The following snippet demonstrates the problem:

--- snip ---
// comment \

#include <something.h>
...

class Foo
{
    ...
};
--- snap ---

If there are >=9 empty/preprocessor lines, the preprocessed source
becomes
// comment \
# 12 "file.cpp"
...

The lexer considers the line marker as a continued C++ comment, and
highlighting is broken

Change-Id: I30a2fc7d19b279316e9273697179c90d81099573
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>