mod_fcgid: error reading data from FastCGI server

$ echo '<?="hello world\n"?>' > test.php
$ export PHPRC=/var/www/web30/conf/php5/
$ php-cgi  test.php; echo $?
255
$ export PHPRC=/etc/php5/cgi/
$ php-cgi  test.php; echo $?
X-Powered-By: PHP/5.4.4-14+deb7u5
Content-type: text/html


test
0
$

;  _    _          ___           __ _     (R)
; | |  (_)_ _____ / __|___ _ _  / _(_)__ _
; | |__| \ V / -_) (__/ _ \ ' \|  _| / _` |
; |____|_|\_/\___|\___\___/_||_|_| |_\__, |
;                                    |___/
; Copyright (c) 2009-2013 Keppler IT GmbH.
; ----------------------------------------------------------------------------
; DO NOT MODIFY - ANY CHANGES WILL BE OVERWRITTEN!
; Last updated at: 2013-10-17 18:30:08 CEST
; ----------------------------------------------------------------------------


[code=php]
engine = On
short_open_tag = On
asp_tags = Off
precision = 14
output_buffering = 4096
zlib.output_compression = Off
implicit_flush = Off
unserialize_callback_func =
serialize_precision = 17
disable_functions = "show_source, highlight_file, apache_child_terminate, apache_get_modules, apache_note, apache_setenv, virtual, dl, diskfreespace, disk_free_space, disk_total_space, posix_getpwnam, posix_getpwuid, posix_mkfifo, posix_mknod, posix_setpgid, posix_setsid, posix_setuid, posix_uname, proc_nice, openlog, syslog, pfsockopen"
disable_classes =
zend.enable_gc = On
expose_php = Off
max_execution_time = 30
max_input_time = 60
memory_limit = 64M
error_reporting = E_ALL & ~E_DEPRECATED & ~E_STRICT
display_errors = Off
display_startup_errors = Off
log_errors = Off
log_errors_max_len = 1024
ignore_repeated_errors = Off
ignore_repeated_source = Off
report_memleaks = On
track_errors = Off
html_errors = On
variables_order = "GPCS"
request_order = "GP"
register_argc_argv = Off
auto_globals_jit = On
post_max_size = 16M
auto_prepend_file =
auto_append_file =
default_mimetype = "text/html"
doc_root =
user_dir =
enable_dl = Off
file_uploads = On
upload_max_filesize = 16M
max_file_uploads = 20
allow_url_fopen = On
allow_url_include = Off
default_socket_timeout = 60
magic_quotes_gpc = On
safe_mode = Off
register_globals = Off
error_log = "/var/www/web30/logs/priv/php_errors.log"
upload_tmp_dir = "/var/www/web30/tmp"
[CLI Server]
cli_server.color = On
[Date]
[filter]
[iconv]
[intl]
[sqlite]
[sqlite3]
[Pcre]
[Pdo]
[Pdo_mysql]
pdo_mysql.cache_size = 2000
pdo_mysql.default_socket=
[Phar]
[mail function]
SMTP = localhost
smtp_port = 25
mail.add_x_header = On
[SQL]
sql.safe_mode = Off
[ODBC]
odbc.allow_persistent = On
odbc.check_persistent = On
odbc.max_persistent = -1
odbc.max_links = -1
odbc.defaultlrl = 4096
odbc.defaultbinmode = 1
[Interbase]
ibase.allow_persistent = 1
ibase.max_persistent = -1
ibase.max_links = -1
ibase.timestampformat = "%Y-%m-%d %H:%M:%S"
ibase.dateformat = "%Y-%m-%d"
ibase.timeformat = "%H:%M:%S"
[MySQL]
mysql.allow_local_infile = On
mysql.allow_persistent = On
mysql.cache_size = 2000
mysql.max_persistent = -1
mysql.max_links = -1
mysql.default_port =
mysql.default_socket =
mysql.default_host =
mysql.default_user =
mysql.default_password =
mysql.connect_timeout = 60
mysql.trace_mode = Off
[MySQLi]
mysqli.max_persistent = -1
mysqli.allow_persistent = On
mysqli.max_links = -1
mysqli.cache_size = 2000
mysqli.default_port = 3306
mysqli.default_socket =
mysqli.default_host =
mysqli.default_user =
mysqli.default_pw =
mysqli.reconnect = Off
[mysqlnd]
mysqlnd.collect_statistics = On
mysqlnd.collect_memory_statistics = Off
[OCI8]
[PostgreSQL]
pgsql.allow_persistent = On
pgsql.auto_reset_persistent = Off
pgsql.max_persistent = -1
pgsql.max_links = -1
pgsql.ignore_notice = 0
pgsql.log_notice = 0
[Sybase-CT]
sybct.allow_persistent = On
sybct.max_persistent = -1
sybct.max_links = -1
sybct.min_server_severity = 10
sybct.min_client_severity = 10
[bcmath]
bcmath.scale = 0
[browscap]
[Session]
session.save_handler = files
session.use_cookies = 1
session.use_only_cookies = 1
session.name = "PHPSESSID"
session.auto_start = 0
session.cookie_lifetime = 0
session.cookie_path = /
session.cookie_domain =
session.cookie_httponly =
session.serialize_handler = php
session.gc_probability = 0
session.gc_divisor = 1000
session.gc_maxlifetime = 1440
session.bug_compat_42 = Off
session.bug_compat_warn = Off
session.referer_check =
session.cache_limiter = nocache
session.cache_expire = 180
session.use_trans_sid = 0
session.hash_function = 0
session.hash_bits_per_character = 5
url_rewriter.tags = "a=href,area=href,frame=src,input=src,form=fakeentry"
session.save_path = "/var/www/web30/tmp"
[MSSQL]
mssql.allow_persistent = On
mssql.max_persistent = -1
mssql.max_links = -1
mssql.min_error_severity = 10
mssql.min_message_severity = 10
mssql.compatability_mode = Off
mssql.secure_connection = Off
[Assertion]
[COM]
[mbstring]
[gd]
[exif]
[Tidy]
tidy.clean_output = Off
[soap]
soap.wsdl_cache_enabled=1
soap.wsdl_cache_dir = "/var/www/web30/tmp"
soap.wsdl_cache_ttl=86400
soap.wsdl_cache_limit = 5
[sysvshm]
[ldap]
ldap.max_links = -1
[mcrypt]
[dba]
[user_ini]
user_ini.filename=None
[suhosin]
suhosin.executor.include.whitelist="phar"
suhosin.upload.verification_script="/usr/lib/liveconfig/uploadscan.sh"
suhosin.session.encrypt=Off
; <EOF>-----------------------------------------------------------------------

--- alt.ini     2013-10-18 09:22:27.964741192 +0200
+++ php.ini     2013-10-17 19:20:42.117764350 +0200
@@ -6,7 +6,7 @@
 ; Copyright (c) 2009-2013 Keppler IT GmbH.
 ; ----------------------------------------------------------------------------
 ; DO NOT MODIFY - ANY CHANGES WILL BE OVERWRITTEN!
-; Last updated at: 2013-10-17 18:30:08 CEST
+; Last updated at: 2013-10-17 19:20:42 CEST
 ; ----------------------------------------------------------------------------
 
 [code=php]
@@ -53,11 +53,8 @@
 allow_url_fopen = On
 allow_url_include = Off
 default_socket_timeout = 60
-magic_quotes_gpc = On
-safe_mode = Off
-register_globals = Off
-error_log = "/var/www/web30/logs/priv/php_errors.log"
 upload_tmp_dir = "/var/www/web30/tmp"
+error_log = "/var/www/web30/logs/priv/php_errors.log"
 [CLI Server]
 cli_server.color = On
 [Date]