Remove `patch_irep()` in `mruby-eval`

- It can now deal with operands in the range of `OP_EXT*`.
- It can now call the same method as the variable name without arguments.

  ```ruby
  def a
    "Safe!"
  end

  a = "Auto!"

  eval "a()" # call method `a`
  ```

1 files changed, 14 insertions, 1 deletions

diff --git a/mrbgems/mruby-compiler/core/parse.y b/mrbgems/mruby-compiler/core/parse.y
index 7280390a7..123c6c0c2 100644
--- a/mrbgems/mruby-compiler/core/parse.y
+++ b/mrbgems/mruby-compiler/core/parse.y
@@ -265,6 +265,7 @@ local_unnest(parser_state *p)
 static mrb_bool
 local_var_p(parser_state *p, mrb_sym sym)
 {
+  struct RProc *u;
   node *l = p->locals;
 
   while (l) {
@@ -275,6 +276,18 @@ local_var_p(parser_state *p, mrb_sym sym)
     }
     l = l->cdr;
   }
+
+  u = p->upper;
+  while (u && !MRB_PROC_CFUNC_P(u)) {
+    struct mrb_irep *ir = u->body.irep;
+    uint_fast16_t n = ir->nlocals;
+    const struct mrb_locals *v = ir->lv;
+    for (; n > 1; n --, v ++) {
+      if (v->name == sym) return TRUE;
+    }
+    if (MRB_PROC_SCOPE_P(u)) break;
+    u = u->upper;
+  }
   return FALSE;
 }
 
@@ -6192,7 +6205,7 @@ parser_init_cxt(parser_state *p, mrbc_context *cxt)
   }
   p->capture_errors = cxt->capture_errors;
   p->no_optimize = cxt->no_optimize;
-  p->on_eval = cxt->on_eval;
+  p->upper = cxt->upper;
   if (cxt->partial_hook) {
     p->cxt = cxt;
   }