* PHP-7.2:
  Fix #78656: Parse errors classified as highest log-level

This makes the stream opening actually fail, and avoids assertion
failures when we tokenize with EG(exception) set.

Also avoid throwing an additional warning after an exception has
already been thrown.

* PHP-7.2:
  Fix #76859 stream_get_line skips data if used with data-generating filter

stream_get-line repeatedly calls php_stream_fill_read_buffer until
enough data is accumulated in buffer. However, when stream contains
filters attached to it, then each call to fill buffer essentially
resets buffer read/write pointers and new data is written over old.
This causes stream_get_line to skip parts of data from stream
This patch fixes such behavior, so fill buffer call will append.