Formally we have regression in 5 projects (and in all complex test bases).

For example regression in Loki (7 invalid identifiers instead of 5):
> loki-0.1.7/include/loki/Visitor.h 267 Unable to resolve identifier Visit.
> loki-0.1.7/include/loki/Visitor.h 288 Unable to resolve identifier Visit.

Also I investigated 1 of complex test bases. Formally we have regression in C99 files. In old builds:
  ...
  complex_code;// some complex code breaks parser
  other_coder; // unexpected token
  if (...)     // unexpected token
      return;  // ok
  if (...)     // unexpected token
      return;  // ok
}              // ok

In new builds:
  ...
  complex_code;// some complex code breaks parser
  other_coder; // unexpected token
  if (...)     // unexpected token
      return;  // unexpected token: return
  if (...)     // unexpected token
      return;  // unexpected token: return
}              // unexpected token: }