[Issue 12390] New: "has no effect in expression" diagnostic regression

[d-bugmail at puremagic.com]

https://d.puremagic.com/issues/show_bug.cgi?id=12390

           Summary: "has no effect in expression" diagnostic regression
           Product: D
           Version: D2
          Platform: All
        OS/Version: All
            Status: NEW
          Keywords: rejects-valid
          Severity: regression
          Priority: P2
         Component: DMD
        AssignedTo: nobody at puremagic.com
        ReportedBy: thecybershadow at gmail.com


--- Comment #0 from Vladimir Panteleev <thecybershadow at gmail.com> 2014-03-17 13:25:39 EET ---
///////// test.d ////////
struct S { int i; }

S fun() { return S(42); }

void main()
{
    fun().i == 4;
}
/////////////////////////

DMD 2.065: 
test.d(7): Error: == has no effect in expression (fun().i == 4)

DMD master compiles.

Introduced in https://github.com/D-Programming-Language/dmd/pull/3186

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