diff --git a/testsuite/tests/backpack/cabal/bkpcabal02/bkpcabal02.stdout b/testsuite/tests/backpack/cabal/bkpcabal02/bkpcabal02.stdout
index 2f17fdffcd8fb2243185d0de553e26dfe79bbe5f..1e51c3c4ac3387b24560d616d682af12f9abb526 100644
--- a/testsuite/tests/backpack/cabal/bkpcabal02/bkpcabal02.stdout
+++ b/testsuite/tests/backpack/cabal/bkpcabal02/bkpcabal02.stdout
@@ -1,6 +1,11 @@
+ignoring (possibly broken) abi-depends field for packages
+ignoring (possibly broken) abi-depends field for packages
Preprocessing library 'p' for bkpcabal01-0.1.0.0..
Building library 'p' instantiated with H = <H>
for bkpcabal01-0.1.0.0..
+ignoring (possibly broken) abi-depends field for packages
Preprocessing library 'q' for bkpcabal01-0.1.0.0..
Building library 'q' instantiated with H = <H>
for bkpcabal01-0.1.0.0..
+ignoring (possibly broken) abi-depends field for packages
+ignoring (possibly broken) abi-depends field for packages
diff --git a/testsuite/tests/cabal/T12485a.stdout b/testsuite/tests/cabal/T12485a.stdout
index ee83ab293c8e7322c39fe564618fece475a801fb..af722c524af2dc3f2212b4a6fd8e30bbc95778b0 100644
--- a/testsuite/tests/cabal/T12485a.stdout
+++ b/testsuite/tests/cabal/T12485a.stdout
@@ -1,3 +1,4 @@
+ignoring (possibly broken) abi-depends field for packages
should SUCCEED
should SUCCEED
should SUCCEED
diff --git a/testsuite/tests/cabal/T5442d.stdout b/testsuite/tests/cabal/T5442d.stdout
index f3214578d254bbccd56ea0c907fac99b0d76c8f0..0cb7375fbf7b08a5d02bf5acff279644d36f1e9f 100644
--- a/testsuite/tests/cabal/T5442d.stdout
+++ b/testsuite/tests/cabal/T5442d.stdout
@@ -1,6 +1,7 @@
Reading package info from "shadow1.pkg" ... done.
Reading package info from "shadow4.pkg" ... done.
Reading package info from "shadow2.pkg" ... done.
+ignoring (possibly broken) abi-depends field for packages
global (should be empty):
user:
shadow-2
diff --git a/testsuite/tests/cabal/cabal01/cabal01.stdout b/testsuite/tests/cabal/cabal01/cabal01.stdout
index e828cbe68a0cb2d8f954c40f4ef3c6511f9837f5..1378031cb140c7ae3c3c79df467a9296a910dbd2 100644
--- a/testsuite/tests/cabal/cabal01/cabal01.stdout
+++ b/testsuite/tests/cabal/cabal01/cabal01.stdout
@@ -1,3 +1,4 @@
+ignoring (possibly broken) abi-depends field for packages
install1:
bin
lib
diff --git a/testsuite/tests/cabal/cabal06/cabal06.stdout b/testsuite/tests/cabal/cabal06/cabal06.stdout
index e5ff042302ab9d84aa41f0d62f083da91e89aaf1..381363977c2dbb8cd5249345d2eea4eed5c15e2e 100644
--- a/testsuite/tests/cabal/cabal06/cabal06.stdout
+++ b/testsuite/tests/cabal/cabal06/cabal06.stdout
@@ -1,3 +1,7 @@
+ignoring (possibly broken) abi-depends field for packages
+ignoring (possibly broken) abi-depends field for packages
+ignoring (possibly broken) abi-depends field for packages
+ignoring (possibly broken) abi-depends field for packages
Does the first instance of q depend on p-1.0?
1
Does the second instance of q depend on p-1.0?
diff --git a/testsuite/tests/cabal/cabal08/cabal08.stdout b/testsuite/tests/cabal/cabal08/cabal08.stdout
index 06a164b15009644a974d1046ecbf97f791b22256..d70d778151acc85173ba68041eb9bbbbc2cda523 100644
--- a/testsuite/tests/cabal/cabal08/cabal08.stdout
+++ b/testsuite/tests/cabal/cabal08/cabal08.stdout
@@ -1,3 +1,5 @@
+ignoring (possibly broken) abi-depends field for packages
+ignoring (possibly broken) abi-depends field for packages
[1 of 1] Compiling Main ( Main.hs, Main.o )
Linking Main ...
p2
diff --git a/testsuite/tests/cabal/shadow.stdout b/testsuite/tests/cabal/shadow.stdout
index a47ce15795d070131f5239c8687b073ab84d62ee..c70767da1d4f441ebe5ec1d26788b033a746e8a8 100644
--- a/testsuite/tests/cabal/shadow.stdout
+++ b/testsuite/tests/cabal/shadow.stdout
@@ -1,3 +1,4 @@
+ignoring (possibly broken) abi-depends field for packages
databases 1 and 2:
localshadow1.package.conf
(shadow-1)
diff --git a/testsuite/tests/driver/recomp007/recomp007.stdout b/testsuite/tests/driver/recomp007/recomp007.stdout
index d8343152e0c5d260faa86f800eb74277fc63357b..d5da3dae18b70be0c6a2b5ed457733afa78c64e1 100644
--- a/testsuite/tests/driver/recomp007/recomp007.stdout
+++ b/testsuite/tests/driver/recomp007/recomp007.stdout
@@ -1,3 +1,5 @@
+ignoring (possibly broken) abi-depends field for packages
+ignoring (possibly broken) abi-depends field for packages
Preprocessing executable 'test' for b-1.0..
Building executable 'test' for b-1.0..
[1 of 2] Compiling B ( B.hs, dist/build/test/test-tmp/B.o ) [A changed]
diff --git a/testsuite/tests/safeHaskell/check/pkg01/safePkg01.stdout b/testsuite/tests/safeHaskell/check/pkg01/safePkg01.stdout
index 59886cd378f17a7fc3235c1b411102d5263166be..8d6378430b4a5f6b97e2312bcbdd2d243b9a022f 100644
--- a/testsuite/tests/safeHaskell/check/pkg01/safePkg01.stdout
+++ b/testsuite/tests/safeHaskell/check/pkg01/safePkg01.stdout
@@ -1,49 +1,53 @@
+ignoring (possibly broken) abi-depends field for packages
pdb.safePkg01/local.db
safePkg01-1.0
trusted: False
M_SafePkg
-package dependencies: base-4.9.0.0* ghc-prim-0.5.0.0 integer-gmp-1.0.0.0
+package dependencies: base-4.11.0.0* ghc-prim-0.5.2.0 integer-gmp-1.0.1.0
trusted: safe
require own pkg trusted: False
M_SafePkg2
-package dependencies: base-4.9.0.0 ghc-prim-0.5.0.0 integer-gmp-1.0.0.0
+package dependencies: base-4.11.0.0 ghc-prim-0.5.2.0 integer-gmp-1.0.1.0
trusted: trustworthy
require own pkg trusted: False
M_SafePkg3
-package dependencies: base-4.9.0.0* ghc-prim-0.5.0.0 integer-gmp-1.0.0.0
+package dependencies: base-4.11.0.0* ghc-prim-0.5.2.0 integer-gmp-1.0.1.0
trusted: safe
require own pkg trusted: True
M_SafePkg4
-package dependencies: base-4.9.0.0* ghc-prim-0.5.0.0 integer-gmp-1.0.0.0
+package dependencies: base-4.11.0.0* ghc-prim-0.5.2.0 integer-gmp-1.0.1.0
trusted: safe
require own pkg trusted: True
M_SafePkg5
-package dependencies: base-4.9.0.0* ghc-prim-0.5.0.0 integer-gmp-1.0.0.0
+package dependencies: base-4.11.0.0* ghc-prim-0.5.2.0 integer-gmp-1.0.1.0
trusted: safe
require own pkg trusted: True
M_SafePkg6
-package dependencies: array-0.5.1.0 base-4.9.0.0* bytestring-0.10.7.0* deepseq-1.4.2.0 ghc-prim-0.5.0.0 integer-gmp-1.0.0.0
+package dependencies: array-0.5.2.0 base-4.11.0.0* bytestring-0.10.8.2* deepseq-1.4.3.0 ghc-prim-0.5.2.0 integer-gmp-1.0.1.0
trusted: trustworthy
require own pkg trusted: False
M_SafePkg7
-package dependencies: array-0.5.1.0 base-4.9.0.0* bytestring-0.10.7.0* deepseq-1.4.2.0 ghc-prim-0.5.0.0 integer-gmp-1.0.0.0
+package dependencies: array-0.5.2.0 base-4.11.0.0* bytestring-0.10.8.2* deepseq-1.4.3.0 ghc-prim-0.5.2.0 integer-gmp-1.0.1.0
trusted: safe
require own pkg trusted: False
M_SafePkg8
-package dependencies: array-0.5.1.0 base-4.9.0.0 bytestring-0.10.7.0* deepseq-1.4.2.0 ghc-prim-0.5.0.0 integer-gmp-1.0.0.0
+package dependencies: array-0.5.2.0 base-4.11.0.0 bytestring-0.10.8.2* deepseq-1.4.3.0 ghc-prim-0.5.2.0 integer-gmp-1.0.1.0
trusted: trustworthy
require own pkg trusted: False
Testing setting trust
+ignoring (possibly broken) abi-depends field for packages
trusted: True
+ignoring (possibly broken) abi-depends field for packages
trusted: False
+ignoring (possibly broken) abi-depends field for packages
trusted: False
diff --git a/testsuite/tests/typecheck/T13168/T13168.stdout b/testsuite/tests/typecheck/T13168/T13168.stdout
index a935d2ffb3bf9ab0af958fc45e9f108c32234070..32eec3e0026e10c52243eaa286c565673a55e245 100644
--- a/testsuite/tests/typecheck/T13168/T13168.stdout
+++ b/testsuite/tests/typecheck/T13168/T13168.stdout
@@ -1 +1,3 @@
+ignoring (possibly broken) abi-depends field for packages
+ignoring (possibly broken) abi-depends field for packages
Window
diff --git a/utils/ghc-pkg/Main.hs b/utils/ghc-pkg/Main.hs
index 0e793b491783d6db891d9f4b0b1ff2cce2e75d30..0bedbb2c4c2cb76a499649280b16716b6a8cc776 100644
--- a/utils/ghc-pkg/Main.hs
+++ b/utils/ghc-pkg/Main.hs
@@ -1209,7 +1209,18 @@ updateDBCache verbosity db = do
pkgsCabalFormat = packages db
pkgsGhcCacheFormat :: [PackageCacheFormat]
- pkgsGhcCacheFormat = map convertPackageInfoToCacheFormat pkgsCabalFormat
+ pkgsGhcCacheFormat
+ = map (recomputeValidAbiDeps pkgsCabalFormat) -- Note [Recompute abi-depends]
+ $ map convertPackageInfoToCacheFormat
+ pkgsCabalFormat
+
+ hasAnyAbiDepends :: InstalledPackageInfo -> Bool
+ hasAnyAbiDepends x = length (abiDepends x) > 0
+
+ -- warn when we find any (possibly-)bogus abi-depends fields;
+ -- Note [Recompute abi-depends]
+ when (any hasAnyAbiDepends pkgsCabalFormat) $
+ infoLn "ignoring (possibly broken) abi-depends field for packages"
when (verbosity > Normal) $
infoLn ("writing cache " ++ filename)
@@ -1232,6 +1243,45 @@ type PackageCacheFormat = GhcPkg.InstalledPackageInfo
ModuleName
OpenModule
+{- Note [Recompute abi-depends]
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Like most fields, `ghc-pkg` relies on who-ever is performing package
+registration to fill in fields; this includes the `abi-depends` field present
+for the package.
+
+However, this was likely a mistake, and is not very robust; in certain cases,
+versions of Cabal may use bogus abi-depends fields for a package when doing
+builds. Why? Because package database information is aggressively cached; it is
+possible to work Cabal into a situation where it uses a cached version of
+`abi-depends`, rather than the one in the actual database after it has been
+recomputed.
+
+However, there is an easy fix: ghc-pkg /already/ knows the `abi-depends` of a
+package, because they are the ABIs of the packages pointed at by the `depends`
+field. So it can simply look up the abi from the dependencies in the original
+database, and ignore whatever the system registering gave it.
+
+So, instead, we do two things here:
+
+ - We throw away the information for a registered package's `abi-depends` field.
+
+ - We recompute it: we simply look up the unit ID of the package in the original
+ database, and use *its* abi-depends.
+
+See Trac #14381, and Cabal issue #4728.
+
+-}
+
+recomputeValidAbiDeps :: [InstalledPackageInfo] -> PackageCacheFormat -> PackageCacheFormat
+recomputeValidAbiDeps db pkg = pkg { GhcPkg.abiDepends = catMaybes (newAbiDeps) }
+ where
+ newAbiDeps = flip map (GhcPkg.abiDepends pkg) $ \(k, _) ->
+ case filter (\d -> installedUnitId d == k) db of
+ [] -> Nothing
+ [x] -> Just (k, unAbiHash (abiHash x))
+ _ -> Nothing -- ???
+
convertPackageInfoToCacheFormat :: InstalledPackageInfo -> PackageCacheFormat
convertPackageInfoToCacheFormat pkg =
GhcPkg.InstalledPackageInfo {