Unreal Engine Issues and Bug Tracker (UE-46412)

Description

This is a common crash in the 4.16 release (affecting Windows and Mac). A log file is attached. Users have not provided descriptions so additional information is not currently available.

Windows Callstack (first 5 lines)

Access violation - code c0000005 (first/second chance not available)

UE4Editor_MaterialEditor!FMaterialEditor::OnCanPromoteToParameter() [materialeditor.cpp:2692]
UE4Editor_MaterialEditor!TBaseSPMethodDelegateInstance<0,FMaterialEditor,0,bool __cdecl() [delegateinstancesimpl.h:327]
UE4Editor_Slate!FUICommandList::CanExecuteAction() [uicommandlist.cpp:111]
UE4Editor_Slate!SMenuEntryBlock::IsEnabled() [smenuentryblock.cpp:1099]
UE4Editor_Slate!TBaseSPMethodDelegateInstance<1,SMenuEntryBlock,0,bool __cdecl() [delegateinstancesimpl.h:327]

Callstack from Log (Mac)

MaterialEditorStats: Info Texture samplers: 1/16
LogCrashTracker: 

LogMac: === Critical error: ===
SIGSEGV: invalid attempt to access memory at address 0x128

LogMac: FMaterialEditor::OnCanPromoteToParameter() Address = 0x240be7d2 (filename not found) [in UE4Editor-MaterialEditor.dylib]
TBaseSPMethodDelegateInstance<false, FMaterialEditor, (ESPMode)0, bool ()>::Execute() const Address = 0x24179bbb (filename not found) [in UE4Editor-MaterialEditor.dylib]
FUICommandList::CanExecuteAction(TSharedRef<FUICommandInfo const, (ESPMode)0>) const Address = 0x15d4344f (filename not found) [in UE4Editor-Slate.dylib]
SMenuEntryBlock::IsEnabled() const Address = 0x15e78fe2 (filename not found) [in UE4Editor-Slate.dylib]
TBaseSPMethodDelegateInstance<true, SMenuEntryBlock, (ESPMode)0, bool ()>::Execute() const Address = 0x15f0668b (filename not found) [in UE4Editor-Slate.dylib]
SCompoundWidget::OnPaint(FPaintArgs const&, FGeometry const&, FSlateRect const&, FSlateWindowElementList&, int, FWidgetStyle const&, bool) const Address = 0x1677b19c (filename not found) [in UE4Editor-SlateCore.dylib]
SWidget::Paint(FPaintArgs const&, FGeometry const&, FSlateRect const&, FSlateWindowElementList&, int, FWidgetStyle const&, bool) const Address = 0x166ce2da (filename not found) [in UE4Editor-SlateCore.dylib]
SOverlay::OnPaint(FPaintArgs const&, FGeometry const&, FSlateRect const&, FSlateWindowElementList&, int, FWidgetStyle const&, bool) const Address = 0x1677eeae (filename not found) [in UE4Editor-SlateCore.dylib]
SWidget::Paint(FPaintArgs const&, FGeometry const&, FSlateRect const&, FSlateWindowElementList&, int, FWidgetStyle const&, bool) const Address = 0x166ce2da (filename not found) [in UE4Editor-SlateCore.dylib]
SPanel::PaintArrangedChildren(FPaintArgs const&, FArrangedChildren const&, FSlateRect const&, FSlateWindowElementList&, int, FWidgetStyle const&, bool) const Address = 0x1677f9eb (filename not found) [in UE4Editor-SlateCore.dylib]
SPanel::OnPaint(FPaintArgs const&, FGeometry const&, FSlateRect const&, FSlateWindowElementList&, int, FWidgetStyle const&, bool) const Address = 0x1677a7b9 (filename not found) [in UE4Editor-SlateCore.dylib]
SWidget::Paint(FPaintArgs const&, FGeometry const&, FSlateRect const&, FSlateWindowElementList&, int, FWidgetStyle const&, bool) const Address = 0x166ce2da (filename not found) [in UE4Editor-SlateCore.dylib]
SPanel::PaintArrangedChildren(FPaintArgs const&, FArrangedChildren const&, FSlateRect const&, FSlateWindowElementList&, int, FWidgetStyle const&, bool) const Address = 0x1677f9eb (filename not found) [in UE4Editor-SlateCore.dylib]
SPanel::OnPaint(FPaintArgs const&, FGeometry const&, FSlateRect const&, FSlateWindowElementList&, int, FWidgetStyle const&, bool) const Address = 0x1677a7b9 (filename not found) [in UE4Editor-SlateCore.dylib]
SWidget::Paint(FPaintArgs const&, FGeometry const&, FSlateRect const&, FSlateWindowElementList&, int, FWidgetStyle const&, bool) const Address = 0x166ce2da (filename not found) [in UE4Editor-SlateCore.dylib]
SPanel::PaintArrangedChildren(FPaintArgs const&, FArrangedChildren const&, FSlateRect const&, FSlateWindowElementList&, int, FWidgetStyle const&, bool) const Address = 0x1677f9eb (filename not found) [in UE4Editor-SlateCore.dylib]
SPanel::OnPaint(FPaintArgs const&, FGeometry const&, FSlateRect const&, FSlateWindowElementList&, int, FWidgetStyle const&, bool) const Address = 0x1677a7b9 (filename not found) [in UE4Editor-SlateCore.dylib]
SWidget::Paint(FPaintArgs const&, FGeometry const&, FSlateRect const&, FSlateWindowElementList&, int, FWidgetStyle const&, bool) const Address = 0x166ce2da (filename not found) [in UE4Editor-SlateCore.dylib]
SOverlay::OnPaint(FPaintArgs const&, FGeometry const&, FSlateRect const&, FSlateWindowElementList&, int, FWidgetStyle const&, bool) const Address = 0x1677eeae (filename not found) [in UE4Editor-SlateCore.dylib]
SWidget::Paint(FPaintArgs const&, FGeometry const&, FSlateRect const&, FSlateWindowElementList&, int, FWidgetStyle const&, bool) const Address = 0x166ce2da (filename not found) [in UE4Editor-SlateCore.dylib]
...continued in log...

Steps to Reproduce

Create a new material
Right click on the BaseColor input pin repeatedly

Callstack

SEGV_MAPERR at 0x128

UE4Editor-MaterialEditor.dylib!FMaterialEditor::OnCanPromoteToParameter()
UE4Editor-MaterialEditor.dylib!TBaseSPMethodDelegateInstance<false, FMaterialEditor, (ESPMode)0, bool ()>::Execute()
UE4Editor-Slate.dylib!FUICommandList::CanExecuteAction(TSharedRef<FUICommandInfo const,()
UE4Editor-Slate.dylib!SMenuEntryBlock::IsEnabled()
UE4Editor-Slate.dylib!TBaseSPMethodDelegateInstance<true, SMenuEntryBlock, (ESPMode)0, bool ()>::Execute()
UE4Editor-SlateCore.dylib!SCompoundWidget::OnPaint()
UE4Editor-SlateCore.dylib!SWidget::Paint()
UE4Editor-SlateCore.dylib!SOverlay::OnPaint()
UE4Editor-SlateCore.dylib!SWidget::Paint()
UE4Editor-SlateCore.dylib!SPanel::PaintArrangedChildren()
UE4Editor-SlateCore.dylib!SPanel::OnPaint()
UE4Editor-SlateCore.dylib!SWidget::Paint()
UE4Editor-SlateCore.dylib!SPanel::PaintArrangedChildren()
UE4Editor-SlateCore.dylib!SPanel::OnPaint()
UE4Editor-SlateCore.dylib!SWidget::Paint()
UE4Editor-SlateCore.dylib!SPanel::PaintArrangedChildren()
UE4Editor-SlateCore.dylib!SPanel::OnPaint()
UE4Editor-SlateCore.dylib!SWidget::Paint()
UE4Editor-SlateCore.dylib!SOverlay::OnPaint()
UE4Editor-SlateCore.dylib!SWidget::Paint()
UE4Editor-SlateCore.dylib!SPanel::PaintArrangedChildren()
UE4Editor-SlateCore.dylib!SPanel::OnPaint()
UE4Editor-SlateCore.dylib!SWidget::Paint()
UE4Editor-SlateCore.dylib!SCompoundWidget::OnPaint()
UE4Editor-Slate.dylib!SScrollBox::OnPaint()
UE4Editor-SlateCore.dylib!SWidget::Paint()
UE4Editor-SlateCore.dylib!SCompoundWidget::OnPaint()
UE4Editor-Slate.dylib!SBorder::OnPaint()
UE4Editor-SlateCore.dylib!SWidget::Paint()
UE4Editor-SlateCore.dylib!SCompoundWidget::OnPaint()
UE4Editor-SlateCore.dylib!SWidget::Paint()
UE4Editor-SlateCore.dylib!FSlateWindowElementList::FDeferredPaint::ExecutePaint()
UE4Editor-SlateCore.dylib!FSlateWindowElementList::PaintDeferred()
UE4Editor-SlateCore.dylib!SWidget::Paint()
UE4Editor-Slate.dylib!FSlateApplication::DrawWindowAndChildren(TSharedRef<SWindow,()
UE4Editor-Slate.dylib!FSlateApplication::DrawWindowAndChildren(TSharedRef<SWindow,()
UE4Editor-Slate.dylib!FSlateApplication::DrawWindowAndChildren(TSharedRef<SWindow,()
UE4Editor-Slate.dylib!FSlateApplication::PrivateDrawWindows(TSharedPtr<SWindow,()
UE4Editor-Slate.dylib!FSlateApplication::DrawWindows()
UE4Editor-Slate.dylib!FSlateApplication::TickApplication()
UE4Editor-Slate.dylib!FSlateApplication::Tick()
UE4Editor!FEngineLoop::Tick()
UE4Editor!GuardedMain()
UE4Editor!<Unknown>
UE4Editor-Core.dylib!<Unknown>
Foundation!Unknown()
libsystem_pthread.dylib!<Unknown>
libsystem_pthread.dylib!<Unknown>
libsystem_pthread.dylib!<Unknown>

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Fixed

Component	UE - Rendering Architecture - Materials
Affects Versions	4.16
Target Fix	4.17

Fix Commit	3521202
Main Commit	3555226
Release Commit	3521202

Created	Jun 22, 2017
Resolved	Jul 5, 2017
Updated	Nov 2, 2021

View Jira Issue

UE-46412

[CrashReport] Crash on FMaterialEditor::OnCanPromoteToParameter()

[CrashReport] Crash on FMaterialEditor::OnCanPromoteToParameter()

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