Segmentation Fault on WebView

Hi

I currently encounter the following segmentation fault when executing my native app. The app is using JavaFX 15 and the Client-Plugin 0.1.32

Thread 11 "lication Thread" received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fffda13b700 (LWP 20100)]
0x0000555556ad003a in JNIJavaCallWrappers_valistJavaCallTrampoline_9dd67e3bba6d2db198ca885f9086483598da07aa ()
(gdb) bt
#0  0x0000555556ad003a in JNIJavaCallWrappers_valistJavaCallTrampoline_9dd67e3bba6d2db198ca885f9086483598da07aa ()
#1  0x00005555588ee3d1 in JNIEnv_::CallStaticObjectMethod(_jclass*, _jmethodID*, ...) ()
#2  0x0000555558a1e658 in Java_com_sun_webkit_WebPage_twkGetDocument ()
#3  0x000055555766a771 in WebPage_twkGetDocument_dbdcdf171215ff493d40a047a5d1be32f7585d11 ()
#4  0x00007fffd9695bb8 in  ()
#5  0x00002aa9f8627a88 in  ()
#6  0x0000555558a1e5f0 in Java_com_sun_webkit_WebPage_twkGetDocument ()
#7  0x00007fffb4000b60 in  ()
#8  0x000000035e5cf828 in  ()
#9  0x00007fffb16ad000 in  ()
#10 0x000055555766a75b in WebPage_twkGetDocument_dbdcdf171215ff493d40a047a5d1be32f7585d11 ()
#11 0x00007fffda139220 in  ()
#12 0x00007fffda139fb0 in  ()
#13 0x000055555766299f in WebPage_getDocument_86d59bef0ab450215440f6d51bfd312ff45f53a8 ()
#14 0x00007fff544d2968 in  ()
#15 0x000055555eba9188 in  ()
#16 0x00007fffd9695c48 in  ()
#17 0x00002aaa7cdc3c48 in  ()
#18 0x00007fffd9695c48 in  ()
#19 0x000055555d947a80 in  ()
#20 0x000055555e5c0a18 in  ()

The reason for this is easy to find (but not how to solve this, though): On a regular JVM I use reflection to get rid of the WebViews white background via

documentProperty().addListener { _, _, _ ->
    try {
        // Use reflection to retrieve the WebEngine's private 'page' field.
        val f = WebEngine::class.java.getDeclaredField("page")
        f.isAccessible = true
        val page = f.get(engine) as WebPage
        page.setBackgroundColor(java.awt.Color(0, 0, 0, 0).rgb)
    } catch (e: Exception) {
    }
}

Why? Because I need the WebView to be transparent…

Is there a way to solve this without crashing the app? Maybe via som updated META-INF/subscrate/config/reflectionconfig.json or something similar for JNI related calls?

Thanks in advance, Daniel

[jperedadnr]

Well, that’s a total different issue… 😉

[jperedadnr]

Thanks, it worked for me for a small simple case. But you should be able to solve any similar issues in the same way.

Take care and get better soon!