From f02bf516cf2d779b6d6075be4517a7f99a7aea5a Mon Sep 17 00:00:00 2001
From: overlookmotel <557937+overlookmotel@users.noreply.github.com>
Date: Mon, 23 Sep 2024 18:05:31 +0000
Subject: [PATCH] refactor(transformer): arrow function transform: remove
 unnecessary assertion (#6002)

This assertion was required previously for soundness, but now `SparseStack::pop` makes it impossible for `self.this_var_stack.len()` to be 0. Being exactly 1 is not a safety invariant, only that it's not 0.
---
 crates/oxc_transformer/src/es2015/arrow_functions.rs | 1 -
 1 file changed, 1 deletion(-)

diff --git a/crates/oxc_transformer/src/es2015/arrow_functions.rs b/crates/oxc_transformer/src/es2015/arrow_functions.rs
index bb2079d22..d3f2d20a1 100644
--- a/crates/oxc_transformer/src/es2015/arrow_functions.rs
+++ b/crates/oxc_transformer/src/es2015/arrow_functions.rs
@@ -165,7 +165,6 @@ impl<'a> Traverse<'a> for ArrowFunctions<'a> {
 
     /// Insert `var _this = this;` for the global scope.
     fn exit_program(&mut self, program: &mut Program<'a>, _ctx: &mut TraverseCtx<'a>) {
-        assert!(self.this_var_stack.len() == 1);
         if let Some(this_var) = self.this_var_stack.take() {
             self.insert_this_var_statement_at_the_top_of_statements(&mut program.body, &this_var);
         }