James E. King III created THRIFT-4634:
-----------------------------------------
Summary: Haskell builds with older cabal cannot reconcile complex
version requirements
Key: THRIFT-4634
URL: https://issues.apache.org/jira/browse/THRIFT-4634
Project: Thrift
Issue Type: Bug
Components: Haskell - Library
Affects Versions: 0.11.0
Reporter: James E. King III
Assignee: James E. King III
The cabal version in Ubuntu Xenial is 1.22.6.0 and it has been failing on CI
since HTTP-4000 changed to allow "network < 2.8" - the resulting output is:
```
root@48ae26f5e4f3:/thrift/src/lib/hs# make
/usr/bin/cabal update
Downloading the latest package list from hackage.haskell.org
Skipping download: Local and remote files match.
/usr/bin/cabal install
Resolving dependencies...
cabal: Could not resolve dependencies:
trying: thrift-1.0.0 (user goal)
trying: network-2.8.0.0 (dependency of thrift-1.0.0)
trying: HTTP-4000.3.12 (dependency of thrift-1.0.0)
trying: HTTP-4000.3.12:-conduit10
trying: HTTP-4000.3.12:-mtl1
rejecting: HTTP-4000.3.12:+network-uri (conflict: network==2.8.0.0,
HTTP-4000.3.12:network-uri => network>=2.6 && <2.8)
rejecting: HTTP-4000.3.12:-network-uri (conflict: network==2.8.0.0,
HTTP-4000.3.12:network-uri => network>=2.2.1.8 && <2.6)
Backjump limit reached (change with --max-backjumps).
Makefile:639: recipe for target 'all-local' failed
make: *** [all-local] Error 1
```
thrift has no direct dependency on network 2.8.0.0 - why it is being selected
first is beyond me. It should back off to 2.7.0.2 once it sees the network-uri
set of dependencies. It looks like the cabal in Ubuntu Bionic doesn't have
this problem.
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