PVBMs mustn't enter anything that turns SVIVisUV_on().

p4raw-id: //depot/perl@29494

diff --git a/sv.c b/sv.c
index e4deb9d..cd186e4 100644 (file)
--- a/sv.c
+++ b/sv.c
@@ -2159,7 +2159,11 @@ Perl_sv_2iv_flags(pTHX_ register SV *sv, I32 flags)
     dVAR;
     if (!sv)
        return 0;
-    if (SvGMAGICAL(sv)) {
+    if (SvGMAGICAL(sv) || SvTYPE(sv) == SVt_PVBM) {
+       /* PVBMs use the same flag bit as SVf_IVisUV, so must let them
+          cache IVs just in case. In practice it seems that they never
+          actually anywhere accessible by user Perl code, let alone get used
+          in anything other than a string context.  */
        if (flags & SV_GMAGIC)
            mg_get(sv);
        if (SvIOKp(sv))
@@ -2239,7 +2243,9 @@ Perl_sv_2uv_flags(pTHX_ register SV *sv, I32 flags)
     dVAR;
     if (!sv)
        return 0;
-    if (SvGMAGICAL(sv)) {
+    if (SvGMAGICAL(sv) || SvTYPE(sv) == SVt_PVBM) {
+       /* PVBMs use the same flag bit as SVf_IVisUV, so must let them
+          cache IVs just in case.  */
        if (flags & SV_GMAGIC)
            mg_get(sv);
        if (SvIOKp(sv))
@@ -2314,7 +2320,9 @@ Perl_sv_2nv(pTHX_ register SV *sv)
     dVAR;
     if (!sv)
        return 0.0;
-    if (SvGMAGICAL(sv)) {
+    if (SvGMAGICAL(sv) || SvTYPE(sv) == SVt_PVBM) {
+       /* PVBMs use the same flag bit as SVf_IVisUV, so must let them
+          cache IVs just in case.  */
        mg_get(sv);
        if (SvNOKp(sv))
            return SvNVX(sv);