A crash occurs when using the 'HighRes Shot 2' command, followed by the 'Shot' command. The user reporting the issue made a couple of notes to avoid the crash using these steps.
He mentions the crash does not occur when using the four viewport layout, or if the screen is really small. The repro steps include going to fullscreen, so this could be part of the issue.
1. Open any level
2. Select the Perspective Viewport
3. Click on the big 'Play' button (or ALT+P)
4. Max out the Viewport by pressing F11
5. Open the command console (opens with ` key for me)
6. Type 'HighResShot 2' (this works fine)
7. Type 'Shot' (editor now crashes)
MachineId:2A069A5E45F14F4721D649973910C60C
EpicAccountId:a390780216c14d60ae65a7d74e1c7442
Access violation - code c0000005 (first/second chance not available)
msvcr120 + 247016 bytes
UE4Editor_Core!FArchiveFileWriterGeneric::Serialize() + 359 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\private\hal\filemanagergeneric.cpp:761]
UE4Editor_Core!FFileHelper::CreateBitmap() + 1385 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\private\misc\coremisc.cpp:430]
UE4Editor_Engine!UGameViewportClient::ProcessScreenShots() + 1180 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\engine\private\gameviewportclient.cpp:1250]
UE4Editor_Engine!FViewport::Draw() + 1247 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\engine\private\unrealclient.cpp:999]
UE4Editor_UnrealEd!UEditorEngine::Tick() + 8339 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\editor\unrealed\private\editor.cpp:1515]
UE4Editor_UnrealEd!UUnrealEdEngine::Tick() + 22 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\editor\unrealed\private\unrealedengine.cpp:347]
UE4Editor!FEngineLoop::Tick() + 4179 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\launch\private\launchengineloop.cpp:2257]
UE4Editor!GuardedMain() + 1404 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\launch\private\launch.cpp:142]
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]
Head over to the existing Questions & Answers thread and let us know what's up.