From 59ca512ec8f099a7d4c8aa4392f939d1aa5aee5d Mon Sep 17 00:00:00 2001
From: Rose Hogenson <rhogenson@posteo.net>
Date: Sat, 27 Aug 2022 19:30:16 -0700
Subject: Implement multiple return values.

---
 bytecode/src/encoding.rs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'bytecode/src/encoding.rs')

diff --git a/bytecode/src/encoding.rs b/bytecode/src/encoding.rs
index 44fff51..a4e159f 100644
--- a/bytecode/src/encoding.rs
+++ b/bytecode/src/encoding.rs
@@ -119,8 +119,9 @@ fn op_decoding<T: Read>(prog: &mut T) -> Result<Option<Op>, String> {
             read_arg(prog, arg2_const)?,
         ),
         19 => Op::Len(read_local(prog)?, read_arg(prog, arg1_const)?),
+        20 => Op::AssertSingleton(read_local(prog)?, read_arg(prog, arg1_const)?),
         _ => {
-            return Err(String::from("invalid opcode"));
+            return Err(format!("invalid opcode {tag}"));
         }
     };
     Ok(Some(op))
-- 
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