Unreal Engine Issues and Bug Tracker (UE-38054)

Developer Notes

This issue has been closed as 'Won't Fix' due to an extended period of time without updates. If this issue is important to you please let us know by posting on the AnswerHub or UDN, and Epic will re-open the ticket for further review.

Questions & Answers

Description

If a widget is set to be the parent of another widget and that widgets child is added to its designer tab, opening one of those widgets will cause a crash

Steps to Reproduce

Open the editor
Create two new widget blueprints
Name the widgets (widget1 and widget2)
Set widget1 to be the parent of widget2
Add a button to widget2's designer tab
Add widget2 (via the user created section) to widget1's designer tab
Save all
Restart the editor
Try to open one of the widgets
Notice that the editor crashes with a stack overflow

Expected: A warning would be given or an error thrown when adding the child to it's parent
Result: Things appear to work until the editor is restarted at which point opening one of the widgets will cause a crash

Callstack

UE4Editor_Core!FTokenDefinitions::ConsumeToken() expressionparser.cpp:284 
UE4Editor_Core!FTokenDefinitions::ConsumeTokens() expressionparser.cpp:333 
UE4Editor_Core!ExpressionParser::Lex() expressionparser.cpp:611 
UE4Editor_Core!FTextFormatData::Compile_NoLock() textformatter.cpp:603 
UE4Editor_Core!FTextFormatData::FTextFormatData() textformatter.cpp:576 
UE4Editor_Core!FTextFormat::FTextFormat() textformatter.cpp:527 
UE4Editor_CoreUObject!FLinkerLoad::VerifyImportInner() linkerload.cpp:2491 
UE4Editor_CoreUObject!FLinkerLoad::VerifyImport() linkerload.cpp:2308 
UE4Editor_CoreUObject!FLinkerLoad::GetExportLoadClass() linkerload.cpp:2904 
UE4Editor_CoreUObject!FLinkerLoad::CreateExport() linkerload.cpp:3650 
UE4Editor_CoreUObject!FLinkerLoad::CreateExportAndPreload() linkerload.cpp:2876 
UE4Editor_CoreUObject!FLinkerLoad::LoadAllObjects() linkerload.cpp:3015 
UE4Editor_CoreUObject!LoadPackageInternalInner() uobjectglobals.cpp:1218 
UE4Editor_CoreUObject!LoadPackageInternal() uobjectglobals.cpp:1386 
UE4Editor_CoreUObject!FLinkerLoad::VerifyImportInner() linkerload.cpp:2553 
UE4Editor_CoreUObject!FLinkerLoad::VerifyImport() linkerload.cpp:2308 
UE4Editor_CoreUObject!FLinkerLoad::VerifyImportInner() linkerload.cpp:2601 
UE4Editor_CoreUObject!FLinkerLoad::VerifyImport() linkerload.cpp:2308 
UE4Editor_CoreUObject!FLinkerLoad::CreateImport() linkerload.cpp:4259 
UE4Editor_CoreUObject!FLinkerLoad::IndexToObject() linkerload.cpp:4369 
UE4Editor_CoreUObject!FLinkerLoad::CreateExport() linkerload.cpp:3687 
UE4Editor_CoreUObject!FLinkerLoad::IndexToObject() linkerload.cpp:4334 
UE4Editor_CoreUObject!FLinkerLoad::CreateExport() linkerload.cpp:3821 
UE4Editor_CoreUObject!FLinkerLoad::CreateExportAndPreload() linkerload.cpp:2876 
UE4Editor_CoreUObject!FLinkerLoad::LoadAllObjects() linkerload.cpp:3015 
UE4Editor_CoreUObject!LoadPackageInternalInner() uobjectglobals.cpp:1218 
UE4Editor_CoreUObject!LoadPackageInternal() uobjectglobals.cpp:1386 
UE4Editor_CoreUObject!FLinkerLoad::VerifyImportInner() linkerload.cpp:2553 
UE4Editor_CoreUObject!FLinkerLoad::VerifyImport() linkerload.cpp:2308 
UE4Editor_CoreUObject!FLinkerLoad::VerifyImportInner() linkerload.cpp:2601 
UE4Editor_CoreUObject!FLinkerLoad::VerifyImport() linkerload.cpp:2308 
UE4Editor_CoreUObject!FLinkerLoad::GetExportLoadClass() linkerload.cpp:2904 
UE4Editor_CoreUObject!FLinkerLoad::CreateExport() linkerload.cpp:3650 
UE4Editor_CoreUObject!FLinkerLoad::CreateExportAndPreload() linkerload.cpp:2876 
UE4Editor_CoreUObject!FLinkerLoad::LoadAllObjects() linkerload.cpp:3015 
UE4Editor_CoreUObject!LoadPackageInternalInner() uobjectglobals.cpp:1218 
UE4Editor_CoreUObject!LoadPackageInternal() uobjectglobals.cpp:1386 
UE4Editor_CoreUObject!FLinkerLoad::VerifyImportInner() linkerload.cpp:2553 
UE4Editor_CoreUObject!FLinkerLoad::VerifyImport() linkerload.cpp:2308 
UE4Editor_CoreUObject!FLinkerLoad::VerifyImportInner() linkerload.cpp:2601 
UE4Editor_CoreUObject!FLinkerLoad::VerifyImport() linkerload.cpp:2308 
UE4Editor_CoreUObject!FLinkerLoad::CreateImport() linkerload.cpp:4259 
UE4Editor_CoreUObject!FLinkerLoad::IndexToObject() linkerload.cpp:4369 
UE4Editor_CoreUObject!FLinkerLoad::CreateExport() linkerload.cpp:3687 
UE4Editor_CoreUObject!FLinkerLoad::IndexToObject() linkerload.cpp:4334 
UE4Editor_CoreUObject!FLinkerLoad::CreateExport() linkerload.cpp:3821 
UE4Editor_CoreUObject!FLinkerLoad::CreateExportAndPreload() linkerload.cpp:2876 
UE4Editor_CoreUObject!FLinkerLoad::LoadAllObjects() linkerload.cpp:3015 
UE4Editor_CoreUObject!LoadPackageInternalInner() uobjectglobals.cpp:1218 
UE4Editor_CoreUObject!LoadPackageInternal() uobjectglobals.cpp:1386 
UE4Editor_CoreUObject!FLinkerLoad::VerifyImportInner() linkerload.cpp:2553 
UE4Editor_CoreUObject!FLinkerLoad::VerifyImport() linkerload.cpp:2308 
UE4Editor_CoreUObject!FLinkerLoad::VerifyImportInner() linkerload.cpp:2601 
UE4Editor_CoreUObject!FLinkerLoad::VerifyImport() linkerload.cpp:2308 
UE4Editor_CoreUObject!FLinkerLoad::GetExportLoadClass() linkerload.cpp:2904 
UE4Editor_CoreUObject!FLinkerLoad::CreateExport() linkerload.cpp:3650 
UE4Editor_CoreUObject!FLinkerLoad::CreateExportAndPreload() linkerload.cpp:2876 
UE4Editor_CoreUObject!FLinkerLoad::LoadAllObjects() linkerload.cpp:3015 
UE4Editor_CoreUObject!LoadPackageInternalInner() uobjectglobals.cpp:1218 
UE4Editor_CoreUObject!LoadPackageInternal() uobjectglobals.cpp:1386 
UE4Editor_CoreUObject!FLinkerLoad::VerifyImportInner() linkerload.cpp:2553 
UE4Editor_CoreUObject!FLinkerLoad::VerifyImport() linkerload.cpp:2308 
UE4Editor_CoreUObject!FLinkerLoad::VerifyImportInner() linkerload.cpp:2601 
UE4Editor_CoreUObject!FLinkerLoad::VerifyImport() linkerload.cpp:2308

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Won't Fix

Component	UE - Editor - UI Systems
Affects Versions	4.13.2

Created	Nov 1, 2016
Resolved	May 10, 2017
Updated	May 10, 2017

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