Hallo, It seems that this bug (fixed for Debian Unstable) "PECL extensions FTBFS with PHP Fatal error: Call to a member function getFilelist() on null" now appeared in Debian Stable (Jessie) with the PHP5 security updates, but there missing the fix introduced.
To reproduce try rebuilding the php-apcu 4.0.7-1 source package (in an fully updated Jessie): ... dh_auto_install --destdir=debian/php5-apcu install -d debian/php5-apcu /usr/bin/pear -c debian/pearrc -d download_dir=/tmp -d include_path=/usr/share/php -d php_bin=/usr/bin/php -d bin_dir=/usr/bin -d php_dir=/usr/share/php -d data_dir=/usr/share/php/data -d doc_dir=/usr/share/doc/php5-apcu -d test_dir=/usr/share/php/tests install --offline --nodeps -P /home/haegar/ap/php-apcu-4.0.7/debian/php5-apcu --nobuild ./apcu-4.0.7/package.xml PHP Fatal error: Call to a member function getFilelist() on null in /usr/share/php/PEAR/Command/Install.php on line 747 dh_auto_install: /usr/bin/pear -c debian/pearrc -d download_dir=/tmp -d include_path=/usr/share/php -d php_bin=/usr/bin/php -d bin_dir=/usr/bin -d php_dir=/usr/share/php -d data_dir=/usr/share/php/data -d doc_dir=/usr/share/doc/php5-apcu -d test_dir=/usr/share/php/tests install --offline --nodeps -P /home/haegar/ap/php-apcu-4.0.7/debian/php5-apcu --nobuild ./apcu-4.0.7/package.xml returned exit code 255 debian/rules:9: recipe for target 'override_dh_auto_install' failed ... (jessie32)haegar@corona:~$ dpkg -S /usr/share/php/PEAR/Command/Install.php php-pear: /usr/share/php/PEAR/Command/Install.php (jessie32)haegar@corona:~$ dpkg -l |grep php-pear ii php-pear 5.6.17+dfsg-0+deb8u1 all PEAR - PHP Extension and Application Repository (Not re-opening the bug yet, unsure about the procedure for newly introduced stable bugs) c'ya sven-haegar -- Three may keep a secret, if two of them are dead. - Ben F.