Check MySQL case-insensitive query or table name

I tried to install Umbrao CMS, it supports MySQL database but it need MySQL to support case-insensitive query and table name.


Following is way to check whether case-insensitive query is supported:

show variables where variable_name=’lower_case_table_names’;

or check lower_case_table_names option in my.ini (MySQL configuration file)


If this option’s value is set to 1, then case-insensitive query and table name is supported.

QWebEngine crash with exception code 0x80000003

QWebEngine is a new web browser engine introduced in Qt 5.4, it’s used to replace the old QWebView. QWebView is based on WebKit, while QWebEngine is based on Chromium browser, so it’s faster and supports more features.

I wrote a very simple program to test QWebEngine, following is the code:

Compiling and running is smooth. But when I tried to run thisĀ demo on another machine, it crashed, and an error dialog is shown with the message “An unknown software exception (0x80000003) has occurred at 0x023c5b7e. Click OK to terminate the program.

By chekcing the log file (debug.log) I foundĀ some helpful information:

[] Couldn’t mmap D:\Qt\Qt5.4.0\5.4\msvc2013_64\icudtl.dat
[] Check failed: base::i18n::InitializeICU()

We can see the icudtl.dat path is not correct, because it doesn’t exist at all.

To fix it we need to create a new file named “qt.conf” under the application directory, and fill it with following content:


(This bug is posted at