c++/4525: Can't construct member function of class template with pointer to member as argument, if the argument type is constructed out of the template argument

[philipp.bachmann@obtree.com]

>Number:         4525
>Category:       c++
>Synopsis:       Can't construct member function of class template with pointer to member as argument, if the argument type is constructed out of the template argument
>Confidential:   no
>Severity:       critical
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed Oct 10 10:16:02 PDT 2001
>Closed-Date:
>Last-Modified:
>Originator:     Philipp Bachmann
>Release:        g++ 2.95.3
>Organization:
>Environment:
Sun Solaris 7 SPARC
>Description:
Member functions of class templates can't have arguments built out of types "typedef"ed in the classes referred to by the template arguments even if "typename"d.

g++ says
"[1090]$ g++ pointer2member.cxx      
pointer2member.cxx:71: common_type called with uncommon member types (compiler error)"

I don't see why my code is illegal.

Sun Workshop / Forte CC 6 U 1 has no problems with this code. I don't have other compilers at hand, so I can't tell their behaviour.
>How-To-Repeat:
Just comment out line 14 of the code supplied and try to compile.
>Fix:
Workaround: Commenting in line 14 activates a trivial workaround.
>Release-Note:
>Audit-Trail:
>Unformatted:
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