I know the attached code is horrible, but I inherited something like it at my
place of work.
The call through the "Broken" function pointer works correctly (e.g. doesn't
assert) on gcc 3.3 and gcc 3.4, but asserts on gcc 4.1.1 because the "this"
pointer is incorrect. If "mem_fun" is changed to be "void (Base::*mem_fun)
()", (e.g. not varargs), the code works correctly.
Again, I don't like this code and would never write code like this myself, its
just something I've inherited and it breaks with the latest GCC so I wanted to
let you know. Visual Studio 2005 won't even compile the code - it won't accept
the function pointer casts.
Testcase attached.
--
Summary: Bad this pointer when calling thru pointer to varargs
method
Product: gcc
Version: 4.1.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: gcc-bklyn at sneakemail dot com
GCC build triplet: i486-linux-gnu
GCC host triplet: i486-linux-gnu
GCC target triplet: i486-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29243
