c++/4807: A very specific, but simple class heirchy causes gcc to make what appears to be mislocated objects. After the object is created, the address is not accessable, and can not be viewed in the debugger. Adding or removing some variables from the cla

[amendola at altavista dot net]

>Number:         4807
>Category:       c++
>Synopsis:       A very specific, but simple class heirchy causes gcc to make what appears to be mislocated objects. After the object is created, the address is not accessable, and can not be viewed in the debugger. Adding or removing some variables from
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    unassigned
>State:          open
>Class:          wrong-code
>Submitter-Id:   net
>Arrival-Date:   Tue Nov 06 14:26:00 PST 2001
>Closed-Date:
>Last-Modified:
>Originator:     amendola@altavista.net
>Release:        2.96 20000731 (Mandrake Linux 8.1 2.96-0.62mdk)
>Organization:
>Environment:
Mandrake 8.1, Intel PIII. 

>Description:
A very specific, but simple class heirchy causes gcc to 
make what appears to be mislocated objects. After the 
object is created, the address is not accessable, 
and can not be viewed in the debugger. Adding or removing 
some variables from the class definition returns the 
behavior to normal. 
>How-To-Repeat:
run the program in gdb:
gdb program
b main
n
display *ufo

This will now display the error message: Cannot access memory at address 0x90983d6

>Fix:
If you change the code by commenting out three variables:

ClTestVector velocity55;
ClTestVector *drawPosition5657;
ClTestVector velocity1retet;

and recompile. All will be well. The object will now be
viewable in the debugger. 

>Release-Note:
>Audit-Trail:
>Unformatted:
  the class definition returns the behavior to normal. 
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