<Swing Dev> JDK 16 Linux Swing segfault

[Ty Young]

Hi,


Just sending this to report that as of right now there is somekind of 
regression in the GTK bindings code that is causing a segfault and as a 
result Netbeans (or presumably any other IDE) will not run on JDK 16 on 
Linux. This doesn't happen with Java 11. Here is the error trace that 
Netbeans spits out after segfaulting:


Current thread (0x00007f5cdc1364e0):  JavaThread "AWT-EventQueue-0" 
[_thread_in_native, id=181601, stack(0x00007f5cd5c2e000,0x00007f5cd5e2f000)]

Stack: [0x00007f5cd5c2e000,0x00007f5cd5e2f000], sp=0x00007f5cd5e2c058,  
free space=2040k
Native frames: (J=compiled Java code, A=aot compiled Java code, 
j=interpreted, Vv=VM code, C=native code)
C  0x00007f5c80de40cc

Java frames: (J=compiled Java code, j=interpreted, Vv=VM code)
j  com.sun.java.swing.plaf.gtk.GTKStyle.nativeGetXThickness(I)I+0 
java.desktop at 16-internal
j 
com.sun.java.swing.plaf.gtk.GTKStyle.<init>(Ljava/awt/Font;Lcom/sun/java/swing/plaf/gtk/GTKEngine$WidgetType;)V+24 
java.desktop at 16-internal
j 
com.sun.java.swing.plaf.gtk.GTKStyleFactory.getStyle(Ljavax/swing/JComponent;Ljavax/swing/plaf/synth/Region;)Ljavax/swing/plaf/synth/SynthStyle;+310 
java.desktop at 16-internal
j 
com.sun.java.swing.plaf.gtk.GTKLookAndFeel.initSystemColorDefaults(Ljavax/swing/UIDefaults;)V+53 
java.desktop at 16-internal
j 
com.sun.java.swing.plaf.gtk.GTKLookAndFeel.getDefaults()Ljavax/swing/UIDefaults;+33 
java.desktop at 16-internal
j javax.swing.UIManager.setLookAndFeel(Ljavax/swing/LookAndFeel;)V+66 
java.desktop at 16-internal
j  javax.swing.UIManager.setLookAndFeel(Ljava/lang/String;)V+34 
java.desktop at 16-internal
j  org.netbeans.swing.plaf.Startup.initialize()V+106
j  org.netbeans.swing.plaf.Startup.<init>()V+25
j 
org.netbeans.swing.plaf.Startup.run(Ljava/lang/Class;ILjava/net/URL;Ljava/util/ResourceBundle;)V+44
j  org.netbeans.core.CoreBridgeImpl$1$1.run()V+23
J 3088 c1 java.awt.event.InvocationEvent.dispatch()V 
java.desktop at 16-internal (69 bytes) @ 0x00007f5d593829ac 
[0x00007f5d59382780+0x000000000000022c]
J 3071 c1 
java.awt.EventQueue.dispatchEventImpl(Ljava/awt/AWTEvent;Ljava/lang/Object;)V 
java.desktop at 16-internal (136 bytes) @ 0x00007f5d593786dc 
[0x00007f5d59376b80+0x0000000000001b5c]
J 3070 c1 java.awt.EventQueue$4.run()Ljava/lang/Void; 
java.desktop at 16-internal (60 bytes) @ 0x00007f5d593747bc 
[0x00007f5d59374680+0x000000000000013c]
J 3065 c1 java.awt.EventQueue.dispatchEvent(Ljava/awt/AWTEvent;)V 
java.desktop at 16-internal (80 bytes) @ 0x00007f5d59375424 
[0x00007f5d59374e60+0x00000000000005c4]
J 3074 c1 java.awt.EventDispatchThread.pumpOneEventForFilters(I)V 
java.desktop at 16-internal (113 bytes) @ 0x00007f5d5937c934 
[0x00007f5d5937c2a0+0x0000000000000694]
j 
java.awt.EventDispatchThread.pumpEventsForFilter(ILjava/awt/Conditional;Ljava/awt/EventFilter;)V+35 
java.desktop at 16-internal
j 
java.awt.EventDispatchThread.pumpEventsForHierarchy(ILjava/awt/Conditional;Ljava/awt/Component;)V+11 
java.desktop at 16-internal
j java.awt.EventDispatchThread.pumpEvents(ILjava/awt/Conditional;)V+4 
java.desktop at 16-internal
j java.awt.EventDispatchThread.pumpEvents(Ljava/awt/Conditional;)V+3 
java.desktop at 16-internal
j  java.awt.EventDispatchThread.run()V+9 java.desktop at 16-internal
v  ~StubRoutines::call_stub


Much appreciated if this could be fixed.