Apparently it's lindex, not index.

diff --git a/build/update_oldconfig b/build/update_oldconfig
index 3332bf7..e50a4e3 100755 (executable)
--- a/build/update_oldconfig
+++ b/build/update_oldconfig
@@ -1,7 +1,7 @@
 #!/usr/bin/expect -f
 
 # log all interaction to a file to diagnose failures
 #!/usr/bin/expect -f
 
 # log all interaction to a file to diagnose failures

-log_file [index $argv 0]
+log_file [lindex $argv 0]

 
 # and not stddout
 log_user 0
 
 # and not stddout
 log_user 0