if (HeVAL(entry) && SvREADONLY(HeVAL(entry))) {
SV* keysv = hv_iterkeysv(entry);
Perl_croak(aTHX_
- "Attempt to delete readonly key '%_' from a restricted hash",
- keysv);
+ "Attempt to delete readonly key '%"SVf"' from a restricted hash",
+ keysv);
}
SvREFCNT_dec(HeVAL(entry));
HeVAL(entry) = &PL_sv_undef;