c++/670: 2.91.66, 2.95.2 and 2.96 seem to call too many destructors.

Sun Oct 22 14:56:00 GMT 2000

>Number:         670
>Category:       c++
>Synopsis:       2.91.66, 2.95.2 and 2.96 seem to call too many destructors.
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sun Oct 22 14:56:00 PDT 2000
>Closed-Date:
>Last-Modified:
>Originator:     Sean Clarke
>Release:        Redhat 6.2 - 2.91.66, also detected in 2.95 and RH7 2.96 - gcc version 2.96 20000731
>Organization:
>Environment:
RedHat Linux 6.0, 6.1, 6.2, 7.0
>Description:
There appears to be a bug in gcc, can someone confirm ?. Attached is a
cpp file that demonstrates the problem which seems to cause the compiler
to call one (or more) too many destructors, we detected the problem
whilst porting an HP application to Linux and traced the core dumps etc.
to some code that wasn't too well written
(i.e. it was passing the object by value instead of by reference) anyway
it appears the compiler does something horrible, calls too many
destructors, and when we try to delete the object/use the object....
BANG.
>How-To-Repeat:
Just compile the attached program, you will see the counter value being output to sdout (increments and decrements when constructed or destructed).
you will see too many destructors being called.
>Fix:
no known fix, problem does not manifist itself if objects are always passed by reference (I think).
>Release-Note:
>Audit-Trail:
>Unformatted:
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Content-Type: application/octet-stream; name="test.cpp"
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Content-Disposition: attachment; filename="test.cpp"

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