Mutually-dependent packages don't play nicely with stack ghci

[DaveCTurner]

#2583 (comment) indicates that you're allowed to have two packages, pkg-a and pkg-b that form a dependency cycle in the sense that pkg-a:test depends on pkg-b:lib which depends on pkg-a:lib. However this doesn't seem to play nicely with stack ghci:

mkdir -p pkg-a pkg-b

cat <<EOF >./stack.yaml
resolver: lts-8.13
packages:
  - 'pkg-a'
  - 'pkg-b'
EOF

cat <<EOF >./pkg-a/pkg-a.cabal
name:                pkg-a
version:             0.1.0.0
license:             BSD3
build-type:          Simple
cabal-version:       >=1.10

library
  exposed-modules:     LibA
  build-depends:       base >= 4.7 && < 5
  default-language:    Haskell2010

test-suite pkg-a-test
  type:                exitcode-stdio-1.0
  main-is:             Spec.hs
  build-depends:       base
                     , pkg-b
  default-language:    Haskell2010
EOF

cat <<EOF >./pkg-a/Setup.hs
import Distribution.Simple
main = defaultMain
EOF

cat <<EOF >./pkg-a/LibA.hs
module LibA where

funcA :: Int -> Int
funcA = (+7)
EOF

cat <<EOF >./pkg-b/pkg-b.cabal
name:                pkg-b
version:             0.1.0.0
license:             BSD3
build-type:          Simple
cabal-version:       >=1.10

library
  exposed-modules:     LibB
  build-depends:       base >= 4.7 && < 5
    , pkg-a
  default-language:    Haskell2010
EOF

cat <<EOF >./pkg-b/LibB.hs
module LibB where

import LibA

funcB :: Int -> Int
funcB = (*4) . funcA
EOF

cat <<EOF >./pkg-b/Setup.hs
import Distribution.Simple
main = defaultMain
EOF

cat <<EOF >./pkg-a/Spec.hs
import LibB

main :: IO ()
main = if funcB 7 == 56 then return () else undefined
EOF

stack ghci pkg-a/Spec.hs

Output:

Using configuration for pkg-a:test:pkg-a-test to load /home/linuxadmin/stack-dep-cycle/repro/pkg-a/Spec.hs
pkg-a-0.1.0.0: configure (lib)
Configuring pkg-a-0.1.0.0...
pkg-a-0.1.0.0: initial-build-steps (lib)
Configuring GHCi with the following packages: pkg-a
Using main module: 1. Package `pkg-a' component test:pkg-a-test with main-is file: ../pkg-a/Spec.hs
GHCi, version 8.0.2: http://www.haskell.org/ghc/  :? for help
<command line>: cannot satisfy -package pkg-b-0.1.0.0
    (use -v for more information)

If pkg-b is built (via stack build pkg-b) then stack ghci pkg-a/Spec.hs outputs:

$ stack ghci pkg-a/Spec.hs
Using configuration for pkg-a:test:pkg-a-test to load /home/linuxadmin/stack-dep-cycle/repro/pkg-a/Spec.hs
Configuring GHCi with the following packages: pkg-a
Using main module: 1. Package `pkg-a' component test:pkg-a-test with main-is file: /home/linuxadmin/stack-dep-cycle/repro/pkg-a/Spec.hs
GHCi, version 8.0.2: http://www.haskell.org/ghc/  :? for help
[1 of 1] Compiling Main             ( /home/linuxadmin/stack-dep-cycle/repro/pkg-a/Spec.hs, interpreted )
Ok, modules loaded: Main.
Loaded GHCi configuration from /tmp/ghci31095/ghci-script
*Main>

I think it should do this without having to build pkg-b first.

[mpilgrem]

I am closing this issue given the passage of time and because I could not reproduce the issue with Stack 2.15.5. With a two-package project ('package-A', 'package-B') where the test suite of package-A depends on the library of package-B and the library of package-B depends on the library of package-A: (1) stack build worked as expected and (2) stack ghci package-A/test/Spec.hs worked as expected.