Setup: Don't skip repl for indefinite components (#5620)

For some reason repl invocation was skipped for indefinite components.
However, GHCi seems to handle them just fine.

Fixes #5619.

Cabal/Distribution/Simple/GHC.hs

@@ -655,7 +655,7 @@ buildOrReplLib mReplFlags verbosity numJobs pkg_descr lbi lib clbi = do
            unless forRepl $ whenProfLib   (runGhcProgIfNeeded   profCxxOpts)
       | filename <- cxxSources libBi]
 
-  when has_code . ifReplLib $ do
+  ifReplLib $ do
     when (null (allLibModules lib clbi)) $ warn verbosity "No exposed modules"
     ifReplLib (runGhcProg replOpts)
 

cabal-install/changelog

@@ -2,6 +2,7 @@
 
 2.6.0.0 (current development version)
 	* New solver flag: '--reject-unconstrained-dependencies'. (#2568)
+	* "cabal new-repl" now works for indefinite (in the Backpack sense) components.
 
 2.4.0.1
 	* 'new-sdist' now generates tarballs with file modification