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Я работаю над простым проектом Haskell, который до сих пор компилировался нормально. Друг внес некоторые изменения с помощью subversion, чтобы что-то протестировать, и теперь ghc останавливается на этапе компоновки. Я проверил подробный параметр, и, похоже, он зависает при «Удалении временных каталогов» после связывания. Даже после отмены изменений моего друга это замедление все еще происходит. Полная трассировка:

  Glasgow Haskell Compiler, Version 8.6.5, stage 2 booted by GHC version 8.6.3
Using binary package database: /Users/maincomp/.ghcup/ghc/8.6.5/lib/ghc-8.6.5/package.conf.d/package.cache
package flags []
loading package database /Users/maincomp/.ghcup/ghc/8.6.5/lib/ghc-8.6.5/package.conf.d
wired-in package ghc-prim mapped to ghc-prim-0.5.3
wired-in package integer-gmp mapped to integer-gmp-1.0.2.0
wired-in package base mapped to base-4.12.0.0
wired-in package rts mapped to rts
wired-in package template-haskell mapped to template-haskell-2.14.0.0
wired-in package ghc mapped to ghc-8.6.5
package flags []
loading package database /Users/maincomp/.ghcup/ghc/8.6.5/lib/ghc-8.6.5/package.conf.d
wired-in package ghc-prim mapped to ghc-prim-0.5.3
wired-in package integer-gmp mapped to integer-gmp-1.0.2.0
wired-in package base mapped to base-4.12.0.0
wired-in package rts mapped to rts-1.0
wired-in package template-haskell mapped to template-haskell-2.14.0.0
wired-in package ghc mapped to ghc-8.6.5
*** Chasing dependencies:
Chasing modules from: *Test/CalcTests.hs
!!! Chasing dependencies: finished in 1.46 milliseconds, allocated 0.722 megabytes
Stable obj: [ESf6z :-> Src.Calc, ESf6D :-> Main]
Stable BCO: []
Ready for upsweep
  [NONREC
      ModSummary {
         ms_hs_date = 2020-09-29 22:32:36.870126817 UTC
         ms_mod = Src.Calc,
         ms_textual_imps = [(Nothing, Prelude)]
         ms_srcimps = []
      },
   NONREC
      ModSummary {
         ms_hs_date = 2020-09-29 22:33:01.447304406 UTC
         ms_mod = Main,
         ms_textual_imps = [(Nothing, Prelude), (Nothing, System.IO),
                            (Nothing, System.Exit), (Nothing, Src.Calc)]
         ms_srcimps = []
      }]
*** Deleting temp files:
Deleting: 
compile: input file ./Src/Calc.hs
*** Checking old interface for Src.Calc (use -ddump-hi-diffs for more details):
[1 of 2] Skipping  Src.Calc    ( Src/Calc.hs, Src/Calc.o )
*** Deleting temp files:
Deleting: 
compile: input file Test/CalcTests.hs
*** Checking old interface for Main (use -ddump-hi-diffs for more details):
[2 of 2] Skipping  Main             ( Test/CalcTests.hs, Test/CalcTests.o )
Upsweep completely successful.
*** Deleting temp files:
Deleting: 
link: linkables are ...
LinkableM (2020-09-29 22:39:10.279253082 UTC) Src.Calc
   [DotO ./Src/Calc.o]
LinkableM (2020-09-29 22:39:12.122642619 UTC) Main
   [DotO Test/CalcTests.o]
Test/CalcTests is up to date, linking not required.
*** Deleting temp files:
Deleting: 
*** Deleting temp dirs:
Deleting: 
  

Есть какие-нибудь гуру ghc, разбирающиеся в этом?