X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=pp_hot.c;h=6fb53d49a4c303f56b0e43e120d41c02b6594312;hb=fca1d8b34fac5a740ae67bc3b873bc01cd76a8a9;hp=35e88688c1e554b929590a94d8c46e6a28027680;hpb=08aeb9f701fa786d490e79e99ac2f9f9de229da3;p=p5sagit%2Fp5-mst-13.2.git

diff --git a/pp_hot.c b/pp_hot.c
index 35e8868..6fb53d4 100644
--- a/pp_hot.c
+++ b/pp_hot.c
@@ -168,18 +168,44 @@ PP(pp_sassign)
 	if (!got_coderef) {
 	    /* We've been returned a constant rather than a full subroutine,
 	       but they expect a subroutine reference to apply.  */
-	    ENTER;
-	    SvREFCNT_inc_void(SvRV(cv));
-	    /* newCONSTSUB takes a reference count on the passed in SV
-	       from us.  We set the name to NULL, otherwise we get into
-	       all sorts of fun as the reference to our new sub is
-	       donated to the GV that we're about to assign to.
-	    */
-	    SvRV_set(left, (SV *)newCONSTSUB(GvSTASH(right), NULL,
+	    if (SvROK(cv)) {
+		ENTER;
+		SvREFCNT_inc_void(SvRV(cv));
+		/* newCONSTSUB takes a reference count on the passed in SV
+		   from us.  We set the name to NULL, otherwise we get into
+		   all sorts of fun as the reference to our new sub is
+		   donated to the GV that we're about to assign to.
+		*/
+		SvRV_set(left, (SV *)newCONSTSUB(GvSTASH(right), NULL,
 						 SvRV(cv)));
-	    SvREFCNT_dec(cv);
-	    LEAVE;
+		SvREFCNT_dec(cv);
+		LEAVE;
+	    } else {
+		/* What can happen for the corner case *{"BONK"} = \&{"BONK"};
+		   is that
+		   First:   ops for \&{"BONK"}; return us the constant in the
+			    symbol table
+		   Second:  ops for *{"BONK"} cause that symbol table entry
+			    (and our reference to it) to be upgraded from RV
+			    to typeblob)
+		   Thirdly: We get here. cv is actually PVGV now, and its
+			    GvCV() is actually the subroutine we're looking for
+
+		   So change the reference so that it points to the subroutine
+		   of that typeglob, as that's what they were after all along.
+		*/
+		GV *const upgraded = (GV *) cv;
+		CV *const source = GvCV(upgraded);
+
+		assert(source);
+		assert(CvFLAGS(source) & CVf_CONST);
+
+		SvREFCNT_inc_void(source);
+		SvREFCNT_dec(upgraded);
+		SvRV_set(left, (SV *)source);
+	    }
 	}
+
     }
     SvSetMagicSV(right, left);
     SETs(right);
@@ -1005,6 +1031,8 @@ PP(pp_aassign)
 		}
 		TAINT_NOT;
 	    }
+	    if (PL_delaymagic & DM_ARRAY)
+		SvSETMAGIC((SV*)ary);
 	    break;
 	case SVt_PVHV: {				/* normal hash */
 		SV *tmpstr;
@@ -1152,14 +1180,6 @@ PP(pp_aassign)
 	    *relem++ = (lelem <= lastlelem) ? *lelem++ : &PL_sv_undef;
     }
 
-    /* This is done at the bottom and in this order because
-       mro_isa_changed_in() can throw exceptions */
-    if(PL_delayedisa) {
-        HV* stash = PL_delayedisa;
-        PL_delayedisa = NULL;
-        mro_isa_changed_in(stash);
-    }
-
     RETURN;
 }
 
@@ -1266,9 +1286,12 @@ PP(pp_match)
 	    }
 	}
     }
-    /* remove comment to get faster /g but possibly unsafe $1 vars after a
-       match. Test for the unsafe vars will fail as well*/
-    if (( /* !global &&  */ rx->nparens) 
+    /* XXX: comment out !global get safe $1 vars after a
+       match, BUT be aware that this leads to dramatic slowdowns on
+       /g matches against large strings.  So far a solution to this problem
+       appears to be quite tricky.
+       Test for the unsafe vars are TODO for now. */
+    if ((  !global &&  rx->nparens) 
 	    || SvTEMP(TARG) || PL_sawampersand ||
 	    (rx->extflags & (RXf_EVAL_SEEN|RXf_PMf_KEEPCOPY)))
 	r_flags |= REXEC_COPY_STR;
@@ -2710,9 +2733,6 @@ try_autoload:
 
     gimme = GIMME_V;
     if ((PL_op->op_private & OPpENTERSUB_DB) && GvCV(PL_DBsub) && !CvNODEBUG(cv)) {
-        if (CvASSERTION(cv) && PL_DBassertion)
-	    sv_setiv(PL_DBassertion, 1);
-	
 	 Perl_get_db_sub(aTHX_ &sv, cv);
 	 if (CvISXSUB(cv))
 	     PL_curcopdb = PL_curcop;
@@ -3019,7 +3039,7 @@ S_method_common(pTHX_ SV* meth, U32* hashp)
 		packsv = sv;
             else {
 	        SV* const ref = newSViv(PTR2IV(stash));
-	        hv_store(PL_stashcache, packname, packlen, ref, 0);
+	        (void)hv_store(PL_stashcache, packname, packlen, ref, 0);
 	    }
 	    goto fetch;
 	}