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-rw-r--r--compiler/main/Packages.hs10
-rw-r--r--testsuite/tests/backpack/cabal/bkpcabal01/p/P.hs.in11
2 files changed, 9 insertions, 2 deletions
diff --git a/compiler/main/Packages.hs b/compiler/main/Packages.hs
index c49581b0d9..14407be418 100644
--- a/compiler/main/Packages.hs
+++ b/compiler/main/Packages.hs
@@ -1892,8 +1892,14 @@ listVisibleModuleNames dflags =
getPreloadPackagesAnd :: DynFlags -> [PreloadUnitId] -> IO [PackageConfig]
getPreloadPackagesAnd dflags pkgids0 =
let
- pkgids = pkgids0 ++ map (toInstalledUnitId . moduleUnitId . snd)
- (thisUnitIdInsts dflags)
+ pkgids = pkgids0 ++
+ -- An indefinite package will have insts to HOLE,
+ -- which is not a real package. Don't look it up.
+ -- Fixes #14525
+ if isIndefinite dflags
+ then []
+ else map (toInstalledUnitId . moduleUnitId . snd)
+ (thisUnitIdInsts dflags)
state = pkgState dflags
pkg_map = pkgIdMap state
preload = preloadPackages state
diff --git a/testsuite/tests/backpack/cabal/bkpcabal01/p/P.hs.in1 b/testsuite/tests/backpack/cabal/bkpcabal01/p/P.hs.in1
index 327a032132..875c370915 100644
--- a/testsuite/tests/backpack/cabal/bkpcabal01/p/P.hs.in1
+++ b/testsuite/tests/backpack/cabal/bkpcabal01/p/P.hs.in1
@@ -1,3 +1,4 @@
+{-# LANGUAGE CPP #-}
module P where
import H
y = x