Custom select field functionality broken in 0.10

[mgoettsche@…]

The syntax for making a select field optional is broken in 0.10.

Specifying

test = select
test.label = Test
test.options = |Test 1|Test 2|Test 3

leads to two empty options at the top instead of one.

[cmlenz]

Fixed in [3843], ported to 0.10-stable in [3844].

[sid]

#4114 was marked as duplicate of this ticket.