cabal: 'parseField' called on a non-field. Consider this a bug.

[igfoo]

Given this q.cabal:

name:         p
version:      1
category:     None
synopsis:     Test
license:      BSD3

build-type: Simple
cabal-version: >=1.8

flag f
  default True
  manual: True

executable e
  main-is: Main.hs

running "cabal configure" says

cabal: 'parseField' called on a non-field. Consider this a bug.

This is caused by the missing colon after "default".

I can reproduce this both with a cabal that identifies itself as

cabal-install version 0.14.0
using version 1.14.0 of the Cabal library 

and with one taken from the 1.16 branch today.

[rrnewton]

Note, I just ran into this same bug when I accidentally inserted a bit of white space before the "Test-Suite" keyword. Very confusing!

I am using a fairly recent cabal HEAD (1.17).

[gbaz]

now:

Errors encountered when parsing cabal file ./q.cabal:

q.cabal:11:3: error:
invalid subsection "default"

   10 | flag f
   11 |   default True
      |   ^