c++/6925: No warning given for sub-expression with no effect in delete statement

[moz at compsoc dot man dot ac dot uk]

>Number:         6925
>Category:       c++
>Synopsis:       No warning given for sub-expression with no effect in delete statement
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    unassigned
>State:          open
>Class:          change-request
>Submitter-Id:   net
>Arrival-Date:   Mon Jun 03 16:56:00 PDT 2002
>Closed-Date:
>Last-Modified:
>Originator:     moz@compsoc.man.ac.uk
>Release:        gcc-3.1
>Organization:
>Environment:
Linux RedHat 7.0
>Description:
This code :

      1 int main()
      2 {
      3         int * p1 = 0;
      4         int * p2 = 0;
      5
      6         /* compile with -Wall */
      7         p1, p2;
      8         delete p1, p2;
      9 }

compiled with g++ -Wall gives a warning for no effect
on line 7, but not line 8 (where the sub-expression
p1 has no effect).

See responses at 

http://gcc.gnu.org/ml/gcc/2001-07/msg01983.html
>How-To-Repeat:
Compile given code in g++ with -Wall
>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted: