[Issue 15660] break immutable with pure function and mutable reference params

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=15660

Walter Bright <bugzilla at digitalmars.com> changed:

           What    |Removed                     |Added
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            Summary|break "immutable" with pure |break immutable with pure
                   |function and mutable        |function and mutable
                   |reference params            |reference params

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