Unreal Engine Issues and Bug Tracker (UE-27594)

Description

Attempting to play an anim montage for a character without having the Anim Blueprint Generated Class set will cause the editor to crash.

Crash Reporter Link:
[Link Removed]

Steps to Reproduce

Open UE4 Editor (Third Person Template)
Add code to project based on Character (MyCharacter)

Add the following to MyCharacter.h

UPROPERTY(EditAnywhere, BlueprintReadOnly, Category = "AI|Dying")
		UAnimMontage* TestMontage;

Add the following to MyCharacter.cpp in the BeginPlay() function

	if (TestMontage) 
	{
			GetMesh()->GetAnimInstance()->Montage_Play(TestMontage); 
	}

Compile changes
In the editor, create a new AnimMontage (NewAnimMont - UE4_Mannequin_Skeleton), new AnimBlueprint (NewAnimBP - UE4_Mannequin_Skeleton), and new character blueprint based on MyCharacter (MyCharBP)
Open NewAnimMont and drag ThirdPersonJump from the asset browser to the NewAnim montage field
Open MyCharBP and set Test Montage field to NewAnimMont
Drag instance of MyCharBP into scene
#PIE

Result:
Editor crashes on play when Montage_Play is called from code

Expected:
Editor throws an error since Anim Blueprint is not yet set

Repro Rate:
3/3

Callstack

MachineId:9FA88CA44B7C623122B0039D6C8BA1B0
EpicAccountId:67b2dfbf573f4ca89257ae6f4e56a46c

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

""

UE4Editor_Engine!UAnimInstance::Montage_Play() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\engine\private\animation\animinstance.cpp:1979]
UE4Editor_MyProject7!AMyCharacter::BeginPlay() [f:\unreal projects\myproject7\source\myproject7\mycharacter.cpp:24]
UE4Editor_Engine!AWorldSettings::NotifyBeginPlay() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\engine\private\worldsettings.cpp:137]
UE4Editor_Engine!AGameMode::HandleMatchHasStarted() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\engine\private\gamemode.cpp:614]
UE4Editor_Engine!AGameMode::SetMatchState() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\engine\private\gamemode.cpp:730]
UE4Editor_Engine!AGameMode::StartMatch() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\engine\private\gamemode.cpp:591]
UE4Editor_Engine!UWorld::BeginPlay() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\engine\private\world.cpp:3082]
UE4Editor_Engine!UGameInstance::StartPIEGameInstance() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\engine\private\gameinstance.cpp:274]
UE4Editor_UnrealEd!UEditorEngine::CreatePIEGameInstance() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\editor\unrealed\private\playlevel.cpp:3012]
UE4Editor_UnrealEd!UEditorEngine::PlayInEditor() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\editor\unrealed\private\playlevel.cpp:2259]
UE4Editor_UnrealEd!UEditorEngine::StartQueuedPlayMapRequest() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\editor\unrealed\private\playlevel.cpp:1048]
UE4Editor_UnrealEd!UEditorEngine::Tick() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\editor\unrealed\private\editorengine.cpp:1244]
UE4Editor_UnrealEd!UUnrealEdEngine::Tick() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\editor\unrealed\private\unrealedengine.cpp:361]
UE4Editor!FEngineLoop::Tick() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\launch\private\launchengineloop.cpp:2427]
UE4Editor!GuardedMain() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\launch\private\launch.cpp:142]
UE4Editor!GuardedMainWrapper() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\launch\private\windows\launchwindows.cpp:126]
UE4Editor!WinMain() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\launch\private\windows\launchwindows.cpp:200]
UE4Editor!__scrt_common_main_seh() [f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl:264]
kernel32
ntdll

Community References

[BUG] Crash when playing montage without AnimBlueprint (4.10.2)

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By Design

Component	OLD - Anim
Affects Versions	4.10.4
Target Fix	4.12

Created	Feb 29, 2016
Resolved	Apr 5, 2016
Updated	May 18, 2020

UE-27594

Attempting to play an animation without an anim blueprint set causes editor to crash

Attempting to play an animation without an anim blueprint set causes editor to crash

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