[Issue 2568] New: Warning Inside Template Causes Instantiation Error

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=2568

           Summary: Warning Inside Template Causes Instantiation Error
           Product: D
           Version: 1.039
          Platform: PC
        OS/Version: Windows
            Status: NEW
          Keywords: rejects-valid
          Severity: minor
          Priority: P2
         Component: DMD
        AssignedTo: bugzilla at digitalmars.com
        ReportedBy: business3 at twistedpairgaming.com


-----------------
void foo(T)(T arg)
{
    int i = 999;
    byte b = i;
}

void main()
{
    float f;
    foo(f);
}
-----------------

The above code compiles correctly with warnings disabled. But when warnings are
enabled, an template instantiation error is generated:

-----------------
warning - main.d(4): Error: implicit conversion of expression (i) of type int
to byte can cause loss of data
main.d(10): template instance main_.foo!(float) error instantiating
-----------------

This might be related to #2567 and DMD's general treatment of warnings as
errors.


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