May I ask the community for some advice? Any help gratefully received! I am trying to build a development version of Stack on Windows 11 (with the most recent version of Stack). The stack.yaml looks like this (extract):
# GHC 9.2.4
resolver: nightly-2022-08-02
packages:
- .
extra-deps:
# GHC 9.2.4 comes with process-1.6.13.2, which lacks important bug fixes
- process-1.6.15.0@sha256:04df32d9497add5f0b90a27a3eceffa4bad5c2f41d038bd12ed6efc454db3faf,2845
# Although Cabal-3.6.3.0 is a global package, it depends on process
- Cabal-3.6.3.0@sha256:ff97c442b0c679c1c9876acd15f73ac4f602b973c45bde42b43ec28265ee48f4,12459
However, Stack warns that ghc-9.2.4 requires process-1.6.13.2 when everything else requires the later version of process specified as the extra-dep:
Configuring stack-2.7.6...
Warning:
This package indirectly depends on multiple versions of the same package. This is very likely to cause a compile failure.
package ghc (ghc-9.2.4) requires process-1.6.13.2
package x509-system (x509-system-1.6.7-7LYzOCd9hiNIn35Hqv3YXA) requires process-1.6.15.0-7YgH4mi6Un42svYTH51yc2
package unliftio (unliftio-0.2.22.0-7aYpCdlZTd1BzG1ifowgpt) requires process-1.6.15.0-7YgH4mi6Un42svYTH51yc2
package typed-process (typed-process-0.2.10.1-FV0C3Zh991v5GT9YjSz5pl) requires process-1.6.15.0-7YgH4mi6Un42svYTH51yc2
package streaming-commons (streaming-commons-0.2.2.4-KtmwozH1ldC8lnHURqK8C2) requires process-1.6.15.0-7YgH4mi6Un42svYTH51yc2
package stack (stack-2.7.6) requires process-1.6.15.0-7YgH4mi6Un42svYTH51yc2
package stack (stack-2.7.6) requires process-1.6.15.0-7YgH4mi6Un42svYTH51yc2
package stack (stack-2.7.6) requires process-1.6.15.0-7YgH4mi6Un42svYTH51yc2
package rio (rio-0.1.22.0-6qv51ExpTspEeSYseBxuU) requires process-1.6.15.0-7YgH4mi6Un42svYTH51yc2
package optparse-applicative (optparse-applicative-0.17.0.0-6hi8JPLpPLD1aZipMKph2m) requires process-1.6.15.0-7YgH4mi6Un42svYTH51yc2
package open-browser (open-browser-0.2.1.0-Hx2fhcq8KXi5DdArbLJWf2) requires process-1.6.15.0-7YgH4mi6Un42svYTH51yc2
package githash (githash-0.1.6.2-CkgAgnMvOhZECxJhAOTkzx) requires process-1.6.15.0-7YgH4mi6Un42svYTH51yc2
package extra (extra-1.7.10-80tfFluQ9OuFuixnOGESj2) requires process-1.6.15.0-7YgH4mi6Un42svYTH51yc2
package echo (echo-0.1.4-1mVZySbMSwvEtxj6Ny0jYa) requires process-1.6.15.0-7YgH4mi6Un42svYTH51yc2
package conduit-extra (conduit-extra-1.3.6-BvfbgHagiCHEiVJWoGyx2L) requires process-1.6.15.0-7YgH4mi6Un42svYTH51yc2
package Cabal (Cabal-3.6.3.0-LgIQysZm0PdEegNtbZi2E8) requires process-1.6.15.0-7YgH4mi6Un42svYTH51yc2
and stack test eventually fails (part way through building the stack-test test suite - EDIT: I should add, stack.exe itself builds without complaint) with:
GHC runtime linker: fatal error: I found a duplicate definition for symbol
mkNamedPipe
whilst processing object file
C:\Users\mike\AppData\Local\Programs\stack\x86_64-windows\ghc-9.2.4\lib\x86_64-windows-ghc-9.2.4\process-1.6.13.2\HSprocess-1.6.13.2.o
The symbol was previously defined in
C:\sr\snapshots\5ed2aec8\lib\x86_64-windows-ghc-9.2.4\process-1.6.15.0-7YgH4mi6Un42svYTH51yc2\HSprocess-1.6.15.0-7YgH4mi6Un42svYTH51yc2.o
This could be caused by:
* Loading two different object files which export the same symbol
* Specifying the same object file twice on the GHCi command line
* An incorrect `package.conf' entry, causing some object to be
loaded twice.
ghc-9.2.4.exe: panic! (the 'impossible' happened)
(GHC version 9.2.4:
loadObj "C:\\Users\\mike\\AppData\\Local\\Programs\\stack\\x86_64-windows\\ghc-9.2.4\\lib\\x86_64-windows-ghc-9.2.4\\process-1.6.13.2\\HSprocess-1.6.13.2.o": failed
Please report this as a GHC bug: https://www.haskell.org/ghc/reportabug
This is my question: why would Stack think that ghc-9.2.4 requires process-1.6.13.2? The ghc.cabal for ghc-9.2.4 says process >= 1 && < 1.7.
In case it was a ‘past build artefact’ somewhere, I deleted first my Stack root, GHC 9.2.4 and the .stack-work directory. Same result.