litex_server --jtag fails to connect with openocd 0.12.0

[polprog]

When trying to use litex_server against xc7s target with openocd built from the latest release (0.12.0+dev-snapshot) the initialization fails due to wrong number format in the stream.cfg file.

This is the error message:

$  litex_server --jtag 
[ ... skipped ... ]
[CommUART] port: JTAG / tcp port: 1234
stream.cfg:20: Error: expected integer but got "0x0000
0001
0001
0001
[ ... many more identical lines skipped ... ]
0001
0001
0001"
Traceback (most recent call last):
, in jtagstream_serve
    jtagstream_rxtx xc7.tap ::aio.sockstream5 0
  File "stream.cfg", line 44, in jtagstream_rxtx
    jtagstream_drain xc7.tap {} 128 4096
  File "stream.cfg", line 30, in jtagstream_drain
    jtagstream_poll xc7.tap {} 128
  File "stream.cfg", line 20, in jtagstream_poll
    expr { "0x${rxj}" & 0x200 }

I think this is due to the excess "0x" format in expr, but I do not know where the stream.cfg file comes from, it seems to be auto-generated.

I believe I have updated LiteX to the latest release (2025.04) but litex_server does not show any version info.

[polprog]

The fix is to use older version of openocd, 0.11 works.