php - empty Symfony's profiler? -

i discovered profiler not working. every time try open profiler /app_dev.php/_profiler/empty/search/results?ip=&limit=10 empty profiler page:

with default , customc onfiguration. here custom one:

framework:     profiler:         dsn: 'file:/tmp/symfony-profiler' 

and here more precise configuration:

framework:     profiler:         dsn: "file:%kernel.root_dir%/../var/cache/%kernel.environment%/profiler" 

no calls stored in theprofiler. no log keep trace of happens under carpet.

symfony needs same file permissions write profiling data logs or cache. symfony write files if dsn left @ default write them var/cache/dev/profiler (or app/var older version).

it's possible profiler service has been overridden, can checked bin/console debug:container profiler , other such tools.