\section[CompManager]{The Compilation Manager}
\begin{code}
+{-# OPTIONS -fvia-C #-}
module CompManager (
cmInit, -- :: GhciMode -> IO CmState
cmLoadModule, -- :: CmState -> FilePath -> IO (CmState, [String])
- cmUnload, -- :: CmState -> IO CmState
+ cmUnload, -- :: CmState -> DynFlags -> IO CmState
cmSetContext, -- :: CmState -> String -> IO CmState
cmGetContext, -- :: CmState -> IO String
#ifdef GHCI
- cmRunStmt, -- :: CmState -> DynFlags -> String -> IO (CmState, [Name])
+ cmInfoThing, -- :: CmState -> DynFlags -> String -> IO (Maybe TyThing)
- cmTypeOfExpr, -- :: CmState -> DynFlags -> String
- -- -> IO (CmState, Maybe String)
+ CmRunResult(..),
+ cmRunStmt, -- :: CmState -> DynFlags -> String -> IO (CmState, CmRunResult)
+
+ cmTypeOfExpr, -- :: CmState -> DynFlags -> String
+ -- -> IO (CmState, Maybe String)
cmTypeOfName, -- :: CmState -> Name -> IO (Maybe String)
import CmLink
import CmTypes
-import CmStaticInfo ( GhciMode(..) )
import DriverPipeline
import DriverFlags ( getDynFlags )
+import DriverState ( v_Output_file )
import DriverPhases
import DriverUtil
import Finder
+#ifdef GHCI
+import HscMain ( initPersistentCompilerState, hscThing )
+#else
import HscMain ( initPersistentCompilerState )
+#endif
import HscTypes
import RnEnv ( unQualInScope )
import Id ( idType, idName )
-import Name ( Name, NamedThing(..), nameRdrName )
+import Name ( Name, NamedThing(..), nameRdrName, nameModule,
+ isHomePackageName )
import NameEnv
import RdrName ( lookupRdrEnv, emptyRdrEnv )
import Module
import VarEnv ( emptyTidyEnv )
import UniqFM
import Unique ( Uniquable )
-import Digraph ( SCC(..), stronglyConnComp, flattenSCC )
+import Digraph ( SCC(..), stronglyConnComp, flattenSCC, flattenSCCs )
import ErrUtils ( showPass )
+import SysTools ( cleanTempFilesExcept )
import Util
-import TmpFiles
import Outputable
+import BasicTypes ( Fixity, defaultFixity )
import Panic
import CmdLineOpts ( DynFlags(..) )
+
import IOExts
#ifdef GHCI
#endif
-- lang
-import Exception ( throwDyn )
+import Foreign
+import CForeign
+import Exception ( Exception, try, throwDyn )
-- std
import Directory ( getModificationTime, doesFileExist )
cmSetContext :: CmState -> String -> IO CmState
cmSetContext cmstate str
= do let mn = mkModuleName str
- modules_loaded = [ (name_of_summary s, ms_mod s) | s <- mg cmstate ]
+ modules_loaded = [ (name_of_summary s, ms_mod s) | s <- mg cmstate ]
m <- case lookup mn modules_loaded of
Just m -> return m
Just (m,_) -> return m
-----------------------------------------------------------------------------
+-- cmInfoThing: convert a String to a TyThing
+
+-- A string may refer to more than one TyThing (eg. a constructor,
+-- and type constructor), so we return a list of all the possible TyThings.
+
+#ifdef GHCI
+cmInfoThing :: CmState -> DynFlags -> String
+ -> IO (CmState, PrintUnqualified, [(TyThing,Fixity)])
+cmInfoThing cmstate dflags id
+ = do (new_pcs, things) <- hscThing dflags hst hit pcs icontext id
+ let pairs = map (\x -> (x, getFixity new_pcs (getName x))) things
+ return (cmstate{ pcs=new_pcs }, unqual, pairs)
+ where
+ CmState{ hst=hst, hit=hit, pcs=pcs, pls=pls, ic=icontext } = cmstate
+ unqual = getUnqual pcs hit icontext
+
+ getFixity :: PersistentCompilerState -> Name -> Fixity
+ getFixity pcs name
+ | Just iface <- lookupModuleEnv iface_table (nameModule name),
+ Just fixity <- lookupNameEnv (mi_fixities iface) name
+ = fixity
+ | otherwise
+ = defaultFixity
+ where iface_table | isHomePackageName name = hit
+ | otherwise = pcs_PIT pcs
+#endif
+
+-----------------------------------------------------------------------------
-- cmRunStmt: Run a statement/expr.
#ifdef GHCI
-cmRunStmt :: CmState -> DynFlags -> String
- -> IO (CmState, -- new state
- [Name]) -- names bound by this evaluation
-cmRunStmt cmstate dflags expr
+data CmRunResult
+ = CmRunOk [Name] -- names bound by this evaluation
+ | CmRunFailed
+ | CmRunDeadlocked -- statement deadlocked
+ | CmRunException Exception -- statement raised an exception
+
+cmRunStmt :: CmState -> DynFlags -> String -> IO (CmState, CmRunResult)
+cmRunStmt cmstate@CmState{ hst=hst, hit=hit, pcs=pcs, pls=pls, ic=icontext }
+ dflags expr
= do
let InteractiveContext {
ic_rn_env = rn_env,
<- hscStmt dflags hst hit pcs icontext expr False{-stmt-}
case maybe_stuff of
- Nothing -> return (cmstate{ pcs=new_pcs }, [])
+ Nothing -> return (cmstate{ pcs=new_pcs }, CmRunFailed)
Just (ids, _, bcos) -> do
-- update the interactive context
-- run it!
let thing_to_run = unsafeCoerce# hval :: IO [HValue]
- hvals <- thing_to_run
-
- -- Get the newly bound things, and bind them. Don't forget
- -- to delete any shadowed bindings from the closure_env, lest
- -- we end up with a space leak.
- pls <- delListFromClosureEnv pls shadowed
- new_pls <- addListToClosureEnv pls (zip names hvals)
-
- return (cmstate{ pcs=new_pcs, pls=new_pls, ic=new_ic }, names)
- where
- CmState{ hst=hst, hit=hit, pcs=pcs, pls=pls, ic=icontext } = cmstate
+ either_hvals <- sandboxIO thing_to_run
+ case either_hvals of
+ Left err
+ | err == dEADLOCKED
+ -> return ( cmstate{ pcs=new_pcs, ic=new_ic },
+ CmRunDeadlocked )
+ | otherwise
+ -> do hPutStrLn stderr ("unknown failure, code " ++ show err)
+ return ( cmstate{ pcs=new_pcs, ic=new_ic }, CmRunFailed )
+
+ Right maybe_hvals ->
+ case maybe_hvals of
+ Left e ->
+ return ( cmstate{ pcs=new_pcs, ic=new_ic },
+ CmRunException e )
+ Right hvals -> do
+ -- Get the newly bound things, and bind them.
+ -- Don't forget to delete any shadowed bindings from the
+ -- closure_env, lest we end up with a space leak.
+ pls <- delListFromClosureEnv pls shadowed
+ new_pls <- addListToClosureEnv pls (zip names hvals)
+
+ return (cmstate{ pcs=new_pcs, pls=new_pls, ic=new_ic },
+ CmRunOk names)
+
+-- We run the statement in a "sandbox", which amounts to calling into
+-- the RTS to request a new main thread. The main benefit is that we
+-- get to detect a deadlock this way, but also there's no danger that
+-- exceptions raised by the expression can affect the interpreter.
+
+sandboxIO :: IO a -> IO (Either Int (Either Exception a))
+sandboxIO thing = do
+ st_thing <- newStablePtr (Exception.try thing)
+ alloca $ \ p_st_result -> do
+ stat <- rts_evalStableIO st_thing p_st_result
+ freeStablePtr st_thing
+ if stat == 1
+ then do st_result <- peek p_st_result
+ result <- deRefStablePtr st_result
+ freeStablePtr st_result
+ return (Right result)
+ else do
+ return (Left (fromIntegral stat))
+
+-- ToDo: slurp this in from ghc/includes/RtsAPI.h somehow
+dEADLOCKED = 4 :: Int
+
+foreign import "rts_evalStableIO" {- safe -}
+ rts_evalStableIO :: StablePtr (IO a) -> Ptr (StablePtr a) -> IO CInt
+ -- more informative than the C type!
#endif
-----------------------------------------------------------------------------
case maybe_stuff of
Nothing -> return (new_cmstate, Nothing)
- Just (_, ty, _) ->
- let pit = pcs_PIT pcs
- modname = moduleName (ic_module ic)
- tidy_ty = tidyType emptyTidyEnv ty
- str = case lookupIfaceByModName hit pit modname of
- Nothing -> showSDoc (ppr tidy_ty)
- Just iface -> showSDocForUser unqual (ppr tidy_ty)
- where unqual = unQualInScope (mi_globals iface)
- in return (new_cmstate, Just str)
+ Just (_, ty, _) -> return (new_cmstate, Just str)
+ where
+ str = showSDocForUser unqual (ppr tidy_ty)
+ unqual = getUnqual pcs hit ic
+ tidy_ty = tidyType emptyTidyEnv ty
where
CmState{ hst=hst, hit=hit, pcs=pcs, ic=ic } = cmstate
#endif
+getUnqual pcs hit ic
+ = case lookupIfaceByModName hit pit modname of
+ Nothing -> alwaysQualify
+ Just iface -> unQualInScope (mi_globals iface)
+ where
+ pit = pcs_PIT pcs
+ modname = moduleName (ic_module ic)
+
-----------------------------------------------------------------------------
-- cmTypeOfName: returns a string representing the type of a name.
cmTypeOfName CmState{ hit=hit, pcs=pcs, ic=ic } name
= case lookupNameEnv (ic_type_env ic) name of
Nothing -> return Nothing
- Just (AnId id) ->
- let pit = pcs_PIT pcs
- modname = moduleName (ic_module ic)
- ty = tidyType emptyTidyEnv (idType id)
- str = case lookupIfaceByModName hit pit modname of
- Nothing -> showSDoc (ppr ty)
- Just iface -> showSDocForUser unqual (ppr ty)
- where unqual = unQualInScope (mi_globals iface)
- in return (Just str)
+ Just (AnId id) -> return (Just str)
+ where
+ unqual = getUnqual pcs hit ic
+ ty = tidyType emptyTidyEnv (idType id)
+ str = showSDocForUser unqual (ppr ty)
_ -> panic "cmTypeOfName"
#endif
-- Unload the compilation manager's state: everything it knows about the
-- current collection of modules in the Home package.
-cmUnload :: CmState -> IO CmState
-cmUnload state
+cmUnload :: CmState -> DynFlags -> IO CmState
+cmUnload state@CmState{ gmode=mode, pls=pls, pcs=pcs } dflags
= do -- Throw away the old home dir cache
emptyHomeDirCache
- -- Throw away the HIT and the HST
- return state{ hst=new_hst, hit=new_hit, ui=emptyUI }
- where
- CmState{ hst=hst, hit=hit } = state
- (new_hst, new_hit) = retainInTopLevelEnvs [] (hst,hit)
+
+ -- Unload everything the linker knows about
+ new_pls <- CmLink.unload mode dflags [] pls
+
+ -- Start with a fresh CmState, but keep the PersistentCompilerState
+ new_state <- cmInit mode
+ return new_state{ pcs=pcs, pls=new_pls }
-----------------------------------------------------------------------------
-- The real business of the compilation manager: given a system state and
-- the system state at the same time.
cmLoadModule :: CmState
- -> FilePath
+ -> [FilePath]
-> IO (CmState, -- new state
Bool, -- was successful
[String]) -- list of modules loaded
-cmLoadModule cmstate1 rootname
+cmLoadModule cmstate1 rootnames
= do -- version 1's are the original, before downsweep
let pls1 = pls cmstate1
let pcs1 = pcs cmstate1
showPass dflags "Chasing dependencies"
when (verb >= 1 && ghci_mode == Batch) $
- hPutStrLn stderr (progName ++ ": chasing modules from: " ++ rootname)
+ hPutStrLn stderr (showSDoc (hcat [
+ text progName, text ": chasing modules from: ",
+ hcat (punctuate comma (map text rootnames))]))
- (mg2unsorted, a_root_is_Main) <- downsweep [rootname] mg1
+ (mg2unsorted, a_root_is_Main) <- downsweep rootnames mg1
let mg2unsorted_names = map name_of_summary mg2unsorted
-- reachable_from follows source as well as normal imports
-- See getValidLinkables below for details.
valid_linkables <- getValidLinkables ui1 mg2unsorted_names
mg2_with_srcimps
+ -- when (verb >= 2) $
+ -- putStrLn (showSDoc (text "Valid linkables:"
+ -- <+> ppr valid_linkables))
-- Figure out a stable set of modules which can be retained
-- the top level envs, to avoid upsweeping them. Goes to a
-- unload any modules which aren't going to be re-linked this
-- time around.
- pls2 <- unload ghci_mode dflags stable_linkables pls1
+ pls2 <- CmLink.unload ghci_mode dflags stable_linkables pls1
-- We could at this point detect cycles which aren't broken by
-- a source-import, and complain immediately, but it seems better
let threaded2 = CmThreaded pcs1 hst1 hit1
+ -- clean up between compilations
+ let cleanup = cleanTempFilesExcept verb
+ (ppFilesFromSummaries (flattenSCCs upsweep_these))
+
(upsweep_complete_success, threaded3, modsUpswept, newLis)
<- upsweep_mods ghci_mode dflags valid_linkables reachable_from
- threaded2 upsweep_these
+ threaded2 cleanup upsweep_these
let ui3 = add_to_ui valid_linkables newLis
let (CmThreaded pcs3 hst3 hit3) = threaded3
-- clean up after ourselves
cleanTempFilesExcept verb (ppFilesFromSummaries modsDone)
+ -- issue a warning for the confusing case where the user said '-o foo'
+ -- but we're not going to do any linking.
+ ofile <- readIORef v_Output_file
+ when (ghci_mode == Batch && isJust ofile && not a_root_is_Main
+ && verb > 0) $
+ hPutStrLn stderr "Warning: output was redirected with -o, but no output will be generated\nbecause there is no Main module."
+
-- link everything together
linkresult <- link ghci_mode dflags a_root_is_Main ui3 pls2
let mods_to_zap_names
= findPartiallyCompletedCycles modsDone_names
mg2_with_srcimps
- let (hst4, hit4, ui4)
- = removeFromTopLevelEnvs mods_to_zap_names (hst3,hit3,ui3)
-
let mods_to_keep
= filter ((`notElem` mods_to_zap_names).name_of_summary)
modsDone
+ let (hst4, hit4, ui4)
+ = retainInTopLevelEnvs (map name_of_summary mods_to_keep)
+ (hst3,hit3,ui3)
+
-- clean up after ourselves
cleanTempFilesExcept verb (ppFilesFromSummaries mods_to_keep)
-- Finish up after a cmLoad.
---
+
+-- If the link failed, unload everything and return.
+cmLoadFinish ok (LinkFailed pls) hst hit ui mods ghci_mode pcs = do
+ dflags <- getDynFlags
+ new_pls <- CmLink.unload ghci_mode dflags [] pls
+ new_state <- cmInit ghci_mode
+ return (new_state{ pcs=pcs, pls=new_pls }, False, [])
+
-- Empty the interactive context and set the module context to the topmost
-- newly loaded module, or the Prelude if none were loaded.
-cmLoadFinish ok linkresult hst hit ui mods ghci_mode pcs
- = do case linkresult of {
- LinkErrs _ _ -> panic "cmLoadModule: link failed (2)";
- LinkOK pls -> do
-
- def_mod <- readIORef defaultCurrentModule
+cmLoadFinish ok (LinkOK pls) hst hit ui mods ghci_mode pcs
+ = do def_mod <- readIORef defaultCurrentModule
let current_mod = case mods of
[] -> def_mod
(x:_) -> ms_mod x
new_ic = emptyInteractiveContext current_mod
- new_cmstate = CmState{ hst=hst, hit=hit,
- ui=ui, mg=mods,
- gmode=ghci_mode, pcs=pcs,
- pls=pls,
+ new_cmstate = CmState{ hst=hst, hit=hit, ui=ui, mg=mods,
+ gmode=ghci_mode, pcs=pcs, pls=pls,
ic = new_ic }
mods_loaded = map (moduleNameUserString.name_of_summary) mods
return (new_cmstate, ok, mods_loaded)
- }
+-- used to fish out the preprocess output files for the purposes
+-- of cleaning up.
ppFilesFromSummaries summaries
- = [ fn | Just fn <- map (ml_hspp_file . ms_location) summaries ]
+ = [ fn | Just fn <- map toPpFile summaries ]
+ where
+ toPpFile sum
+ | hspp /= ml_hs_file loc = hspp
+ | otherwise = Nothing
+ where
+ loc = ms_location sum
+ hspp = ml_hspp_file loc
+
-----------------------------------------------------------------------------
-- getValidLinkables
scc = flattenSCC scc0
scc_names = map name_of_summary scc
home_module m = m `elem` all_home_mods && m `notElem` scc_names
- scc_allhomeimps = nub (filter home_module (concatMap ms_allimps scc))
+ scc_allhomeimps = nub (filter home_module (concatMap ms_imps scc))
+ -- NOTE: ms_imps, not ms_allimps above. We don't want to
+ -- force a module's SOURCE imports to be already compiled for
+ -- its object linkable to be valid.
has_object m = case findModuleLinkable_maybe new_linkables m of
Nothing -> False
Just l | not (isObjectLinkable l) || stillThere l
-> old_linkable
-- ToDo: emit a warning if not (stillThere l)
- | otherwise
- -> Nothing
+ other -> Nothing
-- make sure that if we had an old disk linkable around, that it's
-- still there on the disk (in case we need to re-link it).
src_date = ms_hs_date summary
valid_linkable
- = filter (\l -> linkableTime l > src_date) linkable
+ = filter (\l -> linkableTime l >= src_date) linkable
+ -- why '>=' rather than '>' above? If the filesystem stores
+ -- times to the nearset second, we may occasionally find that
+ -- the object & source have the same modification time,
+ -- especially if the source was automatically generated
+ -- and compiled. Using >= is slightly unsafe, but it matches
+ -- make's behaviour.
return (valid_linkable ++ new_linkables)
-
maybe_getFileLinkable :: ModuleName -> FilePath -> IO (Maybe Linkable)
maybe_getFileLinkable mod_name obj_fn
= do obj_exist <- doesFileExist obj_fn
-> UnlinkedImage -- valid linkables
-> (ModuleName -> [ModuleName]) -- to construct downward closures
-> CmThreaded -- PCS & HST & HIT
+ -> IO () -- how to clean up unwanted tmp files
-> [SCC ModSummary] -- mods to do (the worklist)
-- ...... RETURNING ......
-> IO (Bool{-complete success?-},
[ModSummary], -- mods which succeeded
[Linkable]) -- new linkables
-upsweep_mods ghci_mode dflags oldUI reachable_from threaded
+upsweep_mods ghci_mode dflags oldUI reachable_from threaded cleanup
[]
= return (True, threaded, [], [])
-upsweep_mods ghci_mode dflags oldUI reachable_from threaded
+upsweep_mods ghci_mode dflags oldUI reachable_from threaded cleanup
((CyclicSCC ms):_)
= do hPutStrLn stderr ("Module imports form a cycle for modules:\n\t" ++
unwords (map (moduleNameUserString.name_of_summary) ms))
return (False, threaded, [], [])
-upsweep_mods ghci_mode dflags oldUI reachable_from threaded
+upsweep_mods ghci_mode dflags oldUI reachable_from threaded cleanup
((AcyclicSCC mod):mods)
= do --case threaded of
-- CmThreaded pcsz hstz hitz
(threaded1, maybe_linkable)
<- upsweep_mod ghci_mode dflags oldUI threaded mod
(reachable_from (name_of_summary mod))
+
+ -- remove unwanted tmp files between compilations
+ cleanup
+
case maybe_linkable of
Just linkable
-> -- No errors; do the rest
do (restOK, threaded2, modOKs, linkables)
<- upsweep_mods ghci_mode dflags oldUI reachable_from
- threaded1 mods
+ threaded1 cleanup mods
return (restOK, threaded2, mod:modOKs, linkable:linkables)
Nothing -- we got a compilation error; give up now
-> return (False, threaded1, [], [])
-- in interactive mode, all home modules below us *must* have an
-- interface in the HIT. We never demand-load home interfaces in
-- interactive mode.
- (hst1_strictDC, hit1_strictDC)
+ (hst1_strictDC, hit1_strictDC, [])
= ASSERT(ghci_mode == Batch ||
all (`elemUFM` hit1) reachable_only)
- retainInTopLevelEnvs reachable_only (hst1,hit1)
+ retainInTopLevelEnvs reachable_only (hst1,hit1,[])
old_linkable
= unJust "upsweep_mod:old_linkable" maybe_old_linkable
-> do let threaded2 = CmThreaded pcs2 hst1 hit1
return (threaded2, Nothing)
--- Remove unwanted modules from the top level envs (HST, HIT, UI).
-removeFromTopLevelEnvs :: [ModuleName]
- -> (HomeSymbolTable, HomeIfaceTable, UnlinkedImage)
- -> (HomeSymbolTable, HomeIfaceTable, UnlinkedImage)
-removeFromTopLevelEnvs zap_these (hst, hit, ui)
- = (delListFromUFM hst zap_these,
- delListFromUFM hit zap_these,
- filterModuleLinkables (`notElem` zap_these) ui
- )
-
+-- Filter modules in the top level envs (HST, HIT, UI).
retainInTopLevelEnvs :: [ModuleName]
- -> (HomeSymbolTable, HomeIfaceTable)
- -> (HomeSymbolTable, HomeIfaceTable)
-retainInTopLevelEnvs keep_these (hst, hit)
+ -> (HomeSymbolTable, HomeIfaceTable, UnlinkedImage)
+ -> (HomeSymbolTable, HomeIfaceTable, UnlinkedImage)
+retainInTopLevelEnvs keep_these (hst, hit, ui)
= (retainInUFM hst keep_these,
- retainInUFM hit keep_these
+ retainInUFM hit keep_these,
+ filterModuleLinkables (`elem` keep_these) ui
)
where
retainInUFM :: Uniquable key => UniqFM elt -> [key] -> UniqFM elt
res = simple_transitive_closure (map toEdge summaries) [root]
in
- --trace (showSDoc (text "DC of mod" <+> ppr root
- -- <+> text "=" <+> ppr res)) (
+-- trace (showSDoc (text "DC of mod" <+> ppr root
+-- <+> text "=" <+> ppr res)) $
res
- --)
-- Calculate transitive closures from a set of roots given an adjacency list
simple_transitive_closure :: Eq a => [(a,[a])] -> [a] -> [a]
where
getRootSummary :: FilePath -> IO ModSummary
getRootSummary file
- | haskellish_file file
+ | haskellish_src_file file
= do exists <- doesFileExist file
if exists then summariseFile file else do
throwDyn (CmdLineError ("can't find file `" ++ file ++ "'"))
summariseFile :: FilePath -> IO ModSummary
summariseFile file
= do hspp_fn <- preprocess file
- modsrc <- readFile hspp_fn
+ (srcimps,imps,mod_name) <- getImportsFromFile hspp_fn
- let (srcimps,imps,mod_name) = getImports modsrc
- (path, basename, ext) = splitFilename3 file
+ let (path, basename, ext) = splitFilename3 file
- Just (mod, location)
+ (mod, location)
<- mkHomeModuleLocn mod_name (path ++ '/':basename) file
-
+
src_timestamp
<- case ml_hs_file location of
Nothing -> noHsFileErr mod_name
summarise :: Module -> ModuleLocation -> Maybe ModSummary
-> IO (Maybe ModSummary)
summarise mod location old_summary
- | isHomeModule mod
+ | not (isHomeModule mod) = return Nothing
+ | otherwise
= do let hs_fn = unJust "summarise" (ml_hs_file location)
- src_timestamp
- <- case ml_hs_file location of
- Nothing -> noHsFileErr mod
- Just src_fn -> getModificationTime src_fn
+ case ml_hs_file location of {
+ Nothing -> noHsFileErr mod;
+ Just src_fn -> do
+
+ src_timestamp <- getModificationTime src_fn
-- return the cached summary if the source didn't change
case old_summary of {
_ -> do
hspp_fn <- preprocess hs_fn
- modsrc <- readFile hspp_fn
- let (srcimps,imps,mod_name) = getImports modsrc
+ (srcimps,imps,mod_name) <- getImportsFromFile hspp_fn
when (mod_name /= moduleName mod) $
throwDyn (ProgramError
- (showSDoc (text modsrc
+ (showSDoc (text hs_fn
<> text ": file name does not match module name"
<+> quotes (ppr (moduleName mod)))))
return (Just (ModSummary mod location{ml_hspp_file=Just hspp_fn}
srcimps imps src_timestamp))
}
+ }
- | otherwise = return Nothing
noHsFileErr mod
- = panic (showSDoc (text "no source file for module" <+> quotes (ppr mod)))
+ = throwDyn (CmdLineError (showSDoc (text "no source file for module" <+> quotes (ppr mod))))
packageModErr mod
= throwDyn (CmdLineError (showSDoc (text "module" <+>
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