Editor Crashes When opening "Components" tab in blueprint 4.6

Development Programming & Scripting
1

Bug report:

Branch: Binary from launcher

Build version: 4.6.1-2386410

Detailed description of the issue: When opening a blueprint and choosing component, the editor crashes. Defaults and graph open fine and can be edited. This is only happening in our current project with only one blueprint. This began when we upgraded UE from 4.5 to 4.6.1
Repro Steps:

  1. Open specific blueprint
  2. Click on Components
  3. Editor Crashes
    This happens every time, with the specific blueprint.

Crash reporter:
MachineId:B28E6FF24BBD65F2D3E0289773FF3F51
EpicAccountId:787eece0bfe849e7969bbc8451975ea7

No minidump found for this crash.

VIsual studio ouput last lines:
First-chance exception at 0x000007FED2DB30E6 (UE4Editor-Engine.dll) in UE4Editor.exe: 0xC0000005: Access violation reading location 0x0000000000000350.
Unhandled exception at 0x000007FED2DB30E6 (UE4Editor-Engine.dll) in UE4Editor.exe: 0xC0000005: Access violation reading location 0x0000000000000350.

Attachments:

Logs:

Editor.log

Editor2.log
I will be happy to send related assets privately.

Thank you!

2

Hi Fervensmiber,

Would you be willing to post the .uasset that is causing the error? If you like, you can send a link to download it by private message directly to me over the Forums.

3

I sent you the link for the asset through forums.

Thanks for looking into this.

4

Hi Fervensmiber,

I’m unable to compile a project with the given files because they are dependent on other code files.

Unfortunately, I believe the issue is within your code files and we aren’t available to debug custom code. If you can reproduce this bug in a new project that isn’t dependent on custom code then we can help track down the issue.

Cheers,

TJ

5

I’m now getting following errors when loading the project regarding the blueprint in question:
Error Failed import for ArrowComponent /Game/Blueprints/MinionBlueprint.Default__MinionBlueprint_C:Arrow
Error Failed import for CharacterMovementComponent /Game/Blueprints/MinionBlueprint.Default__MinionBlueprint_C:CharMoveComp
Error Failed import for SkeletalMeshComponent /Game/Blueprints/MinionBlueprint.Default__MinionBlueprint_C:CharacterMesh0

Any idea if these are related or how to solve these?

I’m working to get a cutdown version of the project for you to look at.

6

I took an older version of our project which you guys (Thanks @TimLincoln) have looked at before. In the 4.2.1 version the components tab opens fine but if I upgrade the project to 4.6.1 opening the components tab crashes the editor.
I sent you the link to the project through forums.

Thanks!

7

Okay, I was able so reproduce the issue with the project you sent me. From looking at the logs it seems a few other users have had a similar crash. I submitted it as JIRA UE-10330 in our tracking software and our developers will be investigating it further. We will post back here when there is an update.

Thanks again for creating the stripped down test project for us.

Cheers,

TJ

8

A little update to this issue. Since we updated to 4.7 the blueprint crashes every time, since the components are always visible. I’m not sure if this helps you in anyway but here is the call stack

9

Hi Fervensmiber,

Even though it is still in the Preview stage, could you try converting a ‘copy’ of your project to 4.8 Preview 2? The stripped down version I have can’t be converted properly.

10

Hi TJ!

Since the blueprint was so crucial to our game, we remade the whole thing and haven’t touched the old one since. Now that you brought this up again, I tried the old blueprint in 4.7.5 and it opened just fine. It seems that some of 4.7.x patches fixed the issue.

Thanks for looking into this!