From 1cc8954747f95c53b0e9c19185a7f73414826548 Mon Sep 17 00:00:00 2001
From: David Wendt <dcrkid@yahoo.com>
Date: Thu, 5 Mar 2020 21:11:04 -0500
Subject: [PATCH] Impl `pop`, which is the opposite of `dup`; and also the
 opposite of all the `push` instructions.

Confusingly, this one isn't documented in the AVM2 spec at all, but it's method of operation is fairly obvious.
---
 core/src/avm2.rs | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/core/src/avm2.rs b/core/src/avm2.rs
index c01d17332..f715fe91e 100644
--- a/core/src/avm2.rs
+++ b/core/src/avm2.rs
@@ -439,6 +439,7 @@ impl<'gc> Avm2<'gc> {
                 Op::PushTrue => self.op_push_true(),
                 Op::PushUint { value } => self.op_push_uint(value),
                 Op::PushUndefined => self.op_push_undefined(),
+                Op::Pop => self.op_pop(),
                 Op::Dup => self.op_dup(),
                 Op::GetLocal { index } => self.op_get_local(index),
                 Op::SetLocal { index } => self.op_set_local(context, index),
@@ -580,6 +581,12 @@ impl<'gc> Avm2<'gc> {
         Ok(())
     }
 
+    fn op_pop(&mut self) -> Result<(), Error> {
+        self.pop();
+
+        Ok(())
+    }
+
     fn op_dup(&mut self) -> Result<(), Error> {
         self.push(self.stack.last().cloned().unwrap_or(Value::Undefined));