Editor Crashes on launch

Development Platform & Builds
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1

The editor always crashes at 71% loading.

Attached crash log that was generated. Help would be much appreciated.

MachineId:6F273FCA447B3AEE202801A15C2EC16C
EpicAccountId:8cf51e9e83a94fffa3f45159f8666473

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

UE4Editor_Engine!TMapBase >::GetKeys() + 175 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\public\containers\map.h:254]
UE4Editor_Engine!UDataTable::GetRowNames() + 75 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\engine\private\datatable.cpp:697]
UE4Editor_RoadblockUE4!AMapBuilder::AMapBuilder() + 241 bytes [c:\users\nilu\documents\roadblock\roadblockue4\source\roadblockue4\private\mapbuilder\mapbuilder.cpp:18]
UE4Editor_CoreUObject!UClass::CreateDefaultObject() + 435 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\class.cpp:2535]
UE4Editor_CoreUObject!UObjectLoadAllCompiledInDefaultProperties() + 805 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\uobjectbase.cpp:739]
UE4Editor_CoreUObject!ProcessNewlyLoadedUObjects() + 146 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\uobjectbase.cpp:815]
UE4Editor_CoreUObject!TBaseStaticDelegateInstance::ExecuteIfSafe() + 7 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\public\delegates\delegateinstancesimpl_variadics.inl:921]
UE4Editor_Core!TBaseMulticastDelegate::Broadcast() + 149 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\public\delegates\delegatesignatureimpl_variadics.inl:1030]
UE4Editor_Core!FModuleManager::LoadModuleWithFailureReason() + 2194 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\private\modules\modulemanager.cpp:359]
UE4Editor_Projects!FModuleDescriptor::LoadModulesForPhase() + 784 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\projects\private\moduledescriptor.cpp:350]
UE4Editor_Projects!FProjectManager::LoadModulesForProject() + 581 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\projects\private\projectmanager.cpp:53]
UE4Editor!FEngineLoop::LoadStartupModules() + 705 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\launch\private\launchengineloop.cpp:1863]
UE4Editor!FEngineLoop::PreInit() + 11141 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\launch\private\launchengineloop.cpp:1400]
UE4Editor!GuardedMain() + 251 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\launch\private\launch.cpp:110]
UE4Editor!GuardedMainWrapper() + 26 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\launch\private\windows\launchwindows.cpp:126]
UE4Editor!WinMain() + 249 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\launch\private\windows\launchwindows.cpp:202]
UE4Editor!__tmainCRTStartup() + 329 bytes [f:\dd\vctools\crt\crtw32\dllstuff\crtexe.c:618]

2

Ah, nevermind. After trying to delete intermediate, saved, some content (pretty sure the cause was a datafile that I was modifying) and the binaries and regenerating all of those failed, started reading the crash log more carefully. Found a mention of MapBuilder class of mine with a line number referencing a place in code where I was using the said datafile. Commented those few lines and rebuilt the project and it launched. About to try resetting those values or something like that and see how it goes.