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Description of problem:
outline of the code:
set< string > urlset;
for ( i = 0; i < N; i++ ) {
....
urlset = someFunctionWhichReturnsSet(i,...); // Works the first time
i++;
...
}

This works during the first pass of the for loop. Doesn't work from the next
time. I tried the "set.erase()" call and other such tricks.

IT WORKS WITH GCC2.9XXX ( RH 2.96, that is ... both on RH 7.3 and on 8.0 with
compat* packages )

Version-Release number of selected component (if applicable):


How reproducible:
Always

Steps to Reproduce:
1.Write any program like the above
2.Compile it ( does compile )
3.Fails if compiler gcc3.2 ( not checked with other gcc3.x )
Did not work with the one in rawhide too.
	

Actual Results:  The "set" data structure contained no members. set.size()
returned 0 from the second time onwards.
Worked fine with gcc2.95/6

Expected Results:  Whatever happened with gcc2.95/6 was the expected way it
should have run

Additional info:

No error messages as such. The output was not as expected.
I'm sorry if the information I've provided is not enough. Tried my best though!

Severity is mentioned "high" because it is of a lot of importance to developers,
as a lot of my code has stopped working!