[Bug bootstrap/87252] gcc-4.4 cross-builds broken, apparently in self-tests

[dmalcolm at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87252

--- Comment #4 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Looks like it's crashing on a virtual function call, within the code I added in
r263564.

It says "pure virtual method called", but it's calling it on an instance of 
text_range_label (on the stack), which is a concrete class, with an
implementation of "get_text" - albeit one defined in gcc-rich-location.h.  Is
there something about this that was problematic with older g++ versions?