To reproduce:
1) Open the attached project and scene
2) Build and run it

CRASH!

Reproduced in Win 10 and Linux

Reproduced in 2019.3.0b1, 2019.3.0b2, 2020.1.0a1, 2020.1.0a2
Not reproduced in 2019.3.0a12, 2019.2.3f1

The file '/home/lukasd/Downloads/case_1180341-Test3D/56_Data/level0' is corrupted! Remove it and launch unity again!
[Position out of bounds!]
(Filename: Line: 214)

Caught fatal signal - signo:5 code:-6 errno:0 addr:0x3e800003990
Obtained 16 stack frames.
#0 0x007f75af124c16 in DebugStringToFile(DebugStringToFileData const&)
#1 0x007f75aeab5b6c in CachedReader::OutOfBoundsError(unsigned long, unsigned long)
#2 0x007f75aeab5e1f in CachedReader::UpdateReadCache(void*, unsigned long)
#3 0x007f75aebdb349 in void Transfer_Blittable<StreamedBinaryRead, false, unsigned char>(SerializationCommandArguments const&, RuntimeSerializationCommandInfo&)
#4 0x007f75aebd9294 in void TransferScriptingObject<StreamedBinaryRead, false>(StreamedBinaryRead&, ScriptingObjectPtr, ScriptingClassPtr, SerializationCache::Data*&, ManagedReferencesRegistry*)