From 4b48fccaddd2f8f840f34779c07ad1fa634d09c5 Mon Sep 17 00:00:00 2001
From: Timon Kruiper <timonkruiper@gmail.com>
Date: Mon, 19 Oct 2020 14:31:43 +0200
Subject: [PATCH] When checking a cache hit, make sure to handle a (re)moved
 source file

When a file cannot be found in the cache, it is not a hit.

Closes #6729
---
 src/Cache.zig | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/Cache.zig b/src/Cache.zig
index 299eb0cfa2..dd96e68d3e 100644
--- a/src/Cache.zig
+++ b/src/Cache.zig
@@ -315,8 +315,9 @@ pub const Manifest = struct {
                 cache_hash_file.path = try self.cache.gpa.dupe(u8, file_path);
             }
 
-            const this_file = fs.cwd().openFile(cache_hash_file.path.?, .{ .read = true }) catch {
-                return error.CacheUnavailable;
+            const this_file = fs.cwd().openFile(cache_hash_file.path.?, .{ .read = true }) catch |err| switch (err) {
+                error.FileNotFound => return false,
+                else => return error.CacheUnavailable,
             };
             defer this_file.close();