[Bug other/42540] New: c++ error message [vtable undefined] is unhelpful

[debian-gcc at lists dot debian dot org]

class A {
    A();

    virtual void B();
};

A::A() {}
/* Whoops, I forgot to define A::B() */

$ g++ -Wall a.cc 
/usr/lib/../lib/crt1.o: In function `_start':
(.text+0x20): undefined reference to `main'
/tmp/ccaVlePI.o: In function `A::A()':
a.cc:(.text+0xf): undefined reference to `vtable for A'
collect2: ld returned 1 exit status

bug submitter writes:
"To be clear: the problem is that the error message only mentions the
constructor, and the vtable. It doesn't mention the method A::B(), which is
actually the problem. On a less-minimal example it could take much longer to
work out what the real problem is."


-- 
           Summary: c++ error message [vtable undefined] is unhelpful
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: other
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: debian-gcc at lists dot debian dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42540