From 26dfbf8122618de865e847bed18554f6b023198a Mon Sep 17 00:00:00 2001
From: Veikka Tuominen <git@vexu.eu>
Date: Fri, 25 Mar 2022 12:13:06 +0200
Subject: [PATCH] type: fix onePossibleValue for auto numbered enums

---
 src/type.zig | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/type.zig b/src/type.zig
index d5b8e6f5b3..17c8d4d111 100644
--- a/src/type.zig
+++ b/src/type.zig
@@ -4511,7 +4511,11 @@ pub const Type = extern union {
             .enum_full => {
                 const enum_full = ty.castTag(.enum_full).?.data;
                 if (enum_full.fields.count() == 1) {
-                    return enum_full.values.keys()[0];
+                    if (enum_full.values.count() == 0) {
+                        return Value.zero;
+                    } else {
+                        return enum_full.values.keys()[0];
+                    }
                 } else {
                     return null;
                 }