From 4e28d7a5f7d6346acc42a7524dd77fa5f9322029 Mon Sep 17 00:00:00 2001
From: daurnimator <quae@daurnimator.com>
Date: Sun, 17 Nov 2019 02:46:44 +1100
Subject: [PATCH] fix bug on empty error union

---
 src/ir.cpp                     | 1 -
 test/stage1/behavior/error.zig | 4 ++++
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/ir.cpp b/src/ir.cpp
index d50229925c..7bca551852 100644
--- a/src/ir.cpp
+++ b/src/ir.cpp
@@ -8128,7 +8128,6 @@ static ZigType *get_error_set_union(CodeGen *g, ErrorTableEntry **errors, ZigTyp
         }
     }
     assert(index == count);
-    assert(count != 0);
 
     if (type_name == nullptr) {
         buf_appendf(&err_set_type->name, "}");
diff --git a/test/stage1/behavior/error.zig b/test/stage1/behavior/error.zig
index 8ee1b30907..9b7904e9cf 100644
--- a/test/stage1/behavior/error.zig
+++ b/test/stage1/behavior/error.zig
@@ -160,6 +160,10 @@ fn testErrToIntWithOnePossibleValue(
     }
 }
 
+test "empty error union" {
+    const x = error{} || error{};
+}
+
 test "error union peer type resolution" {
     testErrorUnionPeerTypeResolution(1);
 }