d_nv_preserves_uv_bits
[p5sagit/p5-mst-13.2.git] / op.c
diff --git a/op.c b/op.c
index 4468e4c..d00abec 100644 (file)
--- a/op.c
+++ b/op.c
@@ -199,7 +199,7 @@ Perl_pad_allocmy(pTHX_ char *name)
                    || ((SvFLAGS(sv) & SVpad_OUR) && GvSTASH(sv) == ourstash))
                && strEQ(name, SvPVX(sv)))
            {
-               Perl_warner(aTHX_ WARN_MISC,
+               Perl_warner(aTHX_ packWARN(WARN_MISC),
                    "\"%s\" variable %s masks earlier declaration in same %s",
                    (PL_in_my == KEY_our ? "our" : "my"),
                    name,
@@ -216,9 +216,9 @@ Perl_pad_allocmy(pTHX_ char *name)
                    && ((SvFLAGS(sv) & SVpad_OUR) && GvSTASH(sv) == ourstash)
                    && strEQ(name, SvPVX(sv)))
                {
-                   Perl_warner(aTHX_ WARN_MISC,
+                   Perl_warner(aTHX_ packWARN(WARN_MISC),
                        "\"our\" variable %s redeclared", name);
-                   Perl_warner(aTHX_ WARN_MISC,
+                   Perl_warner(aTHX_ packWARN(WARN_MISC),
                        "\t(Did you mean \"local\" instead of \"our\"?)\n");
                    break;
                }
@@ -359,7 +359,7 @@ S_pad_findlex(pTHX_ char *name, PADOFFSET newoff, U32 seq, CV* startcv,
                                    if (ckWARN(WARN_CLOSURE)
                                        && !CvUNIQUE(bcv) && !CvUNIQUE(cv))
                                    {
-                                       Perl_warner(aTHX_ WARN_CLOSURE,
+                                       Perl_warner(aTHX_ packWARN(WARN_CLOSURE),
                                          "Variable \"%s\" may be unavailable",
                                             name);
                                    }
@@ -372,7 +372,7 @@ S_pad_findlex(pTHX_ char *name, PADOFFSET newoff, U32 seq, CV* startcv,
                        if (ckWARN(WARN_CLOSURE) && !SvFAKE(sv) && !CvUNIQUE(cv)
                            && !(SvFLAGS(sv) & SVpad_OUR))
                        {
-                           Perl_warner(aTHX_ WARN_CLOSURE,
+                           Perl_warner(aTHX_ packWARN(WARN_CLOSURE),
                                "Variable \"%s\" will not stay shared", name);
                        }
                    }
@@ -509,7 +509,7 @@ Perl_pad_leavemy(pTHX_ I32 fill)
     if (PL_min_intro_pending && fill < PL_min_intro_pending) {
        for (off = PL_max_intro_pending; off >= PL_min_intro_pending; off--) {
            if ((sv = svp[off]) && sv != &PL_sv_undef && ckWARN_d(WARN_INTERNAL))
-               Perl_warner(aTHX_ WARN_INTERNAL, "%s never introduced", SvPVX(sv));
+               Perl_warner(aTHX_ packWARN(WARN_INTERNAL), "%s never introduced", SvPVX(sv));
        }
     }
     /* "Deintroduce" my variables that are leaving with this scope. */
@@ -925,9 +925,11 @@ S_cop_free(pTHX_ COP* cop)
        SvREFCNT_dec(cop->cop_warnings);
     if (! specialCopIO(cop->cop_io)) {
 #ifdef USE_ITHREADS
+#if 0
        STRLEN len;
         char *s = SvPV(cop->cop_io,len);
-       Perl_warn(aTHX_ "io='%.*s'",(int) len,s);
+       Perl_warn(aTHX_ "io='%.*s'",(int) len,s); /* ??? --jhi */
+#endif
 #else
        SvREFCNT_dec(cop->cop_io);
 #endif
@@ -993,7 +995,7 @@ S_scalarboolean(pTHX_ OP *o)
 
            if (PL_copline != NOLINE)
                CopLINE_set(PL_curcop, PL_copline);
-           Perl_warner(aTHX_ WARN_SYNTAX, "Found = in conditional, should be ==");
+           Perl_warner(aTHX_ packWARN(WARN_SYNTAX), "Found = in conditional, should be ==");
            CopLINE_set(PL_curcop, oldline);
        }
     }
@@ -1027,7 +1029,7 @@ Perl_scalar(pTHX_ OP *o)
     case OP_SPLIT:
        if ((kid = cLISTOPo->op_first) && kid->op_type == OP_PUSHRE) {
            if (!kPMOP->op_pmreplroot)
-               deprecate("implicit split to @_");
+               deprecate_old("implicit split to @_");
        }
        /* FALL THROUGH */
     case OP_MATCH:
@@ -1065,7 +1067,7 @@ Perl_scalar(pTHX_ OP *o)
        break;
     case OP_SORT:
        if (ckWARN(WARN_VOID))
-           Perl_warner(aTHX_ WARN_VOID, "Useless use of sort in scalar context");
+           Perl_warner(aTHX_ packWARN(WARN_VOID), "Useless use of sort in scalar context");
     }
     return o;
 }
@@ -1274,12 +1276,12 @@ Perl_scalarvoid(pTHX_ OP *o)
     case OP_SPLIT:
        if ((kid = cLISTOPo->op_first) && kid->op_type == OP_PUSHRE) {
            if (!kPMOP->op_pmreplroot)
-               deprecate("implicit split to @_");
+               deprecate_old("implicit split to @_");
        }
        break;
     }
     if (useless && ckWARN(WARN_VOID))
-       Perl_warner(aTHX_ WARN_VOID, "Useless use of %s in void context", useless);
+       Perl_warner(aTHX_ packWARN(WARN_VOID), "Useless use of %s in void context", useless);
     return o;
 }
 
@@ -2184,7 +2186,7 @@ Perl_bind_match(pTHX_ I32 type, OP *left, OP *right)
       const char *sample = ((left->op_type == OP_RV2AV ||
                             left->op_type == OP_PADAV)
                            ? "@array" : "%hash");
-      Perl_warner(aTHX_ WARN_MISC,
+      Perl_warner(aTHX_ packWARN(WARN_MISC),
              "Applying %s to %s will act on scalar(%s)",
              desc, sample, sample);
     }
@@ -2380,7 +2382,7 @@ Perl_localize(pTHX_ OP *o, I32 lex)
                s++;
 
            if (*s == ';' || *s == '=')
-               Perl_warner(aTHX_ WARN_PARENTHESIS,
+               Perl_warner(aTHX_ packWARN(WARN_PARENTHESIS),
                            "Parentheses missing around \"%s\" list",
                            lex ? (PL_in_my == KEY_our ? "our" : "my") : "local");
        }
@@ -2498,30 +2500,6 @@ Perl_fold_constants(pTHX_ register OP *o)
     }
 
   nope:
-    if (!(PL_opargs[type] & OA_OTHERINT))
-       return o;
-
-    if (!(PL_hints & HINT_INTEGER)) {
-       if (type == OP_MODULO
-           || type == OP_DIVIDE
-           || !(o->op_flags & OPf_KIDS))
-       {
-           return o;
-       }
-
-       for (curop = ((UNOP*)o)->op_first; curop; curop = curop->op_sibling) {
-           if (curop->op_type == OP_CONST) {
-               if (SvIOK(((SVOP*)curop)->op_sv))
-                   continue;
-               return o;
-           }
-           if (PL_opargs[curop->op_type] & OA_RETINTEGER)
-               continue;
-           return o;
-       }
-       o->op_ppaddr = PL_ppaddr[++(o->op_type)];
-    }
-
     return o;
 }
 
@@ -2546,6 +2524,7 @@ Perl_gen_constant_list(pTHX_ register OP *o)
 
     o->op_type = OP_RV2AV;
     o->op_ppaddr = PL_ppaddr[OP_RV2AV];
+    o->op_seq = 0;             /* needs to be revisited in peep() */
     curop = ((UNOP*)o)->op_first;
     ((UNOP*)o)->op_first = newSVOP(OP_CONST, 0, SvREFCNT_inc(*PL_stack_sp--));
     op_free(curop);
@@ -3474,11 +3453,22 @@ Perl_utilize(pTHX_ int aver, I32 floor, OP *version, OP *id, OP *arg)
            newSTATEOP(0, Nullch, imop) ));
 
     if (packname) {
-        if (ckWARN(WARN_MISC) && !gv_stashpvn(packname, packlen, FALSE)) {
-            Perl_warner(aTHX_ WARN_MISC,
-                        "Package `%s' not found "
-                        "(did you use the incorrect case?)", packname);
-        }
+        /* The "did you use incorrect case?" warning used to be here.
+         * The problem is that on case-insensitive filesystems one
+         * might get false positives for "use" (and "require"):
+         * "use Strict" or "require CARP" will work.  This causes
+         * portability problems for the script: in case-strict
+         * filesystems the script will stop working.
+         *
+         * The "incorrect case" warning checked whether "use Foo"
+         * imported "Foo" to your namespace, but that is wrong, too:
+         * there is no requirement nor promise in the language that
+         * a Foo.pm should or would contain anything in package "Foo".
+         *
+         * There is very little Configure-wise that can be done, either:
+         * the case-sensitivity of the build filesystem of Perl does not
+         * help in guessing the case-sensitivity of the runtime environment.
+         */
         safefree(packname);
     }
 
@@ -3908,7 +3898,7 @@ S_new_logop(pTHX_ I32 type, I32 flags, OP** firstp, OP** otherp)
     }
     if (first->op_type == OP_CONST) {
        if (ckWARN(WARN_BAREWORD) && (first->op_private & OPpCONST_BARE))
-           Perl_warner(aTHX_ WARN_BAREWORD, "Bareword found in conditional");
+           Perl_warner(aTHX_ packWARN(WARN_BAREWORD), "Bareword found in conditional");
        if ((type == OP_AND) == (SvTRUE(((SVOP*)first)->op_sv))) {
            op_free(first);
            *firstp = Nullop;
@@ -3955,7 +3945,7 @@ S_new_logop(pTHX_ I32 type, I32 flags, OP** firstp, OP** otherp)
        if (warnop) {
            line_t oldline = CopLINE(PL_curcop);
            CopLINE_set(PL_curcop, PL_copline);
-           Perl_warner(aTHX_ WARN_MISC,
+           Perl_warner(aTHX_ packWARN(WARN_MISC),
                 "Value of %s%s can be \"0\"; test with defined()",
                 PL_op_desc[warnop],
                 ((warnop == OP_READLINE || warnop == OP_GLOB)
@@ -4663,7 +4653,7 @@ Perl_cv_ckproto(pTHX_ CV *cv, GV *gv, char *p)
            Perl_sv_catpvf(aTHX_ msg, "(%s)", p);
        else
            sv_catpv(msg, "none");
-       Perl_warner(aTHX_ WARN_PROTOTYPE, "%"SVf, msg);
+       Perl_warner(aTHX_ packWARN(WARN_PROTOTYPE), "%"SVf, msg);
     }
 }
 
@@ -4778,13 +4768,15 @@ Perl_newATTRSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *attrs, OP *block)
     name = o ? SvPVx(cSVOPo->op_sv, n_a) : Nullch;
     if (!name && PERLDB_NAMEANON && CopLINE(PL_curcop)) {
        SV *sv = sv_newmortal();
-       Perl_sv_setpvf(aTHX_ sv, "__ANON__[%s:%"IVdf"]",
+       Perl_sv_setpvf(aTHX_ sv, "%s[%s:%"IVdf"]",
+                      PL_curstash ? "__ANON__" : "__ANON__::__ANON__",
                       CopFILE(PL_curcop), (IV)CopLINE(PL_curcop));
        aname = SvPVX(sv);
     }
     else
        aname = Nullch;
-    gv = gv_fetchpv(name ? name : (aname ? aname : "__ANON__"),
+    gv = gv_fetchpv(name ? name : (aname ? aname : 
+                   (PL_curstash ? "__ANON__" : "__ANON__::__ANON__")),
                    GV_ADDMULTI | ((block || attrs) ? 0 : GV_NOINIT),
                    SVt_PVCV);
 
@@ -4801,7 +4793,7 @@ Perl_newATTRSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *attrs, OP *block)
            if (!SvPOK((SV*)gv) && !(SvIOK((SV*)gv) && SvIVX((SV*)gv) == -1)
                && ckWARN_d(WARN_PROTOTYPE))
            {
-               Perl_warner(aTHX_ WARN_PROTOTYPE, "Runaway prototype");
+               Perl_warner(aTHX_ packWARN(WARN_PROTOTYPE), "Runaway prototype");
            }
            cv_ckproto((CV*)gv, NULL, ps);
        }
@@ -4861,7 +4853,7 @@ Perl_newATTRSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *attrs, OP *block)
                    line_t oldline = CopLINE(PL_curcop);
                    if (PL_copline != NOLINE)
                        CopLINE_set(PL_curcop, PL_copline);
-                   Perl_warner(aTHX_ WARN_REDEFINE,
+                   Perl_warner(aTHX_ packWARN(WARN_REDEFINE),
                        CvCONST(cv) ? "Constant subroutine %s redefined"
                                    : "Subroutine %s redefined", name);
                    CopLINE_set(PL_curcop, oldline);
@@ -5129,7 +5121,7 @@ Perl_newATTRSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *attrs, OP *block)
                PL_checkav = newAV();
            DEBUG_x( dump_sub(gv) );
            if (PL_main_start && ckWARN(WARN_VOID))
-               Perl_warner(aTHX_ WARN_VOID, "Too late to run CHECK block");
+               Perl_warner(aTHX_ packWARN(WARN_VOID), "Too late to run CHECK block");
            av_unshift(PL_checkav, 1);
            av_store(PL_checkav, 0, (SV*)cv);
            GvCV(gv) = 0;               /* cv has been hijacked */
@@ -5139,7 +5131,7 @@ Perl_newATTRSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *attrs, OP *block)
                PL_initav = newAV();
            DEBUG_x( dump_sub(gv) );
            if (PL_main_start && ckWARN(WARN_VOID))
-               Perl_warner(aTHX_ WARN_VOID, "Too late to run INIT block");
+               Perl_warner(aTHX_ packWARN(WARN_VOID), "Too late to run INIT block");
            av_push(PL_initav, (SV*)cv);
            GvCV(gv) = 0;               /* cv has been hijacked */
        }
@@ -5202,7 +5194,9 @@ Used by C<xsubpp> to hook up XSUBs as Perl subs.
 CV *
 Perl_newXS(pTHX_ char *name, XSUBADDR_t subaddr, char *filename)
 {
-    GV *gv = gv_fetchpv(name ? name : "__ANON__", GV_ADDMULTI, SVt_PVCV);
+    GV *gv = gv_fetchpv(name ? name :
+                       (PL_curstash ? "__ANON__" : "__ANON__::__ANON__"),
+                       GV_ADDMULTI, SVt_PVCV);
     register CV *cv;
 
     if ((cv = (name ? GvCV(gv) : Nullcv))) {
@@ -5218,7 +5212,7 @@ Perl_newXS(pTHX_ char *name, XSUBADDR_t subaddr, char *filename)
                line_t oldline = CopLINE(PL_curcop);
                if (PL_copline != NOLINE)
                    CopLINE_set(PL_curcop, PL_copline);
-               Perl_warner(aTHX_ WARN_REDEFINE,
+               Perl_warner(aTHX_ packWARN(WARN_REDEFINE),
                            CvCONST(cv) ? "Constant subroutine %s redefined"
                                        : "Subroutine %s redefined"
                            ,name);
@@ -5278,7 +5272,7 @@ Perl_newXS(pTHX_ char *name, XSUBADDR_t subaddr, char *filename)
            if (!PL_checkav)
                PL_checkav = newAV();
            if (PL_main_start && ckWARN(WARN_VOID))
-               Perl_warner(aTHX_ WARN_VOID, "Too late to run CHECK block");
+               Perl_warner(aTHX_ packWARN(WARN_VOID), "Too late to run CHECK block");
            av_unshift(PL_checkav, 1);
            av_store(PL_checkav, 0, (SV*)cv);
            GvCV(gv) = 0;               /* cv has been hijacked */
@@ -5287,7 +5281,7 @@ Perl_newXS(pTHX_ char *name, XSUBADDR_t subaddr, char *filename)
            if (!PL_initav)
                PL_initav = newAV();
            if (PL_main_start && ckWARN(WARN_VOID))
-               Perl_warner(aTHX_ WARN_VOID, "Too late to run INIT block");
+               Perl_warner(aTHX_ packWARN(WARN_VOID), "Too late to run INIT block");
            av_push(PL_initav, (SV*)cv);
            GvCV(gv) = 0;               /* cv has been hijacked */
        }
@@ -5324,7 +5318,7 @@ Perl_newFORM(pTHX_ I32 floor, OP *o, OP *block)
            line_t oldline = CopLINE(PL_curcop);
            if (PL_copline != NOLINE)
                CopLINE_set(PL_curcop, PL_copline);
-           Perl_warner(aTHX_ WARN_REDEFINE, "Format %s redefined",name);
+           Perl_warner(aTHX_ packWARN(WARN_REDEFINE), "Format %s redefined",name);
            CopLINE_set(PL_curcop, oldline);
        }
        SvREFCNT_dec(cv);
@@ -5395,7 +5389,7 @@ Perl_oopsAV(pTHX_ OP *o)
 
     default:
        if (ckWARN_d(WARN_INTERNAL))
-           Perl_warner(aTHX_ WARN_INTERNAL, "oops: oopsAV");
+           Perl_warner(aTHX_ packWARN(WARN_INTERNAL), "oops: oopsAV");
        break;
     }
     return o;
@@ -5420,7 +5414,7 @@ Perl_oopsHV(pTHX_ OP *o)
 
     default:
        if (ckWARN_d(WARN_INTERNAL))
-           Perl_warner(aTHX_ WARN_INTERNAL, "oops: oopsHV");
+           Perl_warner(aTHX_ packWARN(WARN_INTERNAL), "oops: oopsHV");
        break;
     }
     return o;
@@ -5436,7 +5430,7 @@ Perl_newAVREF(pTHX_ OP *o)
     }
     else if ((o->op_type == OP_RV2AV || o->op_type == OP_PADAV)
                && ckWARN(WARN_DEPRECATED)) {
-       Perl_warner(aTHX_ WARN_DEPRECATED,
+       Perl_warner(aTHX_ packWARN(WARN_DEPRECATED),
                "Using an array as a reference is deprecated");
     }
     return newUNOP(OP_RV2AV, 0, scalar(o));
@@ -5460,7 +5454,7 @@ Perl_newHVREF(pTHX_ OP *o)
     }
     else if ((o->op_type == OP_RV2HV || o->op_type == OP_PADHV)
                && ckWARN(WARN_DEPRECATED)) {
-       Perl_warner(aTHX_ WARN_DEPRECATED,
+       Perl_warner(aTHX_ packWARN(WARN_DEPRECATED),
                "Using a hash as a reference is deprecated");
     }
     return newUNOP(OP_RV2HV, 0, scalar(o));
@@ -5911,7 +5905,7 @@ Perl_ck_fun(pTHX_ OP *o)
            case OA_AVREF:
                if ((type == OP_PUSH || type == OP_UNSHIFT)
                    && !kid->op_sibling && ckWARN(WARN_SYNTAX))
-                   Perl_warner(aTHX_ WARN_SYNTAX,
+                   Perl_warner(aTHX_ packWARN(WARN_SYNTAX),
                        "Useless use of %s with no values",
                        PL_op_desc[type]);
 
@@ -5921,8 +5915,8 @@ Perl_ck_fun(pTHX_ OP *o)
                    char *name = SvPVx(((SVOP*)kid)->op_sv, n_a);
                    OP *newop = newAVREF(newGVOP(OP_GV, 0,
                        gv_fetchpv(name, TRUE, SVt_PVAV) ));
-                   if (ckWARN(WARN_DEPRECATED))
-                       Perl_warner(aTHX_ WARN_DEPRECATED,
+                   if (ckWARN2(WARN_DEPRECATED, WARN_SYNTAX))
+                       Perl_warner(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX),
                            "Array @%s missing the @ in argument %"IVdf" of %s()",
                            name, (IV)numargs, PL_op_desc[type]);
                    op_free(kid);
@@ -5941,8 +5935,8 @@ Perl_ck_fun(pTHX_ OP *o)
                    char *name = SvPVx(((SVOP*)kid)->op_sv, n_a);
                    OP *newop = newHVREF(newGVOP(OP_GV, 0,
                        gv_fetchpv(name, TRUE, SVt_PVHV) ));
-                   if (ckWARN(WARN_DEPRECATED))
-                       Perl_warner(aTHX_ WARN_DEPRECATED,
+                   if (ckWARN2(WARN_DEPRECATED, WARN_SYNTAX))
+                       Perl_warner(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX),
                            "Hash %%%s missing the %% in argument %"IVdf" of %s()",
                            name, (IV)numargs, PL_op_desc[type]);
                    op_free(kid);
@@ -6199,7 +6193,7 @@ Perl_ck_lfun(pTHX_ OP *o)
 OP *
 Perl_ck_defined(pTHX_ OP *o)           /* 19990527 MJD */
 {
-    if ((o->op_flags & OPf_KIDS) && ckWARN(WARN_DEPRECATED)) {
+    if ((o->op_flags & OPf_KIDS) && ckWARN2(WARN_DEPRECATED, WARN_SYNTAX)) {
        switch (cUNOPo->op_first->op_type) {
        case OP_RV2AV:
            /* This is needed for
@@ -6209,9 +6203,9 @@ Perl_ck_defined(pTHX_ OP *o)              /* 19990527 MJD */
            break;                      /* Globals via GV can be undef */
        case OP_PADAV:
        case OP_AASSIGN:                /* Is this a good idea? */
-           Perl_warner(aTHX_ WARN_DEPRECATED,
+           Perl_warner(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX),
                        "defined(@array) is deprecated");
-           Perl_warner(aTHX_ WARN_DEPRECATED,
+           Perl_warner(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX),
                        "\t(Maybe you should just omit the defined()?)\n");
        break;
        case OP_RV2HV:
@@ -6221,9 +6215,9 @@ Perl_ck_defined(pTHX_ OP *o)              /* 19990527 MJD */
               */
            break;                      /* Globals via GV can be undef */
        case OP_PADHV:
-           Perl_warner(aTHX_ WARN_DEPRECATED,
+           Perl_warner(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX),
                        "defined(%%hash) is deprecated");
-           Perl_warner(aTHX_ WARN_DEPRECATED,
+           Perl_warner(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX),
                        "\t(Maybe you should just omit the defined()?)\n");
            break;
        default:
@@ -6681,7 +6675,7 @@ Perl_ck_join(pTHX_ OP *o)
            char *pmstr = "STRING";
            if (PM_GETRE(kPMOP))
                pmstr = PM_GETRE(kPMOP)->precomp;
-           Perl_warner(aTHX_ WARN_SYNTAX,
+           Perl_warner(aTHX_ packWARN(WARN_SYNTAX),
                        "/%s/ should probably be written as \"%s\"",
                        pmstr, pmstr);
        }
@@ -7096,7 +7090,7 @@ Perl_peep(pTHX_ register OP *o)
                    /* XXX could check prototype here instead of just carping */
                    SV *sv = sv_newmortal();
                    gv_efullname3(sv, gv, Nullch);
-                   Perl_warner(aTHX_ WARN_PROTOTYPE,
+                   Perl_warner(aTHX_ packWARN(WARN_PROTOTYPE),
                                "%s() called too early to check prototype",
                                SvPV_nolen(sv));
                }
@@ -7165,9 +7159,9 @@ Perl_peep(pTHX_ register OP *o)
                    line_t oldline = CopLINE(PL_curcop);
 
                    CopLINE_set(PL_curcop, CopLINE((COP*)o->op_next));
-                   Perl_warner(aTHX_ WARN_EXEC,
+                   Perl_warner(aTHX_ packWARN(WARN_EXEC),
                                "Statement unlikely to be reached");
-                   Perl_warner(aTHX_ WARN_EXEC,
+                   Perl_warner(aTHX_ packWARN(WARN_EXEC),
                                "\t(Maybe you meant system() when you said exec()?)\n");
                    CopLINE_set(PL_curcop, oldline);
                }