Bug 13030 – DMD assertion fails at mtype.c:697 if delegate has an argument name

The following code: void va(Args...)(const Args args) {} void func(int delegate(int n) a) { va(a); } causes an assertion in dmd: dmd: mtype.c:697: void Type::fixTo(Type*): Assertion `mod != t->mod' failed. If the name of the delegate argument is removed [no 'n'] it compiles. If the called function has just a single template [void mva(T)(const T args)] it compiles. If the called functions receives non const args [void mva(A...)(A args)] it also compiles. This is the minimal set of lines that I was able to get to in order to recreate the assertion error. DMD64 D Compiler v2.065, fails on Linux and Mac OSX.(Did not try on other platforms)

It's a regression issue from 2.064. https://github.com/D-Programming-Language/dmd/pull/3777

Commits pushed to master at https://github.com/D-Programming-Language/dmd https://github.com/D-Programming-Language/dmd/commit/bb00087381377d7a24c3cf10e0afe0cdb7440eb1 fix Issue 13030 - DMD assertion fails at mtype.c:697 if delegate has an argument name https://github.com/D-Programming-Language/dmd/commit/e7be232da36d63560f75644da1bbb5532c359635 Merge pull request #3777 from 9rnsr/fix13030 [REG2.064] Issue 13030 - DMD assertion fails at mtype.c:697 if delegate has an argument name

Commit pushed to 2.066 at https://github.com/D-Programming-Language/dmd https://github.com/D-Programming-Language/dmd/commit/0e0ac55a6e3b9fef99ecf242733fb20b34f10973 Merge pull request #3777 from 9rnsr/fix13030 [REG2.064] Issue 13030 - DMD assertion fails at mtype.c:697 if delegate has an argument name

Commit pushed to master at https://github.com/D-Programming-Language/dmd https://github.com/D-Programming-Language/dmd/commit/0e0ac55a6e3b9fef99ecf242733fb20b34f10973 Merge pull request #3777 from 9rnsr/fix13030