6344 – [CTFE] Assertion Failure in interpret.c when create an empty slice from null pointer

DMD 2.054, XP32:
import std.array;
import std.stdio;
import std.conv;
import std.traits;
enum Foo
{
 pre_x,
 pre_y,
 pre_z,
} 
mixin(wrapEnum!(Foo)("NewEnum", "pre_")); // fails
private string wrapEnum(Type)(string newName, string prefix)
{
 string result = "enum " ~ newName ~ " {";
 
 foreach (member; EnumMembers!Type)
 {
 result ~= to!string(member).replace(prefix, "") ~ ",";
 }
 return result ~ "}";
}
void main()
{
 // writeln(wrapEnum!(Foo)("NewEnum", "pre_")); // writes: enum NewEnum {x,y,z,}
}
Output:
Assertion failure: 'se->e1->op == TOKarrayliteral || se->e1->op == TOKstring' on line 4957 in file 'interpret.c'
abnormal program termination

First reduction:
--------------------------------
import std.array;
string rp(string subject) {
 auto app = appender!string();
 app.put(subject[0 .. 0]); 
 auto m = app.data;
 return m;
}
enum e = rp("pre_x");
--------------------------------

Ultimate cause: create an empty slice from a 'null' pointer.
----------------------
static assert({
 char* c = null;
 auto m = c[0..0];
 return true;
}());
----------------------

https://github.com/D-Programming-Language/dmd/commit/3309fcddfbc4e445a3e418c31a49d157c33161aa
https://github.com/D-Programming-Language/dmd/commit/2ea02077de9498746f5abb0043dc6ae1e5accefc