[Issue 21807] Non-immutable data can be converted to immutable using function call in ctor

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=21807

moonlightsentinel at disroot.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |moonlightsentinel at disroot.o
                   |                            |rg
           Severity|critical                    |regression

--- Comment #3 from moonlightsentinel at disroot.org ---
Up to      2.062  : Failure with output: onlineapp.d(6): Error: cannot
implicitly convert expression (bb()) of type char[12LU] to string
Since      2.063  : Success and no output

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