import std.ascii: letters, uppercase;
import std.string: maketrans;
immutable r = maketrans(uppercase, uppercase[13 .. $] ~ uppercase[0 .. 13]);
void main() {}


DMD 2.059head:

Assertion failure: '!v->isDataseg() || v->isCTFE()' on line 108 in file 'interpret.c'


With small changes it crashes in another point:


import std.string: maketrans;
void main() {
    immutable s = "foo";
    static r = maketrans(s, s[0 .. $]);
}


DMD 2.059head:

Assertion failure: 'v->ctfeAdrOnStack >= 0 && v->ctfeAdrOnStack < stackPointer()' on line 97 in file 'interpret.c'