From 72ef60c8c2f8ec8098e2ccdf6256c1b29e0e5915 Mon Sep 17 00:00:00 2001
From: Aaron Winter <winter.aaron93@gmail.com>
Date: Sun, 27 Nov 2022 04:53:44 +0100
Subject: [PATCH] ecs: fix segfault in Entities.deinit (#629)

Co-authored-by: Aaron Winter <wintera@Aarons-MacBook-Pro.local>
---
 libs/ecs/src/entities.zig | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/libs/ecs/src/entities.zig b/libs/ecs/src/entities.zig
index 69e6bb80..251c0718 100644
--- a/libs/ecs/src/entities.zig
+++ b/libs/ecs/src/entities.zig
@@ -470,7 +470,7 @@ pub fn Entities(comptime all_components: anytype) type {
                 .len = 0,
                 .capacity = 0,
                 .columns = columns,
-                .block = undefined,
+                .block = &[_]u8{},
                 .hash = void_archetype_hash,
             });
 
@@ -587,7 +587,7 @@ pub fn Entities(comptime all_components: anytype) type {
                     .len = 0,
                     .capacity = 0,
                     .columns = columns,
-                    .block = undefined,
+                    .block = &[_]u8{},
                     .hash = undefined,
                 };
 
@@ -715,7 +715,7 @@ pub fn Entities(comptime all_components: anytype) type {
                     .len = 0,
                     .capacity = 0,
                     .columns = columns,
-                    .block = undefined,
+                    .block = &[_]u8{},
                     .hash = undefined,
                 };
 
@@ -867,3 +867,11 @@ test "example" {
     // Remove an entity whenever you wish. Just be sure not to try and use it later!
     try world.remove(player1);
 }
+
+test "empty_world" {
+    const allocator = testing.allocator;
+    //-------------------------------------------------------------------------
+    var world = try Entities(.{}).init(allocator);
+    // Create a world.
+    defer world.deinit();
+}
\ No newline at end of file