[Bug c++/36016] New: for-loop scoping problem: Method gets called after destructor

["gnu4u at flonatel dot org" <gcc-bugzilla at gcc dot gnu dot org>]

Hello!

In my opinion the g++ compiler has a problem with for-loop scoping.  (Please
see attached code snipplet.)  The output of the program is:

+++ For Loop +++
Constructor of LoopMe with=98
Destructor of LoopMe with=98
LoopMe op+= called
**** I'm invalid and destroyed already ****
Constructor of LoopMe with=99
Destructor of LoopMe with=99
LoopMe op+= called
**** I'm invalid and destroyed already ****
Constructor of LoopMe with=100
Destructor of LoopMe with=100
+++ While Loop +++
Constructor of LoopMe with=98
LoopMe op+= called
Destructor of LoopMe with=98
Constructor of LoopMe with=99
LoopMe op+= called
Destructor of LoopMe with=99
Constructor of LoopMe with=100
Destructor of LoopMe with=100

IMHO the while loop is correct, while in the for loop, the destructor is called
too early.

It was also possible to reproduce this on the following architectures:
   * g++ (GCC) 3.3.2 [Build from original sources]
      (sparc, Solaris 8)
   * g++ (GCC) 4.1.0 [Build from original sources]
      (sparc, Solaris 9)
   * g++ (GCC) 4.1.0 [Build from original sources]
      (x86, Redhat9 with kernel 2.6.12.3)
   * g++ (GCC) 4.2.3 (Debian 4.2.3-2) 
      (x86, Debian unstable with kernel 2.6.24-1-686)
   * g++ (GCC) 4.2.3 (Debian 4.2.3-1)
      (x86, Debian unstable with kernel 2.6.23-1-686)
   * g++-4.3 (Debian 4.3-20080227-1) 4.3.0 20080227 (prerelease)
[gcc-4_3-branch revision 132730]
      (x86, Debian unstable with kernel 2.6.24-1-686)

Some searches in this bug database revealed, that Bug#13865 and Bug#16034 look
similar, but both are marked as fixed for some years now.

If you need additional information, just drop me a mail.

Kind regards

Andreas Florath


-- 
           Summary: for-loop scoping problem: Method gets called after
                    destructor
           Product: gcc
           Version: 4.1.0
            Status: UNCONFIRMED
          Severity: minor
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: gnu4u at flonatel dot org
 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=36016