From 8c996fb15d898eb218cad818032dced84e31e217 Mon Sep 17 00:00:00 2001
From: gluax <jonathan.t.pavlik@gmail.com>
Date: Tue, 23 Mar 2021 16:02:01 -0400
Subject: [PATCH] do not allow _ at start of identifier

---
 parser/src/parser/context.rs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/parser/src/parser/context.rs b/parser/src/parser/context.rs
index 1c3f41f53e..38fedc74a8 100644
--- a/parser/src/parser/context.rs
+++ b/parser/src/parser/context.rs
@@ -302,6 +302,10 @@ impl ParserContext {
                     span,
                 } = token
                 {
+                    if name.starts_with('_') {
+                        return Err(SyntaxError::invalid_ident_name(&name, &name[1..name.len()], &span));
+                    }
+
                     Ok(Identifier { name, span })
                 } else {
                     unimplemented!()