8Benchmark.qml:81: TypeError: Value is undefined and could not be converted to an object
[...]

It also crashes randomly.