[Bug libstdc++/46151] namespace versioning holes

[jason at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46151

Jason Merrill <jason at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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                 CC|                            |jason at gcc dot gnu.org

--- Comment #1 from Jason Merrill <jason at gcc dot gnu.org> 2010-10-23 19:52:54 UTC ---
The issue comes when we use a versioned type as a member:

# mine.h
#include <string>

struct A
{
  string s;
};

void f (A& a);

Namespace versioning won't affect the mangled name of f, so if the definition
of f and a call to f use different versions of string, we'll get a binary
incompatibility that doesn't show up as a link error.