[Issue 19499] __c_long_double brake template specialization

[d-bugmail--- via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=19499

--- Comment #5 from Walter Bright <bugzi...@digitalmars.com> ---
This was caused by:

https://github.com/dlang/dmd/pull/8632

Specifically, the lines in mtype.d:

    if (tob)
        return implicitConvTo(tob);

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