Bug 5776 – DMD assert. failure on topN with custom comparison/data in inner function

Running DMD 2.052 on OS X. When I try to compile the following program (two files), by executing foo.d, I get the error Assertion failed: (!vthis->csym), function toObjFile, file glue.c, line 703. If I try to compile without myLess, I get: Error: function std.algorithm.topN!("a < b",cast(SwapStrategy)0,uint[]).topN compiler error, parameter 'r', bugzilla 2962?" // foo.d: #!/usr/bin/env rdmd -inline import std.random; import bar; void main() { func(); } // bar.d: import std.algorithm; void func() { bool myLess(uint a, uint b) { return a < b; } void inner(uint[] slice) { topN!myLess(slice, 0); } }