Merge pull request #272 from luvit/linting-fixes

Adds some nil checks

samples/repl.app/repl.lua

@@ -18,6 +18,8 @@ limitations under the License.
 
 return function (stdin, stdout, uv, utils, greeting)
 
+  local loadstring = loadstring or load
+
   local print = function(...)
     uv.write(stdout, table.concat({...}, "\t") .. "\n")
   end
@@ -67,7 +69,7 @@ return function (stdin, stdout, uv, utils, greeting)
       end
     else
 
-      if err:match "'<eof>'$" then
+      if err and err:match "'<eof>'$" then
         -- Lua expects some more input; stow it away for next time
         buffer = chunk .. '\n'
         return '>>'

samples/repl.app/utils.lua

@@ -1,6 +1,7 @@
 local uv = require('uv')
 local env = require('env')
 
+local unpack = unpack or table.unpack
 local prettyPrint, dump, strip, color, colorize, loadColors
 local theme = {}
 local useColors = false

src/lua/luvibundle.lua

@@ -144,7 +144,7 @@ local function zipBundle(base, zip)
 
   -- Support zips with a single folder inserted at top-level
   local entries = bundle.readdir("")
-  if #entries == 1 and bundle.stat(entries[1]).type == "directory" then
+  if entries and #entries == 1 and bundle.stat(entries[1]).type == "directory" then
     chrootBundle(bundle, entries[1] .. '/')
   end