Description:
------------
PHP segfaults when using PDO: PGSQL and prepared statements with bindParam() and execute().

Reproduce code:
---------------
$dsn = 'pgsql:...';
$user = '...';
$pass = '...';
$db = new PDO($dsn, $user, $pass);
$statement = $db->prepare("INSERT INTO testinggrounds (name, data) VALUES (:name, :data)");
$statement->execute(array('date', date('r')));
echo "First statement OK\n";
$statement->bindParam(':name', $name);
$statement->bindParam(':data', $data);
echo "Params bound to PHP variables\n";
// Insert a row
$name = 'date';
$data = 'test';
$statement->execute();
echo "Second statement OK\n";

Expected result:
----------------
First statement OK
Params bound to PHP variables
Second statement OK

Actual result:
--------------
First statement OK
Params bound to PHP variables
Segmentation fault

GDB backtrace:
(gdb) run
Starting program: /usr/local/bin/php PDO_dbg.php
[Thread debugging using libthread_db enabled]
[New Thread -1217852832 (LWP 19309)]
First statement OK
Params bound to PHP variables

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread -1217852832 (LWP 19309)]
0xb7d9f50a in pqHandleSendFailure () from /usr/lib/libpq.so.4
(gdb) bt
#0  0xb7d9f50a in pqHandleSendFailure () from /usr/lib/libpq.so.4
#1  0xb7da0091 in PQexecPrepared () from /usr/lib/libpq.so.4
#2  0x0813d505 in pgsql_stmt_execute (stmt=0x85b0104, tsrm_ls=0x8439018)
    at /shared/src/php/php5-200511221330/ext/pdo_pgsql/pgsql_statement.c:122
#3  0x0813704a in zif_PDOStatement_execute (ht=0, return_value=0x85b0604,
    return_value_ptr=0x0, this_ptr=0x85b3b6c, return_value_used=0,
    tsrm_ls=0x8439018)
    at /shared/src/php/php5-200511221330/ext/pdo/pdo_stmt.c:424
#4  0x082be11e in zend_do_fcall_common_helper_SPEC (execute_data=0xbfae2b6c,
    tsrm_ls=0x8439018) at zend_vm_execute.h:188
#5  0x082bd70a in execute (op_array=0x859524c, tsrm_ls=0x8439018)
    at zend_vm_execute.h:88
#6  0x08298a4e in zend_execute_scripts (type=8, tsrm_ls=0x8439018, retval=Variable "retval" is not available.
)
    at /shared/src/php/php5-200511221330/Zend/zend.c:1090
#7  0x0825affa in php_execute_script (primary_file=0xbfae4f6c,
    tsrm_ls=0x8439018) at /shared/src/php/php5-200511221330/main/main.c:1704
#8  0x08332977 in main (argc=2, argv=0xbfae5054)
    at /shared/src/php/php5-200511221330/sapi/cli/php_cli.c:1039
(gdb) bt full
#0  0xb7d9f50a in pqHandleSendFailure () from /usr/lib/libpq.so.4
No symbol table info available.
#1  0xb7da0091 in PQexecPrepared () from /usr/lib/libpq.so.4
No symbol table info available.
#2  0x0813d505 in pgsql_stmt_execute (stmt=0x85b0104, tsrm_ls=0x8439018)
    at /shared/src/php/php5-200511221330/ext/pdo_pgsql/pgsql_statement.c:122
        S = (pdo_pgsql_stmt *) 0x85b028c
        H = (pdo_pgsql_db_handle *) 0x859a06c
        status = Variable "status" is not available.
(gdb)

Thanks