X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=pp.c;h=2958fba4bf10290bde1e113b85514ad7900e4c88;hb=75d1b5dfc310050618a644104f03818db57b4915;hp=910101a44c95eec81e83b3cec79860ee09c34dcd;hpb=132efe8bfb7cd0fb1beb15aaf284e33bf44eb1fa;p=p5sagit%2Fp5-mst-13.2.git

diff --git a/pp.c b/pp.c
index 910101a..2958fba 100644
--- a/pp.c
+++ b/pp.c
@@ -972,6 +972,7 @@ PP(pp_pow)
 		    register unsigned int highbit = 8 * sizeof(UV);
 		    register unsigned int lowbit = 0;
 		    register unsigned int diff;
+		    bool odd_power = (bool)(power & 1);
 		    while ((diff = (highbit - lowbit) >> 1)) {
 			if (baseuv & ~((1 << (lowbit + diff)) - 1))
 			    lowbit += diff;
@@ -994,7 +995,7 @@ PP(pp_pow)
 			    }
 			}
 			SP--;
-			if (baseuok || !(power & 1))
+			if (baseuok || !odd_power)
 			    /* answer is positive */
 			    SETu( result );
 			else if (result <= (UV)IV_MAX)
@@ -3110,6 +3111,8 @@ PP(pp_substr)
 		sv_upgrade(TARG, SVt_PVLV);
 		sv_magic(TARG, Nullsv, PERL_MAGIC_substr, Nullch, 0);
 	    }
+	    else
+		(void)SvOK_off(TARG);
 
 	    LvTYPE(TARG) = 'x';
 	    if (LvTARG(TARG) != sv) {