Bug 17739 – Calling convention of not deduced for delegate function arguments with explicit parameter types

DMD v2.075.0: alias F=extern(C) int delegate(int); void foo(F dg){ } void main(){ F dg=(int a)=>a; // ok foo((int a)=>a); // error } the error message is: bug.d(5): Error: function bug.foo (extern (C) int delegate(int) dg) is not callable using argument types (int function(int a) pure nothrow @nogc @safe) The code compiles if the explicit parameter type is removed from the delegate. The code should compile.

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