Pipe syntax not working as advertised in v1.5.29

[apstndb]

The release note for v1.5.29 states:

Enabling GoogleSQL pipe syntax.

However, I'm encountering a syntax error when attempting to use pipe syntax (FROM query) with the emulator. Specifically, running a simple query like the one below fails:

spanner> FROM (SELECT 1);
ERROR: spanner: code="InvalidArgument", desc: Syntax error: Unexpected FROM [at 1:1]
FROM (SELECT 1)
^

I know the pipe syntax is not yet officially released in the real Spanner instance, but it should work in the emulator as written in the release note.