Hedgehog found a counterexample in `prop packet fifo id`

[DigitalBrains1]

$ git status
On branch main
Your branch is up to date with 'origin/main'.

nothing to commit, working tree clean
$ ghc --version
The Glorious Glasgow Haskell Compilation System, version 9.6.6
$ cabal v2-run clash-protocols:unittests -- --pattern '$NF ~ /prop packet fifo id/' --hedgehog-replay '196:bEhPz8BB6hZ3bb12Hz10BB2h3S12hIdA2bGPgv Seed 6375259335271169919 17161120250667971335'
[...]
Tests
  Protocols
    PacketStream
      Tests.Protocols.PacketStream.PacketFifo
        prop packet fifo id: FAIL (0.09s)
            ✗ prop_packet fifo id failed at src/Protocols/Hedgehog.hs:248:59
              after 196 tests and 70 shrinks.
[...]

Full output

$ git status
On branch main
Your branch is up to date with 'origin/main'.

nothing to commit, working tree clean
$ ghc --version
The Glorious Glasgow Haskell Compilation System, version 9.6.6
$ cabal v2-run clash-protocols:unittests -- --pattern '$NF ~ /prop packet fifo id/' --hedgehog-replay '196:bEhPz8BB6hZ3bb12Hz10BB2h3S12hIdA2bGPgv Seed 6375259335271169919 17161120250667971335'
Configuration is affected by the following files:
- cabal.project
- cabal.project.local
Tests
  Protocols
    PacketStream
      Tests.Protocols.PacketStream.PacketFifo
        prop packet fifo id: FAIL (0.09s)
            ✗ prop_packet fifo id failed at src/Protocols/Hedgehog.hs:248:59
              after 196 tests and 70 shrinks.
              shrink path: 196:bEhPz8BB6hZ3bb12Hz10BB2h3S12hIdA2bGPgv
            
              forAll0 =
                ( StallWithNack , [] ) :> Nil
              
              forAll1 =
                NoStall :> Nil
              
              forAll2 =
                ( StallWithNack
                , [ 10
                  , 0
                  , 10
                  , 0
                  , 9
                  , 6
                  , 2
                  , 2
                  , 3
                  , 2
                  , 7
                  , 5
                  , 4
                  , 6
                  , 6
                  , 4
                  , 1
                  , 6
                  , 0
                  , 0
                  , 5
                  , 9
                  , 6
                  , 3
                  , 3
                  , 7
                  , 8
                  , 9
                  , 8
                  , 4
                  , 6
                  , 2
                  , 9
                  , 3
                  , 3
                  , 6
                  , 0
                  , 10
                  , 2
                  ]
                ) :>
                  Nil
              
              forAll3 =
                Stall :> Nil
              
              forAll4 =
                39
              
              forAll5 =
                [PacketStreamM2S {_data = 0b0000_0000 :> Nil, _last = Nothing, _meta = -32768, _abort = False},PacketStreamM2S {_data = 0b0000_0000 :> Nil, _last = Nothing, _meta = -32768, _abort = False},PacketStreamM2S {_data = 0b0000_0000 :> Nil, _last = Nothing, _meta = -32768, _abort = False},PacketStreamM2S {_data = 0b0000_0000 :> Nil, _last = Nothing, _meta = -32768, _abort = False},PacketStreamM2S {_data = 0b0000_0000 :> Nil, _last = Nothing, _meta = -32768, _abort = False},PacketStreamM2S {_data = 0b0000_0000 :> Nil, _last = Nothing, _meta = -32768, _abort = True},PacketStreamM2S {_data = 0b0000_0000 :> Nil, _last = Nothing, _meta = -32768, _abort = False},PacketStreamM2S {_data = 0b0000_0000 :> Nil, _last = Nothing, _meta = -32768, _abort = False},PacketStreamM2S {_data = 0b0000_0000 :> Nil, _last = Nothing, _meta = -32768, _abort = False},PacketStreamM2S {_data = 0b...._.... :> Nil, _last = Just 0, _meta = -32768, _abort = False},PacketStreamM2S {_data = 0b0000_0000 :> Nil, _last = Nothing, _meta = -32768, _abort = False},PacketStreamM2S {_data = 0b0000_0000 :> Nil, _last = Nothing, _meta = -32768, _abort = True},PacketStreamM2S {_data = 0b0000_0000 :> Nil, _last = Nothing, _meta = -32768, _abort = False},PacketStreamM2S {_data = 0b0000_0000 :> Nil, _last = Nothing, _meta = -32768, _abort = False},PacketStreamM2S {_data = 0b0000_0000 :> Nil, _last = Nothing, _meta = -32768, _abort = False},PacketStreamM2S {_data = 0b0000_0000 :> Nil, _last = Nothing, _meta = -32768, _abort = False},PacketStreamM2S {_data = 0b0000_0000 :> Nil, _last = Nothing, _meta = -32768, _abort = False},PacketStreamM2S {_data = 0b0000_0000 :> Nil, _last = Nothing, _meta = -32768, _abort = False},PacketStreamM2S {_data = 0b0000_0000 :> Nil, _last = Nothing, _meta = -32768, _abort = False},PacketStreamM2S {_data = 0b...._.... :> Nil, _last = Just 0, _meta = -32768, _abort = False},PacketStreamM2S {_data = 0b0000_0000 :> Nil, _last = Nothing, _meta = -32768, _abort = False},PacketStreamM2S {_data = 0b0000_0000 :> Nil, _last = Nothing, _meta = -32768, _abort = False},PacketStreamM2S {_data = 0b0000_0000 :> Nil, _last = Nothing, _meta = -32768, _abort = False},PacketStreamM2S {_data = 0b0000_0000 :> Nil, _last = Nothing, _meta = -32768, _abort = False},PacketStreamM2S {_data = 0b0000_0000 :> Nil, _last = Nothing, _meta = -32768, _abort = False},PacketStreamM2S {_data = 0b0000_0000 :> Nil, _last = Nothing, _meta = -32768, _abort = False},PacketStreamM2S {_data = 0b0000_0000 :> Nil, _last = Nothing, _meta = -32768, _abort = False},PacketStreamM2S {_data = 0b0000_0000 :> Nil, _last = Nothing, _meta = -32768, _abort = False},PacketStreamM2S {_data = 0b0000_0000 :> Nil, _last = Nothing, _meta = -32768, _abort = True},PacketStreamM2S {_data = 0b0000_0000 :> Nil, _last = Nothing, _meta = -32768, _abort = False},PacketStreamM2S {_data = 0b...._.... :> Nil, _last = Just 0, _meta = -32768, _abort = False},PacketStreamM2S {_data = 0b0000_0000 :> Nil, _last = Nothing, _meta = -32768, _abort = False},PacketStreamM2S {_data = 0b0000_0000 :> Nil, _last = Nothing, _meta = -32768, _abort = False},PacketStreamM2S {_data = 0b0000_0000 :> Nil, _last = Nothing, _meta = -32768, _abort = False},PacketStreamM2S {_data = 0b0000_0000 :> Nil, _last = Nothing, _meta = -32768, _abort = False},PacketStreamM2S {_data = 0b0000_0000 :> Nil, _last = Nothing, _meta = -32768, _abort = False},PacketStreamM2S {_data = 0b0000_0000 :> Nil, _last = Nothing, _meta = -32768, _abort = False},PacketStreamM2S {_data = 0b0000_0000 :> Nil, _last = Nothing, _meta = -32768, _abort = False},PacketStreamM2S {_data = 0b...._.... :> Nil, _last = Just 0, _meta = -32768, _abort = False}]
            
              Failed
              ━━ lhs ━━
              [PacketStreamM2S {_data = 0b0000_0000 :> Nil, _last = Nothing, _meta = -32768, _abort = False},PacketStreamM2S {_data = 0b0000_0000 :> Nil, _last = Nothing, _meta = -32768, _abort = False},PacketStreamM2S {_data = 0b0000_0000 :> Nil, _last = Nothing, _meta = -32768, _abort = False},PacketStreamM2S {_data = 0b0000_0000 :> Nil, _last = Nothing, _meta = -32768, _abort = False},PacketStreamM2S {_data = 0b0000_0000 :> Nil, _last = Nothing, _meta = -32768, _abort = False},PacketStreamM2S {_data = 0b0000_0000 :> Nil, _last = Nothing, _meta = -32768, _abort = False},PacketStreamM2S {_data = 0b0000_0000 :> Nil, _last = Nothing, _meta = -32768, _abort = False},PacketStreamM2S {_data = 0b...._.... :> Nil, _last = Just 0, _meta = -32768, _abort = False}]
              ━━ rhs ━━
              []
            
              This failure can be reproduced by running:
              > recheckAt (Seed 6375259335271169919 17161120250667971335) "196:bEhPz8BB6hZ3bb12Hz10BB2h3S12hIdA2bGPgv" prop_packet fifo id
            
          Use "--pattern '$NF ~ /prop packet fifo id/' --hedgehog-replay '196:bEhPz8BB6hZ3bb12Hz10BB2h3S12hIdA2bGPgv Seed 6375259335271169919 17161120250667971335'" to reproduce from the command-line.

Rowan wrote:

I expect it's because of the massive amounts of stalls.
That it just doesn't get around to sending data and times out.
Could you make an issue with this text (and critically the seed). I can take a look later

[DigitalBrains1]

Just hit it again... probably the same thing.

Use "--pattern '$NF ~ /prop packet fifo id/' --hedgehog-replay '392:fHeHkWy11Hq8Sh2Z7bb7H2s12HiCa2CZcrCQ3cxCQcsCQdkCReaCQ3geCS37 Seed 2132738277759105175 4731842780066325247'" to reproduce from the command-line.

[edit]
It actually keeps happening, it's not a rare occurence at all... I'll add one more, but I'll stop reporting every new occurence now.

Use "--pattern '$NF ~ /prop packet fifo id/' --hedgehog-replay '394:hDhZ13jBB3bd12J2q3S3jY13jMa3BctDKctCVdiCTemCVgh Seed 9792381140106345749 13621255186710998925'" to reproduce from the command-line.

[/edit]