[Bug 77] New: After a compile error occurs, all template instances fail

[d-bugmail at puremagic.com]

http://d.puremagic.com/bugzilla/show_bug.cgi?id=77

           Summary: After a compile error occurs, all template instances
                    fail
           Product: D
           Version: 0.150
          Platform: All
        OS/Version: Windows
            Status: NEW
          Severity: major
          Priority: P2
         Component: DMD
        AssignedTo: bugzilla at digitalmars.com
        ReportedBy: clugdbug at yahoo.com.au


This is the simplest example I could come up with. If you swap the order of
line(10) and line(11), you just get "undefined identifier b". With the order as
written, the correct error is followed by spurious error messages:

mar30.d(10): undefined identifier b
mar30.d(11): voids have no value
mar30.d(11): cannot implicitly convert expression (dog!(int)) of type void to
in
t

And with a real project, thousands of lines of incorrect error messages can be
generated by a single typo! In fact, I now encounter this bug every time I get
any error message at all. I'd rank it as the most annoying bug in DMD. I
consider this severity=major -- I've had to temporarily abandon some of my
metaprogramming work because of it.

-------
template dog(pig) {
    const int dog=2;
}

void main() {
    int a;
    a=b;              // line (10)
    a = dog!(int);    // line (11)
}


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