Change Details

**Steps to replicate the issue** (include links if applicable): * The error message on line 792 of mw.lua refers to the undeclared variable `arg`, instead of `module`. **What happens?**: * Inputting an invalid data type (such as a table) always results in the error message `bad argument #1 to 'mw.loadJsonData' (string expected, got nil)`, even when the input is not `nil`, because `arg` is an undeclared global variable. **What should have happened instead?**: * The error message should display the correct type. For example, if the input is a table, the error should be `bad argument #1 to 'mw.loadJsonData' (string expected, got table)`. **Software version** (on `Special:Version` page; skip for WMF-hosted wikis like Wikipedia): **Other information** (browser name/version, screenshots, etc.):

**Steps to replicate the issue** (include links if applicable): * The error message in the function `mw.loadJsonData` on line 792 of `mw.lua` refers to the undeclared variable `arg`, instead of `module`. **What happens?**: * Inputting an invalid data type (such as a table) always results in the error message `bad argument #1 to 'mw.loadJsonData' (string expected, got nil)`, even when the input is not `nil`, because `arg` is an undeclared global variable. **What should have happened instead?**: * The error message should display the correct type. For example, if the input is a table, the error should be `bad argument #1 to 'mw.loadJsonData' (string expected, got table)`. **Software version** (on `Special:Version` page; skip for WMF-hosted wikis like Wikipedia): **Other information** (browser name/version, screenshots, etc.):

**Steps to replicate the issue** (include links if applicable): * The error message in the function `mw.loadJsonData` on line 792 of `mw.lua` refers to the undeclared variable `arg`, instead of `module`. **What happens?**: * Inputting an invalid data type (such as a table) always results in the error message `bad argument #1 to 'mw.loadJsonData' (string expected, got nil)`, even when the input is not `nil`, because `arg` is an undeclared global variable. **What should have happened instead?**: * The error message should display the correct type. For example, if the input is a table, the error should be `bad argument #1 to 'mw.loadJsonData' (string expected, got table)`. **Software version** (on `Special:Version` page; skip for WMF-hosted wikis like Wikipedia): **Other information** (browser name/version, screenshots, etc.):