[Issue 2434] New: Compiler generates code that does not pass with -w for some array operations

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=2434

           Summary: Compiler generates code that does not pass with -w for
                    some array operations
           Product: D
           Version: 1.036
          Platform: PC
        OS/Version: Windows
            Status: NEW
          Keywords: rejects-valid
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: bugzilla at digitalmars.com
        ReportedBy: jarrett.billingsley at gmail.com


T[] a = [1, 2, 3, 4, 5];
a[] = 1 op a;

Replace T with byte, ubyte, short, or ushort.  Replace op with / or %.  For
example:

byte[] a = [1, 2, 3, 4, 5];
a[] = 1 / a;

All possible combinations give errors like this when -w is enabled:

warning - Error: implicit conversion of expression (cast(int)c0 /
cast(int)(p1[p])) of type int to byte can cause loss of data

The c0, p1, and p variables are what the compiler uses for internal names when
converting array operations into code, so this is an error in the generated
code.

Similar things happen if you have something like:

T[] b = [1, 2, 3, 4, 5];
a[] = b[] op a[];


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