Since PHP 5.3 flex lexer has been replaced with re2c. Commit
0f9e2b1753 made PHP_PROG_LEX macro still
available for BC.
In commit df6bd506d4 it was updated. Since
this macro is entirely not used in PHP source code anymore from PHP 5.3
and up, this patch removes it together with some old traces of warnings
suppression and comments.
Revert "We cannot safely assume that all op array will be refcount 0 after execution"
This reverts commit b6936adb58.
This change turns out to not have been a clever idea and was causing more weirdness than it helped...