Description:
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After installing the current CSDK 2.90, some database functions using blobs will produce core dumps. This is due to IBM changed the version number for the installed CSDK. Whereas esql -V for 2.80 shows "IBM Informix CSDK 2.80, IBM Informix-ESQL Version 9.52.UC1", 2.90 will show "IBM Informix CSDK Version 2.90, IBM Informix-ESQL Version 2.90.UC1". This leads to a problem in ext/informix/config.m4 where the installed version is read into IFX_VERSION. This value is interpreted in ext/informix/ifx.ec around line 3258 to workaround a bug in older versions. Now, with the wrong version number this will not run properly and tries to deallocate the blob space twice. The bug shows also for PHP 4.3.X and 5.X.X.


Reproduce code:
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ifx_textasvarchar(0);
ifx_blobinfile_mode(0);

// storing BLOB into database
$conn_id = @ifx_connect("database", "user", "password") or die("error connecting to database!");
$blob_id = @ifx_create_blob(1, 0, "This text will be stored as blob") or die("error creating blob!");
$blob[] = $blob_id;
$query_id = @ifx_query("insert into blobtable (blob) values (?)", $conn_id, $blob) or die("error executing sql statement!");
ifx_free_result($query_id);

// retrieving BLOB
$query_id = @ifx_query("select blob from blobtable", $conn_id) or die("error executing sql statement!");
$row_id = @ifx_fetch_row($query_id) or die("error fetching row!");
$blob_id = @ifx_get_blob($row_id["blob"]) or die("error retrieving blob!");
ifx_free_result($query_id);
ifx_close($conn_id);


Expected result:
----------------
The small piece of code will try to store a small text as blob in a database table and retrieve it.

Actual result:
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[Sat Jul 23 15:45:04 2005]  Script:  'ifx_blob_bug.php'
---------------------------------------
/usr/local/src/php-4.4.0/ext/informix/ifx.ec(3259) : Block 0x0977213C status:
Beginning:      Overrun (magic=0x00000011, expected=0x7312F8DC)
      End:      Unknown