From 3fd9209715e801f6eeb9143a7513917384949544 Mon Sep 17 00:00:00 2001
From: Max Bernstein <max@bernsteinbear.com>
Date: Tue, 28 Nov 2023 16:38:42 -0500
Subject: [PATCH] Bail out in some tests

---
 runtime/bytecode.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/runtime/bytecode.cpp b/runtime/bytecode.cpp
index 62c0d4219..fcc94df37 100644
--- a/runtime/bytecode.cpp
+++ b/runtime/bytecode.cpp
@@ -406,6 +406,10 @@ static void analyzeDefiniteAssignment(Thread* thread,
     // I don't want to deal with the block stack (yet?).
     return;
   }
+  if (num_opcodes == 0) {
+    // Some tests generate empty code objects. Bail out.
+    return;
+  }
   // Lattice definition
   uword top = kMaxUword;
   auto meet = [](uword left, uword right) { return left & right; };