Fix assertion failed in Complex.polar without NDEBUG (#3551)

Fixes [Bug #17172].

1 files changed, 8 insertions, 0 deletions

diff --git a/complex.c b/complex.c
index b8dd6169ae..4100fac082 100644
--- a/complex.c
+++ b/complex.c
@@ -732,6 +732,14 @@ nucomp_s_polar(int argc, VALUE *argv, VALUE klass)
 	nucomp_real_check(arg);
 	break;
     }
+    if (RB_TYPE_P(abs, T_COMPLEX)) {
+        get_dat1(abs);
+        abs = dat->real;
+    }
+    if (RB_TYPE_P(arg, T_COMPLEX)) {
+        get_dat1(arg);
+        arg = dat->real;
+    }
     return f_complex_polar(klass, abs, arg);
 }