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-rw-r--r--ChangeLog5
-rw-r--r--proc.c6
2 files changed, 10 insertions, 1 deletions
diff --git a/ChangeLog b/ChangeLog
index 5116b3c7a8..d171954e73 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Tue Jul 17 16:41:32 2012 NARUSE, Yui <naruse@ruby-lang.org>
+
+ * proc.c (rb_proc_arity): return normal value (not -n-1) if it is not
+ a labmda, or it is a labmda and no arg_opts. [Bug #5694]
+
Tue Jul 17 03:56:34 2012 Aaron Patterson <aaron@tenderlovemaking.com>
* ext/psych/lib/psych/visitors/to_ruby.rb: strings with YAML anchors
diff --git a/proc.c b/proc.c
index bb7f4a1a25..9502f98772 100644
--- a/proc.c
+++ b/proc.c
@@ -630,6 +630,10 @@ rb_proc_call_with_block(VALUE self, int argc, VALUE *argv, VALUE pass_procval)
* Proc.new {|*a|}.arity #=> -1
* Proc.new {|a,*b|}.arity #=> -2
* Proc.new {|a,*b, c|}.arity #=> -3
+ * lambda { |a = 0| }.arity #=> -1
+ * lambda { |a, b = 0| }.arity #=> -2
+ * lambda { |a, b = 0, c = 0| }.arity #=> -2
+ * lambda { |(a, b), c = 0| }.arity #=> -2
*/
static VALUE
@@ -648,7 +652,7 @@ rb_proc_arity(VALUE self)
iseq = proc->block.iseq;
if (iseq) {
if (BUILTIN_TYPE(iseq) != T_NODE) {
- if (iseq->arg_rest < 0) {
+ if (iseq->arg_rest < 0 && (!proc->is_lambda || iseq->arg_opts == 0)) {
return iseq->argc;
}
else {