Make Kernel#lambda raise when given non-literal block

Previously, Kernel#lambda returned a non-lambda proc when given a
non-literal block and issued a warning under the `:deprecated` category.
With this change, Kernel#lambda will always return a lambda proc, if it
returns without raising.

Due to interactions with block passing optimizations, we previously had
two separate code paths for detecting whether Kernel#lambda got a
literal block. This change allows us to remove one path, the hack done
with rb_control_frame_t::block_code introduced in 85a337f for supporting
situations where Kernel#lambda returned a non-lambda proc.

[Feature #19777]

Co-authored-by: Takashi Kokubun <takashikkbn@gmail.com>

1 files changed, 5 insertions, 3 deletions

diff --git a/spec/ruby/core/proc/lambda_spec.rb b/spec/ruby/core/proc/lambda_spec.rb
index b2d3f50350..5c3c38fc2a 100644
--- a/spec/ruby/core/proc/lambda_spec.rb
+++ b/spec/ruby/core/proc/lambda_spec.rb
@@ -14,9 +14,11 @@ describe "Proc#lambda?" do
     Proc.new {}.lambda?.should be_false
   end
 
-  it "is preserved when passing a Proc with & to the lambda keyword" do
-    suppress_warning {lambda(&->{})}.lambda?.should be_true
-    suppress_warning {lambda(&proc{})}.lambda?.should be_false
+  ruby_version_is ""..."3.3" do
+    it "is preserved when passing a Proc with & to the lambda keyword" do
+      suppress_warning {lambda(&->{})}.lambda?.should be_true
+      suppress_warning {lambda(&proc{})}.lambda?.should be_false
+    end
   end
 
   it "is preserved when passing a Proc with & to the proc keyword" do