CINT stringstream bug

The following code snippet (attached as a macro), produces different results in interpreted mode and when compiled (with recent development root):

stringstream s("a b c");
string tmp;
while (s >> tmp) cout << tmp << endl;

For some reason, the "s >> tmp" evaluates to false one "step" too early in interpreted mode. Example session is below.

dev pplxgenng:~> root -q cint_stringstream.C Processing cint_stringstream.C...
a
b

dev pplxgenng:~> root -q cint_stringstream.C+ Processing cint_stringstream.C+...
a
b
c

Regards,
Philip