diff options
Diffstat (limited to 'universal.c')
| -rw-r--r-- | universal.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/universal.c b/universal.c index 1e5a1a0efe..6ccff2f003 100644 --- a/universal.c +++ b/universal.c @@ -140,6 +140,10 @@ XS(XS_UNIVERSAL_isa) Perl_croak(aTHX_ "Usage: UNIVERSAL::isa(reference, kind)"); sv = ST(0); + + if (!SvOK(sv) || !(SvROK(sv) || SvCUR(sv))) + XSRETURN_UNDEF; + name = (char *)SvPV(ST(1),n_a); ST(0) = boolSV(sv_derived_from(sv, name)); @@ -159,6 +163,10 @@ XS(XS_UNIVERSAL_can) Perl_croak(aTHX_ "Usage: UNIVERSAL::can(object-ref, method)"); sv = ST(0); + + if (!SvOK(sv) || !(SvROK(sv) || SvCUR(sv))) + XSRETURN_UNDEF; + name = (char *)SvPV(ST(1),n_a); rv = &PL_sv_undef; |