Assert fails when elabBuildStyle == BuildAndInstall.

[philderbeast]

I'm doing a clean followed by an install and getting an assertion failure when BuildAndInstall is not expected. Note that I'm tracing elabBuildStyle.

cabal/cabal-install/Distribution/Client/ProjectPlanning.hs

Lines 243 to 245 in 10051c3

	. assert (elabBuildStyle == BuildInplaceOnly ||
	elabComponentId == hashedInstalledPackageId
	(packageHashInputs sharedConfig elab))

> cabal v2-clean
> cabal v2-install flare-timing
...
Build profile: -w ghc-8.2.2 -O1
In order, the following will be built:
BuildAndInstall
Assertion failed
CallStack (from HasCallStack):
  assert, called at ./Distribution/Client/ProjectPlanning.hs:255:5 in
main:Distribution.Client.ProjectPlanning

If I change the condition to the following then the install works:

    -- either a package is built inplace, or we are not attempting to
    -- build any test suites or benchmarks (we never build these
    -- for remote packages!)
  . assert ((traceShowId elabBuildStyle) == BuildInplaceOnly ||
     elabBuildStyle == BuildAndInstall ||
     Set.null elabStanzasAvailable)

> cabal v2-clean
> cabal v2-install flare-timing
...
BuildAndInstall
...
Symlinking 'unpack-track' to '/Users/pdejoux/.cabal/bin/unpack-track'
Symlinking 'fs-arrival' to '/Users/pdejoux/.cabal/bin/fs-arrival'
Symlinking 'align-time' to '/Users/pdejoux/.cabal/bin/align-time'
Symlinking 'area-step' to '/Users/pdejoux/.cabal/bin/area-step'
Symlinking 'fs-filter' to '/Users/pdejoux/.cabal/bin/fs-filter'
Symlinking 'fs-route' to '/Users/pdejoux/.cabal/bin/fs-route'
Symlinking 'mask-track' to '/Users/pdejoux/.cabal/bin/mask-track'
Symlinking 'peg-frame' to '/Users/pdejoux/.cabal/bin/peg-frame'
Symlinking 'task-length' to '/Users/pdejoux/.cabal/bin/task-length'
Symlinking 'discard-further' to '/Users/pdejoux/.cabal/bin/discard-further'
Symlinking 'gap-point' to '/Users/pdejoux/.cabal/bin/gap-point'
Symlinking 'tag-zone' to '/Users/pdejoux/.cabal/bin/tag-zone'
Symlinking 'fs-effort' to '/Users/pdejoux/.cabal/bin/fs-effort'
Symlinking 'fs-score' to '/Users/pdejoux/.cabal/bin/fs-score'
Symlinking 'land-out' to '/Users/pdejoux/.cabal/bin/land-out'
Symlinking 'cross-zone' to '/Users/pdejoux/.cabal/bin/cross-zone'
Symlinking 'extract-input' to '/Users/pdejoux/.cabal/bin/extract-input'

I built cabal from source, updated in the last week:

> git log
commit b89a1c634ab11421b21d56d37be5cd6504faa0d3
(HEAD -> master, upstream/master, origin/master)
Merge: c26cddb2c 7fcb20453
Author: Oleg Grenrus <oleg.grenrus@iki.fi>
Date:   Tue Apr 21 19:19:31 2020 +0300

    Merge pull request #6725 from phadej/disambiguate-flags

    Rename Flag types

> cabal v2-install cabal-install --overwrite-policy=always
...
Resolving dependencies...
Build profile: -w ghc-8.8.3 -O1
In order, the following will be built (use -v for more details):
BuildAndInstall
 - cabal-install-3.3.0.0 (exe:cabal) (requires build)
Starting     cabal-install-3.3.0.0 (exe:cabal)
BuildAndInstall
Building     cabal-install-3.3.0.0 (exe:cabal)
Installing   cabal-install-3.3.0.0 (exe:cabal)
Completed    cabal-install-3.3.0.0 (exe:cabal)
Symlinking 'cabal' to '/Users/pdejoux/.cabal/bin/cabal'

> cabal --version
cabal-install version 3.3.0.0
compiled using version 3.3.0.0 of the Cabal library

[philderbeast]

I can supply the change as a pull request.

[philderbeast]

Same assertion failure reported on #6006.

[philderbeast]

I can no longer reproduce this.