[build] error on switch_svn_vm

[Kalpak Gadre]

hi,

switch_svn_vm target fails with output:
switch_svn_vm:
    [exec] svn: Syntax error in revision argument 'switch'

Reason being,

show_props:
    [echo]
    [echo]                    Apache Harmony Federated Build
    [echo]             ==========================================
    [echo]             svn rev          :  r
    [echo]             operating system :  linux
    [echo]             architecture     :  x86-32
    [echo]             ant os name/arch :  Linux/x86
    [echo]             output location  :  target
    [echo]             DRLVM classlib   :  ../../../working_classlib
    [echo]

svn revision is not populated for some reason.

svn info build.xml produces:

Path: build.xml
Name: build.xml
URL: https://svn.apache.org/repos/asf/harmony/enhanced/trunk/build.xml
Repository Root: https://svn.apache.org/repos/asf
Repository UUID: 13f79535-47bb-0310-9956-ffa450edef68
Revision: 507493
Node Kind: file
Schedule: normal
Last Changed Author: geirm
Last Changed Rev: 486417
Last Changed Date: 2006-12-13 05:18:39 +0530 (Wed, 13 Dec 2006)
Text Last Updated: 2007-02-14 22:18:19 +0530 (Wed, 14 Feb 2007)
Checksum: 7b2cdce3cea7df2b770469a2692c05ff

For some reason, svn.revision.tmp is not getting populated for me. I am 
using ant 1.7.0

Any idea why is this failing?

Thanks,

Kalpak