Description:
------------
Tried this with both PHP 5.4.6 and 5.3.10. Simply enabling vld and executing any 
code in the CLI SAPI's run mode results in memory exhaustion without generation 
of opcode information.

Test script:
---------------
Test 1: echo "<?php function test() { }" | php -dvld.active=1

Test 2: php -dvld.active=1 -r 'function test() { }'

Expected result:
----------------
Finding entry points
Branch analysis from position: 0
Return found
filename:       -
function name:  (null)
number of ops:  2
compiled vars:  none
line     # *  op                           fetch          ext  return  operands
--------------------------------------------------------------------------------
-
   1     0  >   NOP                                                      
   2     1    > RETURN                                                   1

branch: #  0; line:     1-    2; sop:     0; eop:     1
path #1: 0, 
Function test:
Finding entry points
Branch analysis from position: 0
Return found
filename:       -
function name:  test
number of ops:  1
compiled vars:  none
line     # *  op                           fetch          ext  return  operands
--------------------------------------------------------------------------------
-
   1     0  > > RETURN                                                   null

branch: #  0; line:     1-    1; sop:     0; eop:     0
path #1: 0, 
End of function test.

Actual result:
--------------
Test 1: As expected

Test 2:

Finding entry points
Branch analysis from position: 0
Return found
filename:       Command line code
function name:  (null)
number of ops:  2
compiled vars:  none
line     # *  op                           fetch          ext  return  operands
--------------------------------------------------------------------------------
-
   1     0  >   NOP                                                      
         1    > RETURN                                                   null

branch: #  0; line:     1-    1; sop:     0; eop:     1
path #1: 0, 
PHP Fatal error:  Out of memory (allocated -1969750016) (tried to allocate 
1866060001 bytes) in Unknown on line 0