Main issue is probably when copying the content to the file, not during the file creation, but handle both cases just to be sure

core/src/cache.rs

@@ -85,21 +85,23 @@ impl Cache {
             let path = self.file_path(file);
             mkdir_existing(path.parent().unwrap()).unwrap();
 
-            let file_create = File::create(path);
-            match file_create {
-                Ok(mut cache_file) => {
-                    ::std::io::copy(contents, &mut cache_file).unwrap();
-                }
-                Err(_error) => {
-                    ::std::fs::remove_dir_all(&self.root.join("files")).unwrap();
-                    mkdir_existing(&self.root.join("files")).unwrap();
-
-                    let path = self.file_path(file);
-                    mkdir_existing(path.parent().unwrap()).unwrap();
-                    let mut cache_file = File::create(path).unwrap();
-                    ::std::io::copy(contents, &mut cache_file).unwrap();
-                }
-            };
+            let mut cache_file = File::create(path).unwrap_or_else(|_e| {
+                ::std::fs::remove_dir_all(&self.root.join("files")).unwrap();
+                mkdir_existing(&self.root.join("files")).unwrap();
+
+                let path = self.file_path(file);
+                mkdir_existing(path.parent().unwrap()).unwrap();
+                File::create(path).unwrap()
+            });
+            ::std::io::copy(contents, &mut cache_file).unwrap_or_else(|_e| {
+                ::std::fs::remove_dir_all(&self.root.join("files")).unwrap();
+                mkdir_existing(&self.root.join("files")).unwrap();
+
+                let path = self.file_path(file);
+                mkdir_existing(path.parent().unwrap()).unwrap();
+                let mut file = File::create(path).unwrap();
+                ::std::io::copy(contents, &mut file).unwrap()
+            });
         }
     }
 }