3196 – Segfault(mtype.c) after almost any error involving a delegate literal

Try this on both linux and windows with dmd 2.031 give me a segment fault because of a null pointer reference.
struct Foo {
}
void foo (Foo b, void delegate ()) {
}
void main () {
	foo(Foo(1), (){});
}

Bug #3227 and bug #3228 are probably duplicates of this one.

Original title:
"Bad struct declaration before a anonymous delegate within the parameter list show a segment fault" It's actually a lot more general than that. And it's a regression.
Another example from bug #3227:
auto x = (void){};
----
ice.d(1): Error: cannot have parameter of type void
ice.d(1): Error: cannot have parameter of type void
<segfault>
Other examples from bug #3228:
void main(){ (){}; (){}; }
ice.d(1): Error: function has no effect in expression (__dgliteral1)
<segfault>
This smiley variant should compile without errors. But it just segfaults.
---
static assert(!is(typeof((){(){}
 ;-()
{};})));

*** Issue 3227 has been marked as a duplicate of this issue. ***

*** Issue 3228 has been marked as a duplicate of this issue. ***

Fixed dmd 1.047 and 2.032