Be stricter in type check to catch errors such as #90. Closes #90.

This does not affect any rocks in the repos; they all validate properly with
this stricter check.

2 files changed, 4 insertions, 2 deletions

diff --git a/src/luarocks/build.lua b/src/luarocks/build.lua
index 42ae3fd7..e9b3adc1 100644
--- a/src/luarocks/build.lua
+++ b/src/luarocks/build.lua
@@ -223,6 +223,8 @@ function build_rockspec(rockspec_file, need_to_fetch, minimal_mode, no_deps)
          local dest = dir.path(path.install_dir(name, version), copy_dir)
          fs.make_dir(dest)
          fs.copy_contents(copy_dir, dest)
+      else
+         util.warning("Directory '"..copy_dir.."' not found")
       end
    end
 
diff --git a/src/luarocks/type_check.lua b/src/luarocks/type_check.lua
index 282198f6..28e6e7b9 100644
--- a/src/luarocks/type_check.lua
+++ b/src/luarocks/type_check.lua
@@ -172,8 +172,8 @@ local function type_check_item(name, item, expected, context)
          return nil, "Type mismatch on field "..context..name..": expected a number"
       end
    elseif expected_type == "string" then
-      if not tostring(item) then
-         return nil, "Type mismatch on field "..context..name..": expected a value convertible to string"
+      if type(item) ~= "string" then
+         return nil, "Type mismatch on field "..context..name..": expected a string"
       end
       if expected ~= "string" then
          if not item:match("^"..expected.."$") then