new and GC.malloc fail, core.stdc.malloc works

[John Colvin via Digitalmars-d-learn]

I'm getting OutOfMemoryErrors on some machines when calling 
GC.malloc (or new) for anything large (more than about 1GB), 
where core.stdc.malloc works fine.

Anyone ever come accross this before? I suspect it's related to 
some system memory monitor/management as it's only happening to 
me on supercomputer nodes.