With gcc (GCC) 3.3.5 20050117 (prerelease) (SUSE Linux) I get:
Failed Test Stat Wstat Total Fail Failed List of Failed
------------------------------------------------------------------------
-------
t/pmc/complex.t 2 512 32 2 6.25% 27-28
OTOH gcc 4.1 works fine. Both on x86/linux, 32-bit.
$ perl -Ilib t/pmc/complex.t
...
not ok 27 - exp of complex numbers
# Failed test (t/pmc/complex.t at line 818)
# got: '0.540302+0.841471i
# -0.416147+0.909297i
# -3.07493+6.71885i
# 0+1.22461e-16i
# '
# expected: '0.540302+0.841471i
# -0.416147+0.909297i
# -3.07493+6.71885i
# 0+0i
# '
...
leo