From 569870ca41e73c64d8dc9f1eccfef3529caf2266 Mon Sep 17 00:00:00 2001
From: Mitchell Hashimoto <mitchell.hashimoto@gmail.com>
Date: Tue, 8 Mar 2022 20:44:58 -0800
Subject: stage2: error_set_merged type equality

This implements type equality for error sets. This is done
through element-wise error set comparison.

Inferred error sets are always distinct types and other error sets are
always sorted. See #11022.
---
 src/Sema.zig | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'src/Sema.zig')

diff --git a/src/Sema.zig b/src/Sema.zig
index 195a0ef274..f74fa1e0bf 100644
--- a/src/Sema.zig
+++ b/src/Sema.zig
@@ -2212,6 +2212,10 @@ fn zirErrorSetDecl(
             return sema.fail(block, src, "duplicate error set field {s}", .{name});
         }
     }
+
+    // names must be sorted.
+    Module.ErrorSet.sortNames(&names);
+
     error_set.* = .{
         .owner_decl = new_decl,
         .node_offset = inst_data.src_node,
-- 
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