Description:
------------
utf8_decode() make a crash

php.log: no entry
error.log: no entry
/var/log/messages: no entry
access.log: "GET test.php HTTP/1.1" 200 2 
without echo 'A';:
"GET test.php HTTP/1.1" 500 0

iconv("UTF-8", "ISO-8859-1", 'Hallo'); is working

make test: a report was sending

CFLAGS="-O3 -mcpu=pentium4 -march=pentium4"
CPPFLAGS="-O3 -mcpu=pentium4 -march=pentium4"
CXXFLAGS="-O3 -mcpu=pentium4 -march=pentium4"
export CFLAGS
export CPPFLAGS
export CXXFLAGS
./configure \
--prefix=/usr/local/apache2 \
--with-apxs2=/usr/local/apache2/bin/apxs \
--enable-shared \
--enable-soap \
--with-zlib \
--with-openssl \
--disable-cgi \
--disable-xml \
--disable-xmlreader \
--disable-xmlwriter \
--disable-dom \
--disable-pdo \
--disable-debug \
--without-pear \
--with-config-file-path=/etc/php5/apache2






Reproduce code:
---------------
<?php
echo 'A';
echo utf8_decode('Hallo');
echo 'B';
?>

Expected result:
----------------
AHalloB

Actual result:
--------------
A