Noteworthy changes in release 2.6.11 (2026-11-12) [stable]

scanner

• A C++ scanner now frees every buffer left on its buffer stack when
  it is destroyed. Before, it freed only the top one, so each buffer
  added with yypush_buffer_state() and not yet removed leaked its
  memory. The C scanners already did this in yylex_destroy().

  Thanks to anshal ossaimi.

test

• The scan_length tests could fail on some architectures, such as
  aarch64, because two variables in each test could hold wrong values
  after the test recovered from the expected fatal error. They are
  now declared so that the compiler cannot do that. (#850)

  Thanks to Funda Wang.