Some minor fixes.

src/main/resources/assets/opencomputers/loot/OpenOS/lib/process.lua

@@ -43,7 +43,12 @@ function process.load(path, env, init, name)
       reason = "no exec command"
     else
       code = function()
-        return require("shell").execute(command, env, path)
+        local result = table.pack(require("shell").execute(command, env, path))
+        if not result[1] then
+          error(result[2], 0)
+        else
+          return table.unpack(result, 1, result.n)
+        end
       end
     end
   else

src/main/scala/li/cil/oc/server/fs/Buffered.scala

@@ -1,6 +1,7 @@
 package li.cil.oc.server.fs
 
 import java.io
+import java.io.FileNotFoundException
 
 import li.cil.oc.api.fs.Mode
 import net.minecraft.nbt.NBTTagCompound
@@ -45,6 +46,7 @@ trait Buffered extends OutputStreamFileSystem {
         else if (!exists(childPath) || !isDirectory(childPath)) {
           openOutputHandle(0, childPath, Mode.Write) match {
             case Some(stream) =>
+              try {
                 val in = new io.FileInputStream(childFile)
                 val buffer = new Array[Byte](8 * 1024)
                 var read = 0
@@ -56,6 +58,10 @@ trait Buffered extends OutputStreamFileSystem {
                   }
                 } while (read >= 0)
                 in.close()
+              }
+              catch {
+                case _: FileNotFoundException => // File got deleted in the meantime.
+              }
               stream.close()
               setLastModified(childPath, childFile.lastModified())
             case _ => // File is open for writing.