On Fri, Feb 5, 2021 at 2:10 PM G. P. B. <george.bany...@gmail.com> wrote:
> Greetings internals, > > While working on rewriting the PHP docs about errors and error handling [1] > I came across a change of behaviour in an edge case of an edge case. > > finally blocks are meant to be always executed regardless that an Exception > has been thrown or not, which it does, however a call to exit() (or die() > as they are aliases). > This can be seen with the following example: https://3v4l.org/6Tger > > However, there is one case where finally blocks are executed when exit() is > used, namely when a generator has a finally block and exit() is called > during its traversal, an example of this in action can be seen here: > https://3v4l.org/HGKHS > > The behaviour of this edge case of an edge case is highly dependent on the > version of PHP where this is run, PHP 5.5, 5.6, 7.0, early version of PHP > 7.1, PHP 7.2.0, PHP 7.2.1, and PHP 8.0 all run the finally block on exit(). > Later versions of PHP 7.1, 7.2.2 and above and PHP 7.3 and 7.4 all skip the > finally block. > > Frankly this is already going to be a mess to document, but this begs the > question is there a "bug" in executing the finally blocks in generators > during a call to exit() or is the "bug" to not execute finally blocks when > exit() is called. > > I've CCed the PHP 8.0 RMs as if the consensus is that skipping finally > blocks after a call to exit() is performed it would be wise to change this > behaviour in PHP 8.0 only and land this ASAP, even though it's a BC break. > > Interested in hearing your thoughts. > > Best regards, > > George P. Banyard > > [1] https://github.com/php/doc-en/pull/320 > Hello again, >From my message from two weeks ago, my understanding is that finally blocks are *never* supposed to be executed on exit(), and that there is indeed a bug (regression) with generators. With PHP 8.0.3RC1 having been released without any reply here from the people CCed, maybe you should open a bug report? -- Guilliam Xavier
