Use HEKf

This avoids creating a lot of temporary SVs.

1 files changed, 3 insertions, 2 deletions

diff --git a/mro.c b/mro.c
index 67c77ebe81..1d60387869 100644
--- a/mro.c
+++ b/mro.c
@@ -224,8 +224,9 @@ S_mro_get_linear_isa_dfs(pTHX_ HV *stash, U32 level)
       Perl_croak(aTHX_ "Can't linearize anonymous symbol table");
 
     if (level > 100)
-        Perl_croak(aTHX_ "Recursive inheritance detected in package '%"SVf"'",
-		   SVfARG(sv_2mortal(newSVhek(stashhek))));
+        Perl_croak(aTHX_
+		  "Recursive inheritance detected in package '%"HEKf"'",
+		   HEKfARG(stashhek));
 
     meta = HvMROMETA(stash);