[Issue 14430] Null parameter is detected as non-null.

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=14430

ag0aep6g at gmail.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |wrong-code
                 CC|                            |ag0aep6g at gmail.com
           Severity|major                       |regression

--- Comment #2 from ag0aep6g at gmail.com ---
Reduced:

----
void setCookie(long x = 1L << 32L, string y = null){
    assert(b.ptr is null);
}
void main(){
    setCookie();
}
----

Fails when x's default value has all zero lower 32 bits, but not all zero
higher 32 bits. y.ptr then has the value of x.

Works correctly with v2.059. Fails since v2.060.

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