User-provided unknown configure option raises an error

1 files changed, 6 insertions, 0 deletions

diff --git a/src/lanes.lua b/src/lanes.lua
index 15908fa..bc47453 100644
--- a/src/lanes.lua
+++ b/src/lanes.lua
@@ -115,6 +115,12 @@ lanes.configure = function( settings_)
                 if type( settings_) ~= "table" then
                         error "Bad parameter #1 to lanes.configure(), should be a table"
                 end
+                -- any setting unknown to Lanes raises an error
+                for setting, _ in pairs( settings_) do
+                        if not param_checkers[setting] then
+                        error( "Unknown parameter '" .. setting .. "' in configure options")
+                        end
+                end
                 -- any setting not present in the provided parameters takes the default value
                 for key, checker in pairs( param_checkers) do
                         local my_param = settings_[key]