From 8058b5e0a92e4eac05ba19aabed1fc041353c69b Mon Sep 17 00:00:00 2001
From: Andrew Kelley <superjoe30@gmail.com>
Date: Tue, 2 Feb 2016 19:09:53 -0700
Subject: fix crash when incomplete struct used as argument

closes #107
---
 src/codegen.cpp | 1 +
 1 file changed, 1 insertion(+)

(limited to 'src/codegen.cpp')

diff --git a/src/codegen.cpp b/src/codegen.cpp
index c68632100a..abcfbd0965 100644
--- a/src/codegen.cpp
+++ b/src/codegen.cpp
@@ -2830,6 +2830,7 @@ static void do_code_gen(CodeGen *g) {
                     arg_no = var->gen_arg_index + 1;
 
                     var->is_ptr = false;
+                    assert(var->gen_arg_index >= 0);
                     var->value_ref = LLVMGetParam(fn, var->gen_arg_index);
                 } else {
                     tag = LLVMZigTag_DW_auto_variable();
-- 
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