JVM crashes with SIGSEGV in gdk_pointer_ungrab when ending a Drag and Drop (DnD) operation in Native Wayland

[zyppe]

Describe the bug
JVM crashes with SIGSEGV in gdk_pointer_ungrab when ending a Drag and Drop (DnD) operation in Native Wayland

To Reproduce

1. Launch Eclipse under a Native Wayland environment (without setting GDK_BACKEND=x11).
2. Open the Bookmarks view via top menu: Window -> Show View -> Bookmarks.
3. Click and drag the Bookmarks tab to dock it side-by-side with the Outline view tab (or any other view stack).
4. Release the mouse button to complete the drag-and-drop operation.
5. Eclipse freezes / terminates immediately with a JVM crash (SIGSEGV in gdk_pointer_ungrab).

Expected behavior
The tab should be dragged and docked to the desired location successfully without crashing or freezing.

Screenshots

Environment:

1. Select the platform(s) on which the behavior is seen:

• • [] All OS
• • Windows
• • Linux
• • macOS

2. Additional OS info (e.g. OS version, Linux Desktop, etc)
   openSUSE Tumbleweed-Slowroll 20260901 x86_64
   KDE

3. JRE/JDK version
   openjdk version "25.0.4.1" 2026-08-18 LTS (Corretto/Temurin)
   Version since
   Eclipse 4.41.0.I20260828-1142
   SWT 3.135.0 (org.eclipse.swt.gtk.linux.x86_64_3.135.0.v20260819-1952)

Workaround (or) Additional context
org.eclipse.swt.internal.gtk.version=3.24.53

And a log

!SESSION 2026-09-20 18:35:32.365 -----------------------------------------------
eclipse.buildId=4.41.0.I20260828-1142
java.version=25.0.4.1
java.vendor=Amazon.com Inc.
BootLoader constants: OS=linux, ARCH=x86_64, WS=gtk, NL=zh_CN
Command-line arguments: -os linux -ws gtk -arch x86_64

!ENTRY org.eclipse.ui 4 0 2026-09-20 18:44:39.729
!MESSAGE Unhandled event loop exception
!STACK 0
java.lang.NullPointerException: Cannot invoke "org.eclipse.swt.widgets.Shell.setCursor(org.eclipse.swt.graphics.Cursor)" because the return value of "org.eclipse.e4.ui.workbench.addons.dndaddon.DnDManager.getDragShell()" is null
at org.eclipse.e4.ui.workbench.addons.dndaddon.DnDManager.startDrag(DnDManager.java:241)
at org.eclipse.e4.ui.workbench.addons.dndaddon.DnDManager.lambda$0(DnDManager.java:84)
at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:169)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:91)
at org.eclipse.swt.widgets.Display.sendEvent(Display.java:5888)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1659)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:5103)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:4531)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$5.run(PartRenderingEngine.java:1160)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:339)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1051)
at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:153)
at org.eclipse.ui.internal.Workbench.lambda$3(Workbench.java:680)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:339)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:583)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:173)
at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:193)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:219)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:149)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:115)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:467)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:298)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
at java.base/java.lang.reflect.Method.invoke(Method.java:565)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:615)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:563)
at org.eclipse.equinox.launcher.Main.run(Main.java:1415)
at org.eclipse.equinox.launcher.Main.main(Main.java:1387)

[zyppe]

fatal.log
This is the log. And in terminal, it says

 9月 20, 2026 4:56:09 下午 org.apache.aries.spifly.BaseActivator log
信息: Registered provider org.slf4j.simple.SimpleServiceProvider of service org.slf4j.spi.SLF4JServiceProvider in bundle slf4j.simple
(Eclipse:106348): Gtk-WARNING **: 16:56:20.474: Negative content width -1 (allocation 1, extents 1x1) while allocating gadget (node scrolledwindow, owner GtkScrolledWindow)
#
# A fatal error has been detected by the Java Runtime Environment:
#
# SIGSEGV (0xb) at pc=0x00007fad5efc5ce8, pid=106348, tid=106349
#
# JRE version: OpenJDK Runtime Environment Corretto-25.0.4.8.1 (25.0.4.1+8) (build 25.0.4.1+8-LTS)
# Java VM: OpenJDK 64-Bit Server VM Corretto-25.0.4.8.1 (25.0.4.1+8-LTS, mixed mode, sharing, tiered, compressed oops, compressed class ptrs, g1 gc, linux-amd64)
# Problematic frame:
# C [libgobject-2.0.so.0+0x3fce8] g_type_check_instance_is_a+0x48
#
# Core dump will be written. Default location: Determined by the following: "/usr/lib/systemd/systemd-coredump %P %u %g %s %t %c %h %d %F %I" (alternatively, falling back to /home/benjamin/eclipse/core.106348)
#
# An error report file with more information is saved as:
# /home/benjamin/eclipse/hs_err_pid106348.log
[36.326s][warning][os] Loading hsdis library failed
#
# If you would like to submit a bug report, please visit:
# https://github.com/corretto/corretto-25/issues/
# The crash happened outside the Java Virtual Machine in native code.
# See problematic frame for where to report the bug.
# 

Or it says

(Eclipse:149299): Gdk-CRITICAL **: 18:44:39.726: gdk_window_get_display: assertion 'GDK_IS_WINDOW (window)' failed

(Eclipse:149299): Gdk-CRITICAL **: 18:44:39.726: gdk_display_get_default_seat: assertion 'GDK_IS_DISPLAY (display)' failed

(Eclipse:149299): Gdk-CRITICAL **: 18:44:39.726: gdk_seat_ungrab: assertion 'GDK_IS_SEAT (seat)' failed