Core: Runtime error (TypeError: Cannot read property 'height' of undefined) Array cannot shuffle a poker deck more than once.

[Pilatch]

Try it out for yourself - https://github.com/Pilatch/elm-array-shuffle-runtime-error-demonstration

    ./run.sh
    Success! Compiled 1 module.
    Successfully generated /var/folders/62/l5yyw47972g_51fgh99mggy4r_cqvv/T/elm_test_1161119-2066-3ag687.i3rr418aor.js

    elm-test
    --------

    Running 1 test. To reproduce these results, run: elm-test --seed 1047907805

    Unhandled exception while running the tests: TypeError: Cannot read property 'height' of undefined
        at length (eval at <anonymous> (/usr/local/opt/nvm/versions/node/v6.3.0/lib/node_modules/elm-test/bin/elm-test:119:37), <anonymous>:6127:11)
        at sliceLeft (eval at <anonymous> (/usr/local/opt/nvm/versions/node/v6.3.0/lib/node_modules/elm-test/bin/elm-test:119:37), <anonymous>:5805:10)
        at Function.slice [as func] (eval at <anonymous> (/usr/local/opt/nvm/versions/node/v6.3.0/lib/node_modules/elm-test/bin/elm-test:119:37), <anonymous>:5726:9)
        at A3 (eval at <anonymous> (/usr/local/opt/nvm/versions/node/v6.3.0/lib/node_modules/elm-test/bin/elm-test:119:37), <anonymous>:98:11)
        at Function.eval (eval at <anonymous> (/usr/local/opt/nvm/versions/node/v6.3.0/lib/node_modules/elm-test/bin/elm-test:119:37), <anonymous>:12834:15)
        at A2 (eval at <anonymous> (/usr/local/opt/nvm/versions/node/v6.3.0/lib/node_modules/elm-test/bin/elm-test:119:37), <anonymous>:92:11)
        at Function.eval (eval at <anonymous> (/usr/local/opt/nvm/versions/node/v6.3.0/lib/node_modules/elm-test/bin/elm-test:119:37), <anonymous>:12896:15)
        at A3 (eval at <anonymous> (/usr/local/opt/nvm/versions/node/v6.3.0/lib/node_modules/elm-test/bin/elm-test:119:37), <anonymous>:98:11)
        at Function.eval (eval at <anonymous> (/usr/local/opt/nvm/versions/node/v6.3.0/lib/node_modules/elm-test/bin/elm-test:119:37), <anonymous>:12916:10)
        at A2 (eval at <anonymous> (/usr/local/opt/nvm/versions/node/v6.3.0/lib/node_modules/elm-test/bin/elm-test:119:37), <anonymous>:92:11)
    Modify Library/PerformanceTest/ShuffleTests.elm
    to switch between Array implementations, and number of shuffles.
    See the comments near the top of that file.

[process-bot]

Thanks for the issue! Make sure it satisfies this checklist. My human colleagues will appreciate it!

Here is what to expect next, and if anyone wants to comment, keep these things in mind.

[Pilatch]

elm -v
0.18.0

[mgold]

Array is known to be broken. Use this library instead.

[Pilatch]

http://package.elm-lang.org/packages/elm-lang/core/latest/Array should at least say it's deprecated or have a warning or _something_.

[turboMaCk]

see https://github.com/elm-lang/core/issues/649 and https://github.com/elm-lang/core/pull/765

[evancz]

Without an SCCEE I'm not sure the root thing you are running in to, but it is now tracked in #649.