Started crashing on lighting build and save after force quit

Wasn’t sure where to ask about this, but I’ll try here.

I was building the lighting for my project when it froze, turns out my harddrive had ran out of space and I had no choice but to kill the editor. After freeing up about 70GB I started up the project again, but now every time I try to build the lighting or save the project it crashes, immediately. This seems to be the relevant console output:


Assertion failed: PackageFileTag.CompressedSize == PACKAGE_FILE_TAG_SWAPPED [File:/home/galundrux/Unreal_4.12/UnrealEngine/Engine/Source/Runtime/Core/Private/Serialization/Archive.cpp] [Line: 376] 

[2016.06.16-19.01.45:340][808]LogLinux:Error: appError called: Assertion failed: Assertion failed: PackageFileTag.CompressedSize == PACKAGE_FILE_TAG_SWAPPED [File:/home/galundrux/Unreal_4.12/UnrealEngine/Engine/Source/Runtime/Core/Private/Serialization/Archive.cpp] [Line: 376]                                                                                                                                   


Signal 11 caught.                                                                                                                       
Malloc Size=131076 LargeMemoryPoolOffset=131092                                                                                         
CommonLinuxCrashHandler: Signal=11
Malloc Size=65535 LargeMemoryPoolOffset=196655

[2016.06.16-19.01.45:374][808]LogCrashTracker: 


[2016.06.16-19.01.45:375][808]LogLinux: === Critical error: ===
Unhandled Exception: SIGSEGV: invalid attempt to access memory at address 0x00000003

[2016.06.16-19.01.45:375][808]LogLinux: Assertion failed: Assertion failed: PackageFileTag.CompressedSize == PACKAGE_FILE_TAG_SWAPPED [File:/home/galundrux/Unreal_4.12/UnrealEngine/Engine/Source/Runtime/Core/Private/Serialization/Archive.cpp] [Line: 376]

I use Unreal 4.12 on . I’m not sure where to start trying to fix this, I had a error about memory before when I switched from 4.4 to 4.12, but that went away after I edited an ini file to tell it to use 100% of the video memory, not sure if this is a similar issue or not, either way, 3 GB is all the video memory I have at the moment. I’m pretty new to working with Unreal 4. Any help would be appreciated.