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authornobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2018-12-23 11:11:36 +0000
committernobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2018-12-23 11:11:36 +0000
commitd397c89f88e5098f9e9fb7034249505caf993f67 (patch)
tree5ebb190b6673d8e8f33899646ef6aaceb25668fa /eval.c
parent71e458023d9332745b8a5f25b169ffbd2c5a2a89 (diff)
Prohibit circular causes [Bug #15447]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66510 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'eval.c')
-rw-r--r--eval.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/eval.c b/eval.c
index 0a676ef..e0eb5c5 100644
--- a/eval.c
+++ b/eval.c
@@ -491,6 +491,7 @@ static inline VALUE
exc_setup_message(const rb_execution_context_t *ec, VALUE mesg, VALUE *cause)
{
int nocause = 0;
+ int nocircular = 0;
if (NIL_P(mesg)) {
mesg = ec->errinfo;
@@ -500,18 +501,32 @@ exc_setup_message(const rb_execution_context_t *ec, VALUE mesg, VALUE *cause)
if (NIL_P(mesg)) {
mesg = rb_exc_new(rb_eRuntimeError, 0, 0);
nocause = 0;
+ nocircular = 1;
}
if (*cause == Qundef) {
if (nocause) {
*cause = Qnil;
+ nocircular = 1;
}
else if (!rb_ivar_defined(mesg, id_cause)) {
*cause = get_ec_errinfo(ec);
}
+ else {
+ nocircular = 1;
+ }
}
else if (!NIL_P(*cause) && !rb_obj_is_kind_of(*cause, rb_eException)) {
rb_raise(rb_eTypeError, "exception object expected");
}
+
+ if (!nocircular && !NIL_P(*cause) && *cause != Qundef && *cause != mesg) {
+ VALUE c = *cause;
+ while (!NIL_P(c = rb_attr_get(c, id_cause))) {
+ if (c == mesg) {
+ rb_raise(rb_eArgError, "circular causes");
+ }
+ }
+ }
return mesg;
}