On Monday, 25 September 2017 at 21:34:40 UTC, Mengu wrote:
delete fileContents;
This looks suspicious - it is a slice of the memory-mapped file, not memory on the GC-managed heap, so "delete" is inapplicable to it. The GC ought to throw an exception when attempting to delete things not on the GC heap though.
I think the stack trace itself looks like something that should only happen when the GC's internal data structures are corrupted, so you may want to investigate in that direction.
