Check each line of config_re output.

[p5sagit/p5-mst-13.2.git] / mg.c

diff --git a/mg.c b/mg.c
index f79210e..4ab7f4f 100644 (file)
--- a/mg.c
+++ b/mg.c
@@ -1,7 +1,7 @@
 /*    mg.c
  *
  *    Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
- *    2000, 2001, 2002, 2003, by Larry Wall and others
+ *    2000, 2001, 2002, 2003, 2004, by Larry Wall and others
  *
  *    You may distribute under the terms of either the GNU General Public
  *    License or the Artistic License, as specified in the README file.
@@ -129,6 +129,18 @@ Perl_mg_get(pTHX_ SV *sv)
     int new = 0;
     MAGIC *newmg, *head, *cur, *mg;
     I32 mgs_ix = SSNEW(sizeof(MGS));
+    int was_temp = SvTEMP(sv);
+    /* guard against sv having being freed midway by holding a private
+       reference. */
+
+    /* sv_2mortal has this side effect of turning on the TEMP flag, which can
+       cause the SV's buffer to get stolen (and maybe other stuff).
+       So restore it.
+    */
+    sv_2mortal(SvREFCNT_inc(sv));
+    if (!was_temp) {
+       SvTEMP_off(sv);
+    }
 
     save_magic(mgs_ix, sv);
 
@@ -143,10 +155,6 @@ Perl_mg_get(pTHX_ SV *sv)
        if (!(mg->mg_flags & MGf_GSKIP) && vtbl && vtbl->svt_get) {
            CALL_FPTR(vtbl->svt_get)(aTHX_ sv, mg);
 
-           /* guard against sv having been freed */
-           if (SvTYPE(sv) == SVTYPEMASK) {
-               Perl_croak(aTHX_ "Tied variable freed while still in use");
-           }
            /* guard against magic having been deleted - eg FETCH calling
             * untie */
            if (!SvMAGIC(sv))
@@ -178,6 +186,12 @@ Perl_mg_get(pTHX_ SV *sv)
     }
 
     restore_magic(aTHX_ INT2PTR(void *, (IV)mgs_ix));
+
+    if (SvREFCNT(sv) == 1) {
+       /* We hold the last reference to this SV, which implies that the
+          SV was deleted as a side effect of the routines we called.  */
+       SvOK_off(sv);
+    }
     return 0;
 }
 
@@ -491,12 +505,12 @@ Perl_magic_len(pTHX_ SV *sv, MAGIC *mg)
            }
            else {
                if (ckWARN(WARN_UNINITIALIZED))
-                   report_uninit();
+                   report_uninit(sv);
            }
        }
        else {
            if (ckWARN(WARN_UNINITIALIZED))
-               report_uninit();
+               report_uninit(sv);
        }
        return 0;
     case '+':
@@ -566,9 +580,6 @@ Perl_magic_get(pTHX_ SV *sv, MAGIC *mg)
 
     case '\004':               /* ^D */
        sv_setiv(sv, (IV)(PL_debug & DEBUG_MASK));
-#if defined(YYDEBUG) && defined(DEBUGGING)
-       PL_yydebug = DEBUG_p_TEST;
-#endif
        break;
     case '\005':  /* ^E */
         if (*(mg->mg_ptr+1) == '\0') {
@@ -1783,16 +1794,21 @@ Perl_magic_setsubstr(pTHX_ SV *sv, MAGIC *mg)
        sv_utf8_upgrade(lsv);
        sv_pos_u2b(lsv, &lvoff, &lvlen);
        sv_insert(lsv, lvoff, lvlen, tmps, len);
+       LvTARGLEN(sv) = sv_len_utf8(sv);
        SvUTF8_on(lsv);
     }
     else if (lsv && SvUTF8(lsv)) {
        sv_pos_u2b(lsv, &lvoff, &lvlen);
+       LvTARGLEN(sv) = len;
        tmps = (char*)bytes_to_utf8((U8*)tmps, &len);
        sv_insert(lsv, lvoff, lvlen, tmps, len);
        Safefree(tmps);
     }
-    else
-        sv_insert(lsv, lvoff, lvlen, tmps, len);
+    else {
+       sv_insert(lsv, lvoff, lvlen, tmps, len);
+       LvTARGLEN(sv) = len;
+    }
+
 
     return 0;
 }
@@ -2091,14 +2107,14 @@ Perl_magic_set(pTHX_ SV *sv, MAGIC *mg)
        break;
     case '\017':       /* ^O */
        if (*(mg->mg_ptr+1) == '\0') {
-           if (PL_osname)
+           if (PL_osname) {
                Safefree(PL_osname);
+               PL_osname = Nullch;
+           }
            if (SvOK(sv)) {
                TAINT_PROPER("assigning to $^O");
                PL_osname = savepv(SvPV(sv,len));
            }
-           else
-               PL_osname = Nullch;
        }
        else if (strEQ(mg->mg_ptr, "\017PEN")) {
            if (!PL_compiling.cop_io)