Enabling UBSan shows the following error:
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior filamat/src/eiff/Flattener.h:102:17 in
filamat/src/eiff/Flattener.h:102:17: runtime error: applying non-zero offset 8 to null pointer
We reference a placeholder byte on the heap when in DryRunner mode
to workaround this issue.