[lucy-dev] TestSortWriterMisc crash (Lucy Go bindings)

[Nick Wellnhofer <we...@aevum.de>]

Lucifers,

When trying to test the Lucy Go bindings under Linux, I encountered a crash 
when running `TestSortWriterMisc`. There's a heap corruption error triggered 
at ../core/Lucy/Index/SortFieldWriter.c:610 (FREEMEM(ords);)

 
https://github.com/apache/lucy/blob/master/core/Lucy/Index/SortFieldWriter.c#L610

I found out that the `ords` array overflows because `doc_max` is zero, but doc 
ids up to 6 are encountered (probably from the `doc_map` passed in the test 
suite). I suspect it's simply a problem with the Go test suite but I don't 
know enough about the Lucy internals to tell.

The rest of the tests passes.

Nick