Bugzilla – Full Text Bug Listing
| Summary: | [GTK] GP when creating TreeColumn and TreeItem in MeasureItem callback | ||
|---|---|---|---|
| Product: | [Eclipse Project] Platform | Reporter: | Grant Gayed <grant_gayed> |
| Component: | SWT | Assignee: | Eric Williams <ericwill> |
| Status: | CLOSED WONTFIX | QA Contact: | |
| Severity: | normal | ||
| Priority: | P3 | CC: | akurtakov, ericwill |
| Version: | 3.2 | Keywords: | triaged |
| Target Milestone: | 4.8 | ||
| Hardware: | PC | ||
| OS: | Linux-GTK | ||
| Whiteboard: | |||
Note that the testcase would loop forever if it did not GPed. This is still reproducible for me, assigning to Ian. Move out of 4.7 and reassign to Eric. Some initial observations: -removing the "new TreeItem(tree, SWT.NONE);" call before shell.open() does not cause a crash -it seems the crash finally happens in gtk_tree_model_get(), though many warnings are printed before that. (In reply to Eric Williams from comment #4) > Some initial observations: > > -removing the "new TreeItem(tree, SWT.NONE);" call before shell.open() does > not cause a crash > -it seems the crash finally happens in gtk_tree_model_get(), though many > warnings are printed before that. Alternatively: just commenting out the "new TreeColumn(tree, SWT.NONE).setWidth(100);" inside the handleEvent() method of the snippet prevents the crash as well. The crash seems to happen in Tree.getId(), where the iter being passed to GTK is invalid. My guess is that the columns being created in the event handler aren't being created properly and those the iter is wrong or invalid. I'll continue to investigate. (In reply to Eric Williams from comment #5) > > Alternatively: just commenting out the "new TreeColumn(tree, > SWT.NONE).setWidth(100);" inside the handleEvent() method of the snippet > prevents the crash as well. > > The crash seems to happen in Tree.getId(), where the iter being passed to > GTK is invalid. My guess is that the columns being created in the event > handler aren't being created properly and those the iter is wrong or invalid. > > I'll continue to investigate. I've investigated this bug further with no real leads. Since this has no applicable use case, I'm going to go ahead and close this bug. If someone has a practical use case for this issue we can re-open it and investigate further. |
I know this isn't the intended use of MeasureItem callbacks, but a GP is harsh; run the snippet below, and you'll get the spew at the bottom: public static void main(String[] args) { final Display display = new Display(); final Shell shell = new Shell(display); shell.setBounds(10, 10, 200, 200); final Tree tree = new Tree(shell, SWT.NONE); tree.setBounds(10,10,150,150); tree.addListener(SWT.MeasureItem, new Listener() { public void handleEvent(Event event) { new TreeColumn(tree, SWT.NONE).setWidth(100); new TreeItem(tree, SWT.NONE); } }); new TreeItem(tree, SWT.NONE); shell.open(); while (!shell.isDisposed()) { if (!display.readAndDispatch()) display.sleep(); } display.dispose(); } (SWT:10140): Gtk-CRITICAL **: file gtktreestore.c: line 639 (gtk_tree_store_get_value): assertion `iter->stamp == GTK_TREE_STORE (tree_model)->stamp' failed (SWT:10140): GLib-GObject-CRITICAL **: file gobject.c: line 1239 (g_object_set_property): assertion `G_IS_VALUE (value)' failed (SWT:10140): GLib-GObject-CRITICAL **: file gvalue.c: line 149 (g_value_unset): assertion `G_IS_VALUE (value)' failed (SWT:10140): Gtk-CRITICAL **: file gtktreestore.c: line 639 (gtk_tree_store_get_value): assertion `iter->stamp == GTK_TREE_STORE (tree_model)->stamp' failed (SWT:10140): GLib-GObject-WARNING **: gtype.c:3350: type id `0' is invalid (SWT:10140): GLib-GObject-WARNING **: can't peek value table for type `<invalid>' which is not currently referenced # # An unexpected error has been detected by HotSpot Virtual Machine: # # SIGSEGV (0xb) at pc=0x002c409b, pid=10140, tid=3086882496 # # Java VM: Java HotSpot(TM) Client VM (1.5.0_01-b08 mixed mode) # Problematic frame: # C [libgtk-x11-2.0.so.0+0x1c309b] gtk_tree_model_get_valist+0xbe # # An error report file with more information is saved as hs_err_pid10140.log # # If you would like to submit a bug report, please visit: # http://java.sun.com/webapps/bugreport/crash.jsp #