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Purge Unused crashes if mouse not moved away from popup before confirm delete with enter key #125006

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opened 2024-07-18 19:23:01 +02:00 by Andrea-Lanaro · 6 comments
Andrea-Lanaro commented 2024-07-18 19:23:01 +02:00
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System Information
Operating system: Windows-10-10.0.17763-SP0 x64
Graphics card: NVIDIA GeForce RTX 3060/PCIe/SSE2 | 4.6.0 NVIDIA 556.12

Blender Version
Broken: 4.2.0 main 2024-06-01 dbc842b21e7d
Broken: 4.2.0, release 2024-07-16 a51f293548ad
Broken: 4.3.0 main 2024-07-17 0b70a9edc56b
Worked: unknown

Change came with 0fd8f29e88

Short description of error
Purge Unused crashes if mouse not moved away from popup before confirm delete with enter key

# Blender 4.2.0, Commit date: 2024-07-16 06:20, Hash a51f293548ad
bpy.data.window_managers["WinMan"]. = False  # Property
No orphaned data-blocks to purge  # Info

# backtrace
Exception Record:

ExceptionCode         : EXCEPTION_ACCESS_VIOLATION
Exception Address     : 0x00007FF76D73AFF6
Exception Module      : blender.exe
Exception Flags       : 0x00000000
Exception Parameters  : 0x2
	Parameters[0] : 0x0000000000000000
	Parameters[1] : 0x0000000000000010

Not fluent in Python but isn't there supposed to be something after dot at bpy.data.window_managers["WinMan"]. ?

Exact steps for others to reproduce the error
Default startup

  1. Access Purge Unused menu with mouse
  2. Keep mouse inside popup
  3. Confirm delete with Enter
    Using D key does not cause a crash.
**System Information** Operating system: Windows-10-10.0.17763-SP0 x64 Graphics card: NVIDIA GeForce RTX 3060/PCIe/SSE2 | 4.6.0 NVIDIA 556.12 **Blender Version** Broken: 4.2.0 `main` 2024-06-01 `dbc842b21e7d` Broken: 4.2.0, `release` 2024-07-16 `a51f293548ad` Broken: 4.3.0 `main` 2024-07-17 `0b70a9edc56b` Worked: unknown Change came with 0fd8f29e883de93dc38282f96a8c3dc04c222866 **Short description of error** Purge Unused crashes if mouse not moved away from popup before confirm delete with enter key ``` # Blender 4.2.0, Commit date: 2024-07-16 06:20, Hash a51f293548ad bpy.data.window_managers["WinMan"]. = False # Property No orphaned data-blocks to purge # Info # backtrace Exception Record: ExceptionCode : EXCEPTION_ACCESS_VIOLATION Exception Address : 0x00007FF76D73AFF6 Exception Module : blender.exe Exception Flags : 0x00000000 Exception Parameters : 0x2 Parameters[0] : 0x0000000000000000 Parameters[1] : 0x0000000000000010 ``` Not fluent in Python but isn't there supposed to be something after dot at `bpy.data.window_managers["WinMan"].` ? **Exact steps for others to reproduce the error** Default startup 1. Access **Purge Unused** menu with mouse 2. Keep mouse inside popup 3. Confirm delete with `Enter` Using `D` key does not cause a crash.
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Iliya Katushenock added the
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 label 2024-07-18 20:19:32 +02:00
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YimingWu commented 2024-07-19 05:53:27 +02:00
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Crashed in ui_apply_but_funcs_after. Looks like after.popup_op is invalid when pressing enter. Seems that it should be assigned an operator, but if there's no extra event, the previously assigned operator is deleted after initial invoking (I think) and the address is still referencing the old operator instance.

Crashed in `ui_apply_but_funcs_after`. Looks like `after.popup_op` is invalid when pressing enter. Seems that it should be assigned an operator, but if there's no extra event, the previously assigned operator is deleted after initial invoking (I think) and the address is still referencing the old operator instance.
Andrea-Lanaro changed title from Purge Unused crashes if mouse not moved before confirm delete with enter key to Purge Unused crashes if mouse not moved away from popup before confirm delete with enter key 2024-07-19 07:47:01 +02:00
Philipp Oeser commented 2024-07-19 09:27:21 +02:00
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Prefer if crashes are always set to High priority

Prefer if crashes are always set to High priority
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Philipp Oeser commented 2024-07-19 13:39:17 +02:00
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Change came with 0fd8f29e88

CC @mont29 (even though I assume this is more for #UserInterface to fix)

Seems to be a problem with the rare combination of WM_operator_props_dialog_popup with an operator that has a check callback ?

Change came with 0fd8f29e883de93dc38282f96a8c3dc04c222866 CC @mont29 (even though I assume this is more for #UserInterface to fix) Seems to be a problem with the rare combination of `WM_operator_props_dialog_popup` with an operator that has a `check` callback ?
Philipp Oeser commented 2024-07-19 15:14:18 +02:00
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Some further inspection: we are actually handling two buttons here : the operator button as well as the toggle button for one of the options (if the mouse happens to be over that button as well)

Some further inspection: we are actually handling two buttons here : the operator button as well as the toggle button for one of the options (if the mouse happens to be over that button as well)
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Philipp Oeser commented 2024-07-19 16:24:02 +02:00
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In order to not handle other buttons (in case we are executing the UI_BUT_ACTIVE_DEFAULT one via ENTER), we could simply do the following

diff --git a/source/blender/editors/interface/interface_handlers.cc b/source/blender/editors/interface/interface_handlers.cc
index 2ae97c181cf..3e78798c647 100644
--- a/source/blender/editors/interface/interface_handlers.cc
+++ b/source/blender/editors/interface/interface_handlers.cc
@@ -11105,6 +11105,7 @@ static int ui_handle_menu_event(bContext *C,
         if ((but_default != nullptr) && (but_default->active == nullptr)) {
           if (but_default->type == UI_BTYPE_BUT) {
             UI_but_execute(C, region, but_default);
+            retval = WM_UI_HANDLER_BREAK;
           }
           else {
             ui_handle_button_activate_by_type(C, region, but_default);

That would prevent us going into the operator check callback with an operator that has been (at least partially) been freed

In order to not handle other buttons (in case we are executing the `UI_BUT_ACTIVE_DEFAULT` one via ENTER), we could simply do the following ```C diff --git a/source/blender/editors/interface/interface_handlers.cc b/source/blender/editors/interface/interface_handlers.cc index 2ae97c181cf..3e78798c647 100644 --- a/source/blender/editors/interface/interface_handlers.cc +++ b/source/blender/editors/interface/interface_handlers.cc @@ -11105,6 +11105,7 @@ static int ui_handle_menu_event(bContext *C, if ((but_default != nullptr) && (but_default->active == nullptr)) { if (but_default->type == UI_BTYPE_BUT) { UI_but_execute(C, region, but_default); + retval = WM_UI_HANDLER_BREAK; } else { ui_handle_button_activate_by_type(C, region, but_default); ``` That would prevent us going into the operator `check` callback with an operator that has been (at least partially) been freed
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Philipp Oeser commented 2024-07-19 16:52:05 +02:00
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Possible fix is up, see !125085

Possible fix is up, see !125085
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Philipp Oeser self-assigned this 2024-07-22 09:04:49 +02:00
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Reference: blender/blender#125006
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