Description:
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I've been using php-ssh2 on Arch Linux from within Wordpress, which lets you update over ssh/sftp like this: define('FS_METHOD','ssh2');

The AUR package is here: https://aur.archlinux.org/packages/php-ssh

Version 0.12 of this package does not work at all - it segfaults every time. Reverting the PKGBUILD 0.11.3 and rebuilding against current PHP versions does work.

Doing a git bisect, I've narrowed down the problematic commit to this: https://git.php.net/?p=pecl/networking/ssh2.git;a=commitdiff;h=8d73279c

I'm not a C or PHP expert. I don't know why this commit breaks it, but I do know that reverting it makes master/head work again, as demonstrated here: https://github.com/yardenac/php-ssh2/commit/ddaa6a08

An updated PKGBUILD for Arch also demonstrates this fix: https://github.com/yardenac/pkgbuilds/tree/master/packages/php-ssh-git

I understand 8d73279c was itself a bugfix (to recognize files with "#" in their path), so the best solution will take further examination.