Hi,

I'm getting a regular lazarus crash when starting a new project that opens a dialog that allows you to configure the project (fpcunit, web browser..)

Today's lazarus from git. Linux 64-bit, gtk2 widgetset, linux mint running cinnamon.

Console output:
-----
Hint: (lazarus) [TBuildManager.SetBuildTarget] Old=x86_64-linux--gtk2 New=x86_64-linux--gtk2 Changed: OS/CPU=True LCL=False ----------------
Hint: (lazarus) [TMainIDE.DoOpenProjectFile] "/home/michael/projects/fresnel/demo/Basic/basic.lpi" Hint: (lazarus) [TBuildManager.SetBuildTarget] Old=x86_64-linux--gtk2 New=wasm32-wasi-browser-gtk2 Changed: OS/CPU=True LCL=False The program 'lazarus' received an X Window System error. This probably reflects a bug in the program.
The error was 'BadWindow (invalid Window parameter)'. (Details: serial 111751 error_code 3 request_code 12 minor_code 0)

   (Note to programmers: normally, X errors are reported asynchronously;
    that is, you will receive the error a while after causing it.
    To debug your program, run it with the --sync command line
    option to change this behavior. You can then get a meaningful
    backtrace from your debugger if you break on the gdk_x_error() function.)

----

Projects that do not open a project configuration dialog seem unaffected.

I recently switched to using a docked IDE, maybe this has some influence ?

Any hints, things I can try ?

Michael.

09.05.2024 17:45, Michael Van Canneyt via lazarus ?????:

Do I understand correctly that it crashes when you try to open Project->"Create Project ..." or "File"->"Create ..." dialog?

It works just fine here with FPC 3.2.2 (in Xfce, but I doubt that it matters in this case). Are you using FPC 3.3.1?

Yes.

It works just fine here with FPC 3.2.2 (in Xfce, but I doubt that it matters in this case). Are you using FPC 3.3.1?

No, I only use FPC 3.2.2 to compile Lazarus, never 3.3.1.

I am not so sure that it is not related to Xfce, I suppose it uses a different window manager than Linux Mint ? I had problems with Lazarus and Cinnamon in the past: more often than not starting a debugging session crashed Cinnamon. But that improved when I upgraded to Mint 21. Maybe it is a regression in Cinnamon, but since Lazarus is the only program on my computer that has this issue, I tend to look at Lazarus for the cause.

My main problem is that I have no clue how to debug it, maybe the --sync option as explained in the error message will tell me more.

Michael.

Well, I am now 99.99% sure it is a Lazarus issue, recently introduced:

It also happens on my work PC: a standard Ubuntu 22.04 with Gnome. I didn't have it before. Only after updating lazarus to the latest git wednesday.

Unfortunately, I don't have the exact git commits :/

However, now I have a backtrace when running with --sync:

#0 0x00007ffff79698d0 in _XError () at /lib/x86_64-linux-gnu/libX11.so.6 #1 0x00007ffff7969af7 in () at /lib/x86_64-linux-gnu/libX11.so.6 #2 0x00007ffff7969b95 in () at /lib/x86_64-linux-gnu/libX11.so.6 #3 0x00007ffff796b40d in _XReply () at /lib/x86_64-linux-gnu/libX11.so.6 #4 0x00007ffff795f172 in XReconfigureWMWindow () at /lib/x86_64-linux-gnu/libX11.so.6 #5 0x00007ffff7f517d1 in () at /lib/x86_64-linux-gnu/libgdk-x11-2.0.so.0 #6 0x000000000050bb3e in APPREMOVESTAYONTOPFLAGS (this=0x7ffff696a250, ASYSTEMTOPALSO=true) at gtk2/gtk2widgetset.inc:1286 #7 0x00000000004a7758 in REMOVESTAYONTOP (this=0x7ffff6969bf0, ASYSTEMTOPALSO=true) at include/application.inc:1369 #8 0x00000000004a4e73 in MODALSTARTED (this=0x7ffff6969bf0) at include/application.inc:375 #9 0x000000000049e9eb in SHOWMODAL (this=0x7fffef37dbf0) at include/customform.inc:3002 #10 0x00000000019fabd4 in SHOWMODALOPTIONS (this=0x7fffef9166e0, FRM=0x7fffef37dbf0) at pjsdsgnregister.pas:502 #11 0x00000000019fa8fe in SHOWOPTIONSDIALOG (this=0x7fffef9166e0) at pjsdsgnregister.pas:468 #12 0x00000000019fb0a1 in DOINITDESCRIPTOR (this=0x7fffef9166e0) at pjsdsgnregister.pas:540 #13 0x00000000008a1740 in INITDESCRIPTOR (this=0x7fffef9166e0) at projectintf.pas:1337 #14 0x00000000004d5ced in DONEWPROJECT (this=0x7ffff4805050, PROJECTDESC=0x7fffef9166e0) at main.pp:6403 #15 0x00000000004cd5f3 in MNUNEWPROJECTCLICKED (this=0x7ffff4805050, SENDER=0x7fffef86cfc0) at main.pp:4306 #16 0x0000000000b136cf in MENUITEMCLICK (this=0x7fffef86cfc0, SENDER=0x7fffef8bfae0) at menuintf.pas:562 #17 0x0000000000b17500 in MENUITEMCLICK (this=0x7fffef86cfc0, SENDER=0x7fffef8bfae0) at menuintf.pas:1720 #18 0x00000000005fc871 in CLICK (this=0x7fffef8bfae0) at include/menuitem.inc:83 #19 0x00000000005fd178 in DOCLICKED (this=0x7fffef8bfae0, MSG=0) at include/menuitem.inc:296 #20 0x00000000004397c8 in DISPATCH (this=0x7fffef8bfae0, MESSAGE=0) at ../inc/objpas.inc:684 #21 0x00000000007db769 in DELIVERMESSAGE (TARGET=0x7fffef8bfae0, AMESSAGE=0) at lclmessageglue.pas:116 #22 0x000000000067c120 in DELIVE RMESSAGE (TARGET=0x7fffef8bfae0, AMESSAGE=0) at gtk2/gtk2proc.inc:3796 #23 0x00000000008297d6 in GTK2MENUITEMACTIVATE (WIDGET=0x3425040, DATA=0x7fffef8bfae0) at gtk2/gtk2wsmenus.pp:139 #24 0x00007ffff78a9d2f in g_closure_invoke () at /lib/x86_64-linux-gnu/libgobject-2.0.so.0 #25 0x00007ffff78c5c36 in () at /lib/x86_64-linux-gnu/libgobject-2.0.so.0 #26 0x00007ffff78c7614 in g_signal_emit_valist () at /lib/x86_64-linux-gnu/libgobject-2.0.so.0 #27 0x00007ffff78c7863 in g_signal_emit () at /lib/x86_64-linux-gnu/libgobject-2.0.so.0 #28 0x00007ffff7cd041c in gtk_widget_activate () at /lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0 #29 0x00007ffff7bba335 in gtk_menu_shell_activate_item () at /lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0 #30 0x00007ffff7bbbec3 in () at /lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0 #31 0x00007ffff7ba84d7 in () at /lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0 #32 0x00007ffff78a9d2f in g_closure_invoke () at /lib/x86_64-linux-gnu/libgobject-2.0.so.0 #33 0x00007ffff78c5624 in () at /lib/x86_64-linux-gnu/libgobject-2.0.so.0 #34 0x00007ffff78c7026 in g_signal_emit_valist () at /lib/x86_64-linux-gnu/libgobject-2.0.so.0 #35 0x00007ffff78c7863 in g_signal_emit () at /lib/x86_64-linux-gnu/libgobject-2.0.so.0 #36 0x00007ffff7cd4024 in () at /lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0 #37 0x00007ffff7ba6094 in gtk_propagate_event () at /lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0 #38 0x00007ffff7ba76db in gtk_main_do_event () at /lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0 #39 0x00007ffff7f4316b in () at /lib/x86_64-linux-gnu/libgdk-x11-2.0.so.0 #40 0x00007ffff77b0d3b in g_main_context_dispatch () at /lib/x86_64-linux-gnu/libglib-2.0.so.0 #41 0x00007ffff7806258 in () at /lib/x86_64-linux-gnu/libglib-2.0.so.0 #42 0x00007ffff77ae3e3 in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0 #43 0x000000000050e860 in APPWAITMESSAGE (this=0x7ffff696a250) at gtk2/gtk2widgetset.inc:2584 #44 0x00000000004a5377 in IDLE (this=0x7ffff6969bf0, WAIT=true) at include/application.inc:487 #45 0x00000000004a750c in HANDLEMESSAGE (this=0x7ffff6969bf0) at include/application.inc:1307 #46 0x00000000004a7b2f in RUNLOOP (this=0x7ffff6969bf0) at include/application.inc:1449 #47 0x0000000000667b63 in APPRUN (this=0x7ffff696a250, ALOOP=...) at include/interfacebase.inc:54 #48 0x00000000004a7ad7 in RUN (this=0x7ffff6969bf0) at include/application.inc:1437

Checking the logs for the first files in the stack trace, I get:

--------------------------------------------------------- TIX-MVANCANNEYT: ~/FPC/Lazarus/lcl (main)> git log -n 3 interfaces/gtk2/gtk2widgetset.inc commit 92e31d445e16ac42e6abcf831a0a562c1c516d36
Author: ?eljan Rikalo
Date: Wed Jan 24 18:00:33 2024 +0100

Gtk2: Implemented AllocateHwnd and DeallocateHwnd. Patch by Alexander (Rouse_) Bagel. issue #40721

commit 1783ee35d1631c80d20cf164a10974f2eb3481ce
Author: Maxim Ganetsky
Date: Fri Dec 22 18:45:41 2023 +0300

LCL-Gtk2: fixed handling of dragging image coordinates when it is dragged to non-client widget area, patch by Alexander (Rouse_) Bagel, issue #40658

commit 86218cf48d4165762de1be2145e6c63c538dab23
Author: Maxim Ganetsky
Date: Sun Dec 3 19:03:51 2023 +0300

LCL-Gtk2: Correctly clear input flag in IME mode to avoid double char input. Issue #40630, based on patch by rasberryrabbit. ---------------------------------------------------------- TIX-MVANCANNEYT: ~/FPC/Lazarus/lcl (main)> git log -n 3 include/application.inc commit d784606f771b17c0265cc0a6ba8483499bab5f76
Author: Juha
Date: Mon Apr 22 08:03:50 2024 +0300

LCL: Fix deprecation warnings. Issue #40918, patch by Don Siders.

commit 90dbac6a6f73151d93fe02243b337c7e82cbb611
Author: Juha
Date: Tue Mar 5 16:02:03 2024 +0200

LCL: Improve TApplication.ActivateHint. Issue #40820, patch by Alexander (Rouse_) Bagel.

commit 872608c38267b14d51f886dc160517f2b1d3a0a6
Author: mattias
Date: Wed Sep 6 16:17:49 2023 +0200

lcl: fixed TApplication.CreateForm for splashform
----------------------------------------------------------- TIX-MVANCANNEYT: ~/FPC/Lazarus/lcl (main)> git log -n 3 include/customform.inc commit d784606f771b17c0265cc0a6ba8483499bab5f76
Author: Juha
Date: Mon Apr 22 08:03:50 2024 +0300

LCL: Fix deprecation warnings. Issue #40918, patch by Don Siders.

commit 34eace35876e1f56b7403e7671e080e41ea5a86e
Author: ?eljan Rikalo
Date: Sat Mar 9 11:40:02 2024 +0100

LCL: Do not throw error inside SetActiveControl if we are embedded designer. issue #40833

commit 16e2f677e2b2e0eaf14bcb4ef67f4ed83db21cfe
Author: Juha
Date: Fri Mar 8 07:21:11 2024 +0200

LCL: Fix TForm.LastActiveControl behavior. Issue #40774, patch by Bernd Jung. ------------------------------------------------------------

Anything else I could check ?

Michael.

10.05.2024 16:24, Michael Van Canneyt via lazarus ?????:

Please bisect to find commit that broke it for you.

I did that, going back half a a year (I did my last lazarus update roughly 2 months ago). It didn't change anything.

So I rebuilt 'bigide' instead of 'useride'. All worked.

I then removed the anchordockingdesign package, and after a make of useride, the bug was no longer there.

Meaning the error is in the anchordocking package.

It seems I didn't start a new project since I activated anchordocking. (which is a little over a month ago...)

Michael.

11.05.2024 08:16, Michael Van Canneyt ?????:

It is likely that AnchorDocking package just triggers some issue in Gtk2 widgetset which manifests only under some specific WM (or even with some specific Gtk2 theme, it may be good idea to test this too BTW).

Please create an issue with backtrace and exact description of environment where it can be reproduced (it works just fine in Xfce for example).

It seems I didn't start a new project since I activated anchordocking. (which is a little over a month ago...) Michael.