[Issue 8842] New: Error line numbers for some run-time functions in debug mode?

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=8842

           Summary: Error line numbers for some run-time functions in
                    debug mode?
           Product: D
           Version: D2
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: enhancement
          Priority: P2
         Component: druntime
        AssignedTo: nobody at puremagic.com
        ReportedBy: bearophile_hugs at eml.cc


--- Comment #0 from bearophile_hugs at eml.cc 2012-10-17 15:35:01 PDT ---
void main() {
    int[] foo;
    auto bar = new int[10];
    foo[] = bar[];
}


Currently that code gives a runtime error with no line number, dmd 2.061alpha:

object.Error: lengths don't match for array copy

The stack trace helps find the location of such error, but maybe in debug mode
(-debug) it's worth using a different _d_arraycopy run-time function that
accepts line numbers too (named _d_arraycopy_line or something), so it's able
to generate a more specific error message.

This line number inflates the binary, but in debug mode what's important is to
locate the errors very well.

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