Comment # 3 on bug 1138123 from Fuminobu Takeyama

What is the value of G_DEBUG environment variable on your machine?
It seems that ibus-daemon detected a syntax error (this might be a bug) and
just show an error message by g_warning:

https://github.com/ibus/ibus/blob/1.5.20/src/ibuscomposetable.c

If G_DEBUG, which is an option for developers, is set, a glib application will
abort as soon as the function is called.


According to the back trace, the problematic line is:

> <Multi_key> <slash> <slash>      	: "\\"   backslash # REVERSE SOLIDUS

I am not sure this line really has a syntax error, but it seems that IBus does
not allow \\ as far as reading the code.

However, the code was rewritten recently. So this problem might be fixed in the
master branch.