From 0b8f19fcba04cde35ca4831f37f8249d51da9432 Mon Sep 17 00:00:00 2001
From: Andrew Kelley <superjoe30@gmail.com>
Date: Thu, 18 Jan 2018 15:08:20 -0500
Subject: [PATCH] fix null debug info for 0-length array type

closes #702
---
 src/analyze.cpp         | 5 ++++-
 test/cases/var_args.zig | 8 ++++++++
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/src/analyze.cpp b/src/analyze.cpp
index 9da848501445587debf9df35a08b50090f8d9cfc..1bdd8bede439890206876cfeef603f94a6056881 100644
--- a/src/analyze.cpp
+++ b/src/analyze.cpp
@@ -609,7 +609,10 @@ TypeTableEntry *get_array_type(CodeGen *g, TypeTableEntry *child_type, uint64_t
     buf_resize(&entry->name, 0);
     buf_appendf(&entry->name, "[%" ZIG_PRI_u64 "]%s", array_size, buf_ptr(&child_type->name));
 
-    if (!entry->zero_bits) {
+    if (entry->zero_bits) {
+        entry->di_type = ZigLLVMCreateDebugArrayType(g->dbuilder, 0,
+                0, child_type->di_type, 0);
+    } else {
         entry->type_ref = child_type->type_ref ? LLVMArrayType(child_type->type_ref,
                 (unsigned int)array_size) : nullptr;
 
diff --git a/test/cases/var_args.zig b/test/cases/var_args.zig
index 7d16106362e7ae3c38328213cb7e9f2cf4e98c7f..aa8b210ad6a45ed5bbfaa681efdab14543928118 100644
--- a/test/cases/var_args.zig
+++ b/test/cases/var_args.zig
@@ -79,3 +79,11 @@ fn assertSlicePtrsEql(args: ...) {
     assert(s1.ptr == s2.ptr);
 }
 
+
+test "pass zero length array to var args param" {
+    doNothingWithFirstArg("");
+}
+
+fn doNothingWithFirstArg(args: ...) {
+    const a = args[0];
+}
-- 
2.54.0