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-rw-r--r--eval_error.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/eval_error.c b/eval_error.c
index 8aab7ba05d..f9756f65ac 100644
--- a/eval_error.c
+++ b/eval_error.c
@@ -226,7 +226,7 @@ static void
show_cause(VALUE errinfo, VALUE str, VALUE highlight, VALUE reverse)
{
VALUE cause = rb_attr_get(errinfo, id_cause);
- if (!NIL_P(cause)) {
+ if (!NIL_P(cause) && rb_obj_is_kind_of(cause, rb_eException)) {
volatile VALUE eclass = CLASS_OF(cause);
VALUE errat = rb_get_backtrace(cause);
VALUE emesg = rb_get_message(cause);