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);
    }
}