Summary: DMD assert. failure on topN with custom
                    comparison/data in inner function
           Product: D
           Version: D2
          Platform: Other
        OS/Version: Mac OS X
            Status: NEW
          Severity: normal
          Priority: P2
         Component: DMD

--- Comment #0 from Magnus Lie Hetland <> 2011-03-23 15:29:33 
PDT ---
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() {

// bar.d:
import std.algorithm;
void func() {
    bool myLess(uint a, uint b) {
        return a < b;
    void inner(uint[] slice) {
        topN!myLess(slice, 0);

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