From 03b6d9f547417e1f56f5dfb5079f7aa2dee832a6 Mon Sep 17 00:00:00 2001
From: Andrew Kelley <superjoe30@gmail.com>
Date: Tue, 28 Feb 2017 03:32:12 -0500
Subject: [PATCH] fix assertion failure for some switch errors

---
 src/ir.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/ir.cpp b/src/ir.cpp
index 6fbea22b09..fb1670fe82 100644
--- a/src/ir.cpp
+++ b/src/ir.cpp
@@ -10233,6 +10233,8 @@ static TypeTableEntry *ir_analyze_instruction_switch_br(IrAnalyze *ira,
 
     for (size_t i = 0; i < case_count; i += 1) {
         IrInstructionSwitchBrCase *new_case = &cases[i];
+        if (new_case->value == ira->codegen->invalid_instruction)
+            return ir_unreach_error(ira);
         new_case->block->ref_instruction = &switch_br_instruction->base;
     }