Add --max-backjumps to .travis.yml

[phadej]

No description provided.

[phadej]

Configuring library for warp-3.2.13..
Preprocessing library for warp-3.2.13..
Building library for warp-3.2.13..
Network/Wai/Handler/Warp/Response.hs:45:8:
    Could not find module ‘Data.Streaming.Blaze’
    Perhaps you meant
      Data.Streaming.Zlib (from streaming-commons-0.2.0.0)
      Data.Streaming.Text (from streaming-commons-0.2.0.0)
    Use -v to see a list of the files searched for.
cabal: Failed to build warp-3.2.13 (which is required by test:spec from

[jkarni]

Yeah, I started seeing this yesterday too, after a cabal update. Looks like a new version of streaming-commons was released without the module, and I guess later versions of warp don't use it?

I'm 👍 on this, though I've been wondering, what's the usual way of making cabal's life easier (without increasing max-backjumps)? Is it to just have fewer dependencies and narrower version ranges?

[phadej]

In fact in this case also --reorder-goals helps solver to find a valid install plan.

[jkarni]

Opened an issue here.