[Issue 22785] New: joiner does not support range over immutable

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=22785

          Issue ID: 22785
           Summary: joiner does not support range over immutable
           Product: D
           Version: D2
          Hardware: x86_64
                OS: Linux
            Status: NEW
          Severity: minor
          Priority: P1
         Component: dmd
          Assignee: nobody at puremagic.com
          Reporter: default_357-line at yahoo.de

import std;

void main() {
    struct S { immutable int value; }
    assert(chain([S(5)], [S(6)]).joiner.same([S(5), S(6)]));
}

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