[perl #82250] fix tainted (s)print format

commit 20ee07fbbcfa6be9f90bb8e5474a4d69d7396617
introduced dieing in (s)printf when the format is tainted;
however it only worked when the format is part of an expression
(because TAINT_PROPER checks for PL_tainted being set).

Fix by doing TAINT_PROPER only after get magic has been done on the format
SV (which will set PL_tainted). This is done by moving the checks in
pp_sprintf and pp_prtf into do_sprintf() (which is called by the two pp
functions).

1 files changed, 0 insertions, 2 deletions

diff --git a/pp.c b/pp.c
index 4bf4b181f1..751a0bf79e 100644
--- a/pp.c
+++ b/pp.c
@@ -3708,8 +3708,6 @@ PP(pp_index)
 PP(pp_sprintf)
 {
     dVAR; dSP; dMARK; dORIGMARK; dTARGET;
-    if (SvTAINTED(MARK[1]))
-	TAINT_PROPER("sprintf");
     SvTAINTED_off(TARG);
     do_sprintf(TARG, SP-MARK, MARK+1);
     TAINT_IF(SvTAINTED(TARG));