I experience the same issue, here is the GDB backtrace for this:

Program received signal SIGSEGV, Segmentation fault.
lob_stream_read (stream=0x8a8bab4, buf=0x8c0c6c8 "\300\306\300\b\300\306\300\b\034Ċ\b", count=8192)
    at /home/benny/downloads/ibmdb2/PDO_IBM-1.3.2/ibm_statement.c:141
141		switch (col_res->data_type) {
(gdb) bt
#0  lob_stream_read (stream=0x8a8bab4, buf=0x8c0c6c8 "\300\306\300\b\300\306\300\b\034Ċ\b", count=8192)
    at /home/benny/downloads/ibmdb2/PDO_IBM-1.3.2/ibm_statement.c:141
#1  0x0837e47b in php_stream_fill_read_buffer (stream=0x8a8bab4, size=<value optimized out>) at /home/benny/downloads/php-5.3.2/main/streams/streams.c:562
#2  0x0837e761 in _php_stream_read (stream=0x8a8bab4, buf=0x8c0a6c0 "\270\246\300\b\270\246\300\b\034&#266;\b", size=8192)
    at /home/benny/downloads/php-5.3.2/main/streams/streams.c:605
#3  0x0837f47f in _php_stream_copy_to_mem (src=0x8a8bab4, buf=0xbfffcbac, maxlen=4294967295, persistent=0)
    at /home/benny/downloads/php-5.3.2/main/streams/streams.c:1280
#4  0x0833ab29 in zif_stream_get_contents (ht=1, return_value=0x8bfcc74, return_value_ptr=0x0, this_ptr=0x0, return_value_used=1)
    at /home/benny/downloads/php-5.3.2/ext/standard/streamsfuncs.c:425
#5  0x083d906e in execute_internal (execute_data_ptr=0x8abbf90, return_value_used=1) at /home/benny/downloads/php-5.3.2/Zend/zend_execute.c:1260
#6  0x012eaafe in xdebug_execute_internal (current_execute_data=0x8abbf90, return_value_used=1) at /usr/local/zend/temp/xdebug/xdebug.c:1631
#7  0x083e0dbb in zend_do_fcall_common_helper_SPEC (execute_data=0x8abbf90) at /home/benny/downloads/php-5.3.2/Zend/zend_vm_execute.h:315
#8  0x083db53e in execute (op_array=0x8a8b3e8) at /home/benny/downloads/php-5.3.2/Zend/zend_vm_execute.h:104
#9  0x012ea7b7 in xdebug_execute (op_array=0x8a8b3e8) at /usr/local/zend/temp/xdebug/xdebug.c:1562
#10 0x083b80c6 in zend_execute_scripts (type=8, retval=0x0, file_count=3) at /home/benny/downloads/php-5.3.2/Zend/zend.c:1194
#11 0x08366e28 in php_execute_script (primary_file=0xbffff190) at /home/benny/downloads/php-5.3.2/main/main.c:2260
#12 0x0843886d in main (argc=2, argv=0xbffff304) at /home/benny/downloads/php-5.3.2/sapi/cli/php_cli.c:1192

PHP code is:

stream_get_contents($row['CONTENT']);

using a PDO::fetchAll retrieving the data.

Ironically using PDO::fetch, no segfaulting behaviour is occuring.

Hi,

I will analyze the issue and will update you.

Regards,
Ambrish Bhargava

I've found that even using fetch() causes the issue, if I try 
to get the stream content after I've fetched all of the rows. 
I don't know if fetching just one more row causes it, or if it 
is because I am exhausting the cursor.

I worked around this by preemptively decoding all resources as 
I am looping over the returned rows.

Any progress on this? I have the same problem on php 5.5.11 and pdo ibm 1.3.3

Program received signal SIGSEGV, Segmentation fault.
lob_stream_read (stream=0x7ffc804e2998, buf=0x7ffc80542290 "\200\"T\200\374\177", count=8192) at /home/tomazd/projekti/nlb/izracuni-php/src/PDO_IBM-1.3.3/ibm_statement.c:141

Is this still an issue with any of the actively supported PHP
versions[1], or do you get an empty string now, like reported in
bug #81495?

[1] <https://www.php.net/supported-versions.php>

No feedback was provided. The bug is being suspended because
we assume that you are no longer experiencing the problem.
If this is not the case and you are able to provide the
information that was requested earlier, please do so and
change the status of the bug back to "Re-Opened". Thank you.