From 0fa89dc51d6bb92f36ceb1399e07aa6f7c1dbd2b Mon Sep 17 00:00:00 2001
From: LeRoyce Pearson <leroycepearson@geemili.xyz>
Date: Thu, 30 Apr 2020 17:04:13 -0600
Subject: [PATCH] Fix read from null pointer in CacheHash.hit

It occured when the manifest file was manually edited to include an extra
file. Now it will simply copy the file name in the manifest file
---
 lib/std/cache_hash.zig | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/lib/std/cache_hash.zig b/lib/std/cache_hash.zig
index 6b3d6d7ba2..aa7ae6896d 100644
--- a/lib/std/cache_hash.zig
+++ b/lib/std/cache_hash.zig
@@ -186,6 +186,10 @@ pub const CacheHash = struct {
                 return error.InvalidFormat;
             }
 
+            if (cache_hash_file.path == null) {
+                cache_hash_file.path = try mem.dupe(self.alloc, u8, file_path);
+            }
+
             const this_file = fs.cwd().openFile(cache_hash_file.path.?, .{ .read = true }) catch {
                 return error.CacheUnavailable;
             };