remove VM_ENV_DATA_INDEX_ENV_PROC.

* vm_core.h (VM_ENV_DATA_INDEX_ENV_PROC): ep[VM_ENV_DATA_INDEX_ENV_PROC] is
  allocated to mark a Proc which is created from iseq block.
  However, `lep[0]` keeps Proc object itself as a block handler (Proc).
  So we don't need to keep it.

* vm_core.h (VM_ENV_PROCVAL): ditto.

* vm.c (vm_make_env_each): do not need to keep blockprocval as special value.

* vm.c (vm_block_handler_escape): simply return Proc value.

* proc.c (proc_new):  we don't need to check Env because a Proc type block
  handler is a Proc object itself.
  [Bug #14782]

* test/ruby/test_proc.rb: add a test for [Bug #14782]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@63494 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

proc.c

@@ -706,13 +706,6 @@ proc_new(VALUE klass, int8_t is_lambda)
 	cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(cfp);
 
 	if ((block_handler = rb_vm_frame_block_handler(cfp)) != VM_BLOCK_HANDLER_NONE) {
-	    const VALUE *lep = rb_vm_ep_local_ep(cfp->ep);
-
-	    if (VM_ENV_ESCAPED_P(lep)) {
-		procval = VM_ENV_PROCVAL(lep);
-		goto return_existing_proc;
-	    }
-
 	    if (is_lambda) {
 		rb_warn(proc_without_block);
 	    }
@@ -730,7 +723,6 @@ proc_new(VALUE klass, int8_t is_lambda)
       case block_handler_type_proc:
 	procval = VM_BH_TO_PROC(block_handler);
 
-      return_existing_proc:
 	if (RBASIC_CLASS(procval) == klass) {
 	    return procval;
 	}

test/ruby/test_proc.rb

@@ -1408,4 +1408,12 @@ class TestProc < Test::Unit::TestCase
       m {}
     end;
   end
+
+  def method_for_test_proc_without_block_for_symbol
+    binding.eval('proc')
+  end
+
+  def test_proc_without_block_for_symbol
+    assert_equal('1', method_for_test_proc_without_block_for_symbol(&:to_s).call(1), '[Bug #14782]')
+  end
 end

vm.c

@@ -634,28 +634,25 @@ check_env_value(const rb_env_t *env)
     return Qnil;		/* unreachable */
 }
 
-static void
-vm_block_handler_escape(const rb_execution_context_t *ec, VALUE block_handler, VALUE *procvalptr)
+static VALUE
+vm_block_handler_escape(const rb_execution_context_t *ec, VALUE block_handler)
 {
     switch (vm_block_handler_type(block_handler)) {
       case block_handler_type_ifunc:
       case block_handler_type_iseq:
-	*procvalptr = rb_vm_make_proc(ec, VM_BH_TO_CAPT_BLOCK(block_handler), rb_cProc);
-	return;
+        return  rb_vm_make_proc(ec, VM_BH_TO_CAPT_BLOCK(block_handler), rb_cProc);
 
       case block_handler_type_symbol:
       case block_handler_type_proc:
-	*procvalptr = block_handler;
-	return;
+        return block_handler;
     }
     VM_UNREACHABLE(vm_block_handler_escape);
-    return;
+    return Qnil;
 }
 
 static VALUE
 vm_make_env_each(const rb_execution_context_t * const ec, rb_control_frame_t *const cfp)
 {
-    VALUE blockprocval = Qfalse;
     const VALUE * const ep = cfp->ep;
     const rb_env_t *env;
     const rb_iseq_t *env_iseq;
@@ -685,7 +682,7 @@ vm_make_env_each(const rb_execution_context_t * const ec, rb_control_frame_t *co
 	VALUE block_handler = VM_ENV_BLOCK_HANDLER(ep);
 
 	if (block_handler != VM_BLOCK_HANDLER_NONE) {
-	    vm_block_handler_escape(ec, block_handler, &blockprocval);
+            VALUE blockprocval = vm_block_handler_escape(ec, block_handler);
 	    VM_STACK_ENV_WRITE(ep, VM_ENV_DATA_INDEX_SPECVAL, blockprocval);
 	}
     }
@@ -710,8 +707,7 @@ vm_make_env_each(const rb_execution_context_t * const ec, rb_control_frame_t *co
      */
 
     env_size = local_size +
-	       1 /* envval */ +
-	       (blockprocval ? 1 : 0) /* blockprocval */;
+	       1 /* envval */;
     env_body = ALLOC_N(VALUE, env_size);
     MEMCPY(env_body, ep - (local_size - 1 /* specval */), VALUE, local_size);
 
@@ -729,7 +725,6 @@ vm_make_env_each(const rb_execution_context_t * const ec, rb_control_frame_t *co
 
     env = vm_env_new(env_ep, env_body, env_size, env_iseq);
 
-    if (blockprocval) RB_OBJ_WRITE(env, &env_ep[2], blockprocval);
     cfp->ep = env_ep;
     VM_ENV_FLAGS_SET(env_ep, VM_ENV_FLAG_ESCAPED | VM_ENV_FLAG_WB_REQUIRED);
     VM_STACK_ENV_WRITE(ep, 0, (VALUE)env);		/* GC mark */

vm_core.h

@@ -1084,7 +1084,6 @@ enum {
 #define VM_ENV_DATA_INDEX_SPECVAL    (-1) /* ep[-1] */
 #define VM_ENV_DATA_INDEX_FLAGS      ( 0) /* ep[ 0] */
 #define VM_ENV_DATA_INDEX_ENV        ( 1) /* ep[ 1] */
-#define VM_ENV_DATA_INDEX_ENV_PROC   ( 2) /* ep[ 2] */
 
 #define VM_ENV_INDEX_LAST_LVAR              (-VM_ENV_DATA_SIZE)
 
@@ -1223,16 +1222,6 @@ VM_ENV_ENVVAL_PTR(const VALUE *ep)
     return (const rb_env_t *)VM_ENV_ENVVAL(ep);
 }
 
-static inline VALUE
-VM_ENV_PROCVAL(const VALUE *ep)
-{
-    VM_ASSERT(VM_ENV_ESCAPED_P(ep));
-    VM_ASSERT(VM_ENV_LOCAL_P(ep));
-    VM_ASSERT(VM_ENV_BLOCK_HANDLER(ep) != VM_BLOCK_HANDLER_NONE);
-
-    return ep[VM_ENV_DATA_INDEX_ENV_PROC];
-}
-
 static inline const rb_env_t *
 vm_env_new(VALUE *env_ep, VALUE *env_body, unsigned int env_size, const rb_iseq_t *iseq)
 {