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[GH-ISSUE #144] Bug: crash for empty DropList #63

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opened 2026-05-05 03:36:56 -06:00 by gitea-mirror · 5 comments
gitea-mirror commented 2026-05-05 03:36:56 -06:00
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Originally created by @lindquist on GitHub (Feb 3, 2023).
Original GitHub issue: https://github.com/ultimatepp/ultimatepp/issues/144

Run the following example on Windows.

Click the droplist, then the button, then the dropbutton, then just click the droplist/dropbutton alot and it will crash.

Backtrace:

DebugBreak()
Upp::AssertFailed(file=7ff702ef5ff5 "C:\\devel\\u", line=488, cond=7ff702ef6132 "!IsChild()") at C:\devel\upp\uppsrc\Core\Util.cpp 171
Upp::Ctrl::Create(parent=151186, style=2147483648, exstyle=0, savebits=1, show=4, dropshadow=1) at C:\devel\upp\uppsrc\CtrlCore\Win32Wnd.cpp 488
Upp::Ctrl::PopUpHWND(owner=151186, savebits=1, activate=1, dropshadow=1, topmost=0) at C:\devel\upp\uppsrc\CtrlCore\Win32Wnd.cpp 1163
Upp::Ctrl::PopUp(owner=3d2331f570, savebits=1, activate=1, dropshadow=1, topmost=0) at C:\devel\upp\uppsrc\CtrlCore\Win32Wnd.cpp 1175
Upp::PopUpList::PopUp(owner=3d2331f570, x=238, top=166, bottom=190, width=1826) at C:\devel\upp\uppsrc\CtrlLib\PopUpList.cpp 284
Upp::PopUpList::PopUp(owner=3d2331f570, width=0) at C:\devel\upp\uppsrc\CtrlLib\PopUpList.cpp 305
Upp::DropList::Drop() at C:\devel\upp\uppsrc\CtrlLib\DropList.cpp 81
Upp::DropList::DropPush() at C:\devel\upp\uppsrc\CtrlLib\DropList.cpp 86
Upp::MultiButton::MultiButtons::<lambda13>::operator()() at C:\devel\upp\uppsrc\CtrlLib\MultiButton.cpp 121
Upp::Function<void ()>::Wrapper<`lambda at C:\devel\upp\uppsrc\CtrlLib\MultiButton.cpp:121:16'>::Execute() at C:\devel\upp\uppsrc\Core\Function.h 17
Upp::Function<void ()>::operator()() at C:\devel\upp\uppsrc\Core\Function.h 76
Upp::MultiButton::DoPush(i=0) at C:\devel\upp\uppsrc\CtrlLib\MultiButton.cpp 646
Upp::MultiButton::LeftDown(flags=8) at C:\devel\upp\uppsrc\CtrlLib\MultiButton.cpp 666
Upp::Ctrl::MouseEvent(event=129, p=, zdelta=0, keyflags=8) at C:\devel\upp\uppsrc\CtrlCore\CtrlMouse.cpp 160
Upp::Ctrl::MouseEvent0(event=129, p=, zdelta=0, keyflags=8) at C:\devel\upp\uppsrc\CtrlCore\CtrlMouse.cpp 96
Upp::Ctrl::MouseEventH(event=129, p=, zdelta=0, keyflags=8) at C:\devel\upp\uppsrc\CtrlCore\CtrlMouse.cpp 116
Upp::Ctrl::MEvent0(e=129, p=, zd=0) at C:\devel\upp\uppsrc\CtrlCore\CtrlMouse.cpp 348
Upp::Ctrl::DispatchMouseEvent(e=129, p=, zd=0) at C:\devel\upp\uppsrc\CtrlCore\CtrlMouse.cpp 632
Upp::Ctrl::DispatchMouseEvent(e=129, p=, zd=0) at C:\devel\upp\uppsrc\CtrlCore\CtrlMouse.cpp 632
Upp::Ctrl::DispatchMouse(e=129, p=, zd=0) at C:\devel\upp\uppsrc\CtrlCore\CtrlMouse.cpp 606
Upp::Ctrl::DoMouse(e=129, p=, zd=0) at C:\devel\upp\uppsrc\CtrlCore\Win32Wnd.cpp 562
Upp::Ctrl::WindowProc(message=513, wParam=1, lParam=852658) at C:\devel\upp\uppsrc\CtrlCore\Win32Proc.cpp 273
Upp::TopWindow::WindowProc(message=513, wParam=1, lParam=852658) at C:\devel\upp\uppsrc\CtrlCore\TopWin32.cpp 70
Upp::Ctrl::WndProc(hWnd=151186, message=513, wParam=1, lParam=852658) at C:\devel\upp\uppsrc\CtrlCore\Win32Wnd.cpp 665
CallWindowProcW()
DispatchMessageW()
Upp::Ctrl::sProcessMSG(msg=) at C:\devel\upp\uppsrc\CtrlCore\Win32Wnd.cpp 761
Upp::Ctrl::ProcessEvent(quit=3d2331f29f) at C:\devel\upp\uppsrc\CtrlCore\Win32Wnd.cpp 782
Upp::Ctrl::ProcessEvents(quit=3d2331f29f) at C:\devel\upp\uppsrc\CtrlCore\Win32Wnd.cpp 800
Upp::Ctrl::EventLoop(ctrl=3d2331f408) at C:\devel\upp\uppsrc\CtrlCore\Win32Wnd.cpp 832
Upp::TopWindow::Run(appmodal=0) at C:\devel\upp\uppsrc\CtrlCore\TopWindow.cpp 323
GuiMainFn_() at C:\devel\upp\MyApps\DropListBug\main.cpp 18
Upp::AppExecute__(app=7ff702a114f0) at C:\devel\upp\uppsrc\Core\App.cpp 479
WinMain(hInstance=7ff702a10000, lpCmdLine=22e2d2f0678 "", nCmdShow=10) at C:\devel\upp\MyApps\DropListBug\main.cpp 15
main()
WinMainCRTStartup()
WinMainCRTStartup()
BaseThreadInitThunk()
RtlUserThreadStart()

Test case:

#include <CtrlLib/CtrlLib.h>

using namespace Upp;

struct App : TopWindow {
	DropList drop;
	Button button;
	App() {
		int h = 12 * StdFont().GetLineHeight() / 10;
		Add(drop.HSizePos().TopPos(0, h));
		Add(button.HSizePos().VSizePos(h));
	}
};

GUI_APP_MAIN
{
	App app;
	app.Run();
}
Originally created by @lindquist on GitHub (Feb 3, 2023). Original GitHub issue: https://github.com/ultimatepp/ultimatepp/issues/144 Run the following example on Windows. Click the droplist, then the button, then the dropbutton, then just click the droplist/dropbutton alot and it will crash. Backtrace: ``` DebugBreak() Upp::AssertFailed(file=7ff702ef5ff5 "C:\\devel\\u", line=488, cond=7ff702ef6132 "!IsChild()") at C:\devel\upp\uppsrc\Core\Util.cpp 171 Upp::Ctrl::Create(parent=151186, style=2147483648, exstyle=0, savebits=1, show=4, dropshadow=1) at C:\devel\upp\uppsrc\CtrlCore\Win32Wnd.cpp 488 Upp::Ctrl::PopUpHWND(owner=151186, savebits=1, activate=1, dropshadow=1, topmost=0) at C:\devel\upp\uppsrc\CtrlCore\Win32Wnd.cpp 1163 Upp::Ctrl::PopUp(owner=3d2331f570, savebits=1, activate=1, dropshadow=1, topmost=0) at C:\devel\upp\uppsrc\CtrlCore\Win32Wnd.cpp 1175 Upp::PopUpList::PopUp(owner=3d2331f570, x=238, top=166, bottom=190, width=1826) at C:\devel\upp\uppsrc\CtrlLib\PopUpList.cpp 284 Upp::PopUpList::PopUp(owner=3d2331f570, width=0) at C:\devel\upp\uppsrc\CtrlLib\PopUpList.cpp 305 Upp::DropList::Drop() at C:\devel\upp\uppsrc\CtrlLib\DropList.cpp 81 Upp::DropList::DropPush() at C:\devel\upp\uppsrc\CtrlLib\DropList.cpp 86 Upp::MultiButton::MultiButtons::<lambda13>::operator()() at C:\devel\upp\uppsrc\CtrlLib\MultiButton.cpp 121 Upp::Function<void ()>::Wrapper<`lambda at C:\devel\upp\uppsrc\CtrlLib\MultiButton.cpp:121:16'>::Execute() at C:\devel\upp\uppsrc\Core\Function.h 17 Upp::Function<void ()>::operator()() at C:\devel\upp\uppsrc\Core\Function.h 76 Upp::MultiButton::DoPush(i=0) at C:\devel\upp\uppsrc\CtrlLib\MultiButton.cpp 646 Upp::MultiButton::LeftDown(flags=8) at C:\devel\upp\uppsrc\CtrlLib\MultiButton.cpp 666 Upp::Ctrl::MouseEvent(event=129, p=, zdelta=0, keyflags=8) at C:\devel\upp\uppsrc\CtrlCore\CtrlMouse.cpp 160 Upp::Ctrl::MouseEvent0(event=129, p=, zdelta=0, keyflags=8) at C:\devel\upp\uppsrc\CtrlCore\CtrlMouse.cpp 96 Upp::Ctrl::MouseEventH(event=129, p=, zdelta=0, keyflags=8) at C:\devel\upp\uppsrc\CtrlCore\CtrlMouse.cpp 116 Upp::Ctrl::MEvent0(e=129, p=, zd=0) at C:\devel\upp\uppsrc\CtrlCore\CtrlMouse.cpp 348 Upp::Ctrl::DispatchMouseEvent(e=129, p=, zd=0) at C:\devel\upp\uppsrc\CtrlCore\CtrlMouse.cpp 632 Upp::Ctrl::DispatchMouseEvent(e=129, p=, zd=0) at C:\devel\upp\uppsrc\CtrlCore\CtrlMouse.cpp 632 Upp::Ctrl::DispatchMouse(e=129, p=, zd=0) at C:\devel\upp\uppsrc\CtrlCore\CtrlMouse.cpp 606 Upp::Ctrl::DoMouse(e=129, p=, zd=0) at C:\devel\upp\uppsrc\CtrlCore\Win32Wnd.cpp 562 Upp::Ctrl::WindowProc(message=513, wParam=1, lParam=852658) at C:\devel\upp\uppsrc\CtrlCore\Win32Proc.cpp 273 Upp::TopWindow::WindowProc(message=513, wParam=1, lParam=852658) at C:\devel\upp\uppsrc\CtrlCore\TopWin32.cpp 70 Upp::Ctrl::WndProc(hWnd=151186, message=513, wParam=1, lParam=852658) at C:\devel\upp\uppsrc\CtrlCore\Win32Wnd.cpp 665 CallWindowProcW() DispatchMessageW() Upp::Ctrl::sProcessMSG(msg=) at C:\devel\upp\uppsrc\CtrlCore\Win32Wnd.cpp 761 Upp::Ctrl::ProcessEvent(quit=3d2331f29f) at C:\devel\upp\uppsrc\CtrlCore\Win32Wnd.cpp 782 Upp::Ctrl::ProcessEvents(quit=3d2331f29f) at C:\devel\upp\uppsrc\CtrlCore\Win32Wnd.cpp 800 Upp::Ctrl::EventLoop(ctrl=3d2331f408) at C:\devel\upp\uppsrc\CtrlCore\Win32Wnd.cpp 832 Upp::TopWindow::Run(appmodal=0) at C:\devel\upp\uppsrc\CtrlCore\TopWindow.cpp 323 GuiMainFn_() at C:\devel\upp\MyApps\DropListBug\main.cpp 18 Upp::AppExecute__(app=7ff702a114f0) at C:\devel\upp\uppsrc\Core\App.cpp 479 WinMain(hInstance=7ff702a10000, lpCmdLine=22e2d2f0678 "", nCmdShow=10) at C:\devel\upp\MyApps\DropListBug\main.cpp 15 main() WinMainCRTStartup() WinMainCRTStartup() BaseThreadInitThunk() RtlUserThreadStart() ``` Test case: ``` #include <CtrlLib/CtrlLib.h> using namespace Upp; struct App : TopWindow { DropList drop; Button button; App() { int h = 12 * StdFont().GetLineHeight() / 10; Add(drop.HSizePos().TopPos(0, h)); Add(button.HSizePos().VSizePos(h)); } }; GUI_APP_MAIN { App app; app.Run(); } ```
gitea-mirror commented 2026-05-05 03:37:00 -06:00
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@lindquist commented on GitHub (Feb 4, 2023):

Actually, it does not seem to have anything to do with the list being empty. Add an element, it still crashes when repeatedly clicking the droplist

<!-- gh-comment-id:1416675523 --> @lindquist commented on GitHub (Feb 4, 2023): Actually, it does not seem to have anything to do with the list being empty. Add an element, it still crashes when repeatedly clicking the droplist
gitea-mirror commented 2026-05-05 03:37:02 -06:00
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@mirek-fidler commented on GitHub (Feb 4, 2023):

No matter how I click, I am unable to reproduce.

That said, I believe that I have found a possible culprit based on the BT
you have posted. Fix pushed to master, can you please test? (If no luck, I
will be asking for some LOGs/DUMPs).

On Sat, Feb 4, 2023 at 7:19 AM Tomas Lindquist @.***>
wrote:

Actually, it does not seem to have anything to do with the list being
empty. Add an element, it still crashes when repeatedly clicking the
droplist

—
Reply to this email directly, view it on GitHub
https://github.com/ultimatepp/ultimatepp/issues/144#issuecomment-1416675523,
or unsubscribe
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You are receiving this because you are subscribed to this thread.Message
ID: @.***>

<!-- gh-comment-id:1416708450 --> @mirek-fidler commented on GitHub (Feb 4, 2023): No matter how I click, I am unable to reproduce. That said, I believe that I have found a possible culprit based on the BT you have posted. Fix pushed to master, can you please test? (If no luck, I will be asking for some LOGs/DUMPs). On Sat, Feb 4, 2023 at 7:19 AM Tomas Lindquist ***@***.***> wrote: > Actually, it does not seem to have anything to do with the list being > empty. Add an element, it still crashes when repeatedly clicking the > droplist > > — > Reply to this email directly, view it on GitHub > <https://github.com/ultimatepp/ultimatepp/issues/144#issuecomment-1416675523>, > or unsubscribe > <https://github.com/notifications/unsubscribe-auth/AARH236ISDSORNARX7FMCCDWVXYIRANCNFSM6AAAAAAUQTG2UA> > . > You are receiving this because you are subscribed to this thread.Message > ID: ***@***.***> >
gitea-mirror commented 2026-05-05 03:37:03 -06:00
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@lindquist commented on GitHub (Feb 4, 2023):

The fix works, I've gone back and forth a few times and it's 100% reproducible without it for me 👍

<!-- gh-comment-id:1416741867 --> @lindquist commented on GitHub (Feb 4, 2023): The fix works, I've gone back and forth a few times and it's 100% reproducible without it for me 👍
gitea-mirror commented 2026-05-05 03:37:04 -06:00
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@lindquist commented on GitHub (Feb 4, 2023):

Can close imo

<!-- gh-comment-id:1416742500 --> @lindquist commented on GitHub (Feb 4, 2023): Can close imo
gitea-mirror commented 2026-05-05 03:37:05 -06:00
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@mirek-fidler commented on GitHub (Feb 4, 2023):

Excellent, thank you, a good catch. Please close.

On Sat, Feb 4, 2023 at 1:42 PM Tomas Lindquist @.***>
wrote:

Can close imo

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<!-- gh-comment-id:1416743493 --> @mirek-fidler commented on GitHub (Feb 4, 2023): Excellent, thank you, a good catch. Please close. On Sat, Feb 4, 2023 at 1:42 PM Tomas Lindquist ***@***.***> wrote: > Can close imo > > — > Reply to this email directly, view it on GitHub > <https://github.com/ultimatepp/ultimatepp/issues/144#issuecomment-1416742500>, > or unsubscribe > <https://github.com/notifications/unsubscribe-auth/AARH23YY56XNUI67NUIJZB3WVZFCZANCNFSM6AAAAAAUQTG2UA> > . > You are receiving this because you commented.Message ID: > ***@***.***> >
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