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, 0 insertions, 6 deletions

diff --git a/vm_core.h b/vm_core.h
index 25629d3789..f3e5a04f72 100644
--- a/vm_core.h
+++ b/vm_core.h
@@ -1550,12 +1550,6 @@ vm_block_handler_verify(MAYBE_UNUSED(VALUE block_handler))
               (vm_block_handler_type(block_handler), 1));
 }
 
-static inline int
-vm_cfp_forwarded_bh_p(const rb_control_frame_t *cfp, VALUE block_handler)
-{
-    return ((VALUE) cfp->block_code) == block_handler;
-}
-
 static inline enum rb_block_type
 vm_block_type(const struct rb_block *block)
 {