Compdigitec Labs

Run make
-d &> log.txt
and examine the log. Likely there is some prerequisite which is missing, in the form of “File `foo’ does not exist.”

Only letters are directly permitted in macro names, but by using csname to create definitions along with a variable command, we can simulate them.
First, define the macros with numbers using \csname:
Now, create a command which takes in one variable argument, and simply expands it to call the appropriate macro (“xR” + variable) defined above....

See also https://secure.phabricator.com/T4279
For LDAP, the following structure is used:
id - auto-increment

Apparently in some versions of PHP 5.3, calling method_exists() on a class which doesn’t exist seems to cause a crash. The solution, seen here, apparently involves checking class_exists() to prevent a potentially crashing call to method_exists().
This particular bug was causing the administration page of the MathJax-LaTeX WordPress plugin to be blank in the admin interface....