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  1. Qt
  2. QTBUG-77210

QML Image object causes a crash when it gets deleted while it's still loading

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    • WebAssembly
    • f5a7514f42 (qt/tqtc-qtbase/6.4.1)

    Description

      I'm using the Image object in a ListView-delegate to load Images directly from Gravatar in a user table. When I scroll very fast in the list the application crashes with exit code 79. My assumption is that the network reply tries to access memory which already has been freed by delegate destruction. 

      I figured out that the crash is somwhere in QNetworkReplyWasmImplPrivate. 

      This is what I could see in the JS console. Hope it helps...

       

      Uncaught RuntimeError: memory access out of bounds
    at wasm-function[6087]:148
    at wasm-function[8223]:2028
    at wasm-function[4116]:14
    at wasm-function[24811]:1344
    at wasm-function[24816]:381
    at wasm-function[17810]:34
    at wasm-function[20444]:16
    at Module.dynCall_vii (eval at completeLoadEmscriptenModule (http://localhost/app/qtloader.js:439:14), <anonymous>:1:314397)
    at dynCall_vii_2078 (eval at makeDynCaller (eval at completeLoadEmscriptenModule (http://localhost/app/qtloader.js:439:14)), <anonymous>:4:12)
    at XMLHttpRequest.qt_QNetworkReplyWasmImplPrivate_responseHeadersCallback (eval at new_ (eval at completeLoadEmscriptenModule (http://localhost/app/qtloader.js:439:14)), <anonymous>:8:1)
2wasm-04cba40a:6088 Uncaught RuntimeError: memory access out of bounds
    at wasm-function[6087]:237
    at wasm-function[8223]:2028
    at wasm-function[4116]:14
    at wasm-function[24811]:1344
    at wasm-function[24816]:381
    at wasm-function[17810]:34
    at wasm-function[20444]:16
    at Module.dynCall_vii (eval at completeLoadEmscriptenModule (http://localhost/app/qtloader.js:439:14), <anonymous>:1:314397)
    at dynCall_vii_2078 (eval at makeDynCaller (eval at completeLoadEmscriptenModule (http://localhost/app/qtloader.js:439:14)), <anonymous>:4:12)
    at XMLHttpRequest.qt_QNetworkReplyWasmImplPrivate_responseHeadersCallback (eval at new_ (eval at completeLoadEmscriptenModule (http://localhost/app/qtloader.js:439:14)), <anonymous>:8:1)
qtloader.js:368 79
qtloader.js:378 79
VM17:1 Uncaught abort(79). Build with -s ASSERTIONS=1 for more info.
qtloader.js:368 79
qtloader.js:378 79
VM17:1 Uncaught abort(79). Build with -s ASSERTIONS=1 for more info.
qtloader.js:368 79
qtloader.js:378 79
VM17:1 Uncaught abort(79). Build with -s ASSERTIONS=1 for more info.
qtloader.js:368 79
qtloader.js:378 79
VM17:1 Uncaught abort(79). Build with -s ASSERTIONS=1 for more info.
VM17:1 Uncaught 30135136
wasm-04cba40a:4122 Uncaught RuntimeError: memory access out of bounds
    at wasm-function[4121]:161
    at wasm-function[4115]:52
    at wasm-function[24817]:2125
    at wasm-function[17810]:34
    at wasm-function[20444]:16
    at Module.dynCall_vii (eval at completeLoadEmscriptenModule (http://localhost/app/qtloader.js:439:14), <anonymous>:1:314397)
    at dynCall_vii_2078 (eval at makeDynCaller (eval at completeLoadEmscriptenModule (http://localhost/app/qtloader.js:439:14)), <anonymous>:4:12)
    at XMLHttpRequest.qt_QNetworkReplyWasmImplPrivate_loadCallback (eval at new_ (eval at completeLoadEmscriptenModule (http://localhost/app/qtloader.js:439:14)), <anonymous>:8:1)
qtloader.js:368 79
qtloader.js:378 79
VM17:1 Uncaught abort(79). Build with -s ASSERTIONS=1 for more info.
wasm-04cba40a:8216 Uncaught RuntimeError: memory access out of bounds
    at wasm-function[8215]:33
    at wasm-function[24815]:586
    at wasm-function[17810]:34
    at wasm-function[20444]:16
    at Module.dynCall_vii (eval at completeLoadEmscriptenModule (http://localhost/app/qtloader.js:439:14), <anonymous>:1:314397)
    at dynCall_vii_2078 (eval at makeDynCaller (eval at completeLoadEmscriptenModule (http://localhost/app/qtloader.js:439:14)), <anonymous>:4:12)
    at FileReader.qt_QNetworkReplyWasmImplPrivate_readBinary (eval at new_ (eval at completeLoadEmscriptenModule (http://localhost/app/qtloader.js:439:14)), <anonymous>:8:1)
2wasm-04cba40a:8216 Uncaught RuntimeError: memory access out of bounds
    at wasm-function[8215]:30
    at wasm-function[24815]:586
    at wasm-function[17810]:34
    at wasm-function[20444]:16
    at Module.dynCall_vii (eval at completeLoadEmscriptenModule (http://localhost/app/qtloader.js:439:14), <anonymous>:1:314397)
    at dynCall_vii_2078 (eval at makeDynCaller (eval at completeLoadEmscriptenModule (http://localhost/app/qtloader.js:439:14)), <anonymous>:4:12)
    at FileReader.qt_QNetworkReplyWasmImplPrivate_readBinary (eval at new_ (eval at completeLoadEmscriptenModule (http://localhost/app/qtloader.js:439:14)), <anonymous>:8:1)

       

      Does anybody has a workaround while this bug isn't fixed? Orr if somebody could give me little briefing I could try to fix it by my own.

      Attachments

        For Gerrit Dashboard: QTBUG-77210
        # Subject Branch Project Status CR V
        434049,5 wasm: fix crash when network reply is closed dev qt/qtbase Status: MERGED +2 0
        439042,2 wasm: fix crash when network reply is closed 6.4 qt/qtbase Status: MERGED +2 0

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            lpotter Lorn Potter
            friedemann Friedemann Metzger
            Veli-Pekka Heinonen Veli-Pekka Heinonen
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              Updated:
              Resolved:

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