Does not compile with OTP 19.0

[duics]

Hey,

it seems like the build fails on OTP 19.0 (regardless of Elixir version). This can easily be averted by using OTP 18.0, but it would be nice to come up with a more future-proof solution.

== Compilation error on file web/router.ex ==
** (CompileError) web/router.ex: internal error in v3_core;
crash reason: {case_clause,
    {'EXIT',
        {badarg,
            [{erl_anno,anno_info,[-1],[{file,"erl_anno.erl"},{line,360}]},
             {v3_core,record_anno,2,[{file,"v3_core.erl"},{line,2410}]},
             {v3_core,expr,2,[{file,"v3_core.erl"},{line,539}]},
             {v3_core,safe,2,[{file,"v3_core.erl"},{line,1593}]},
             {v3_core,expr,2,[{file,"v3_core.erl"},{line,528}]},
             {v3_core,safe,2,[{file,"v3_core.erl"},{line,1593}]},
             {v3_core,'-safe_list/2-anonymous-0-',2,
                 [{file,"v3_core.erl"},{line,1608}]},
             {lists,foldr,3,[{file,"lists.erl"},{line,1276}]},
             {v3_core,expr,2,[{file,"v3_core.erl"},{line,538}]},
             {v3_core,safe,2,[{file,"v3_core.erl"},{line,1593}]},
             {v3_core,'-safe_list/2-anonymous-0-',2,
                 [{file,"v3_core.erl"},{line,1608}]},
             {lists,foldr,3,[{file,"lists.erl"},{line,1276}]},
             {v3_core,expr,2,[{file,"v3_core.erl"},{line,538}]},
             {v3_core,safe,2,[{file,"v3_core.erl"},{line,1593}]},
             {v3_core,expr,2,[{file,"v3_core.erl"},{line,528}]},
             {v3_core,safe,2,[{file,"v3_core.erl"},{line,1593}]},
             {v3_core,'-safe_list/2-anonymous-0-',2,
                 [{file,"v3_core.erl"},{line,1608}]},
             {lists,foldr,3,[{file,"lists.erl"},{line,1276}]},
             {v3_core,expr,2,[{file,"v3_core.erl"},{line,652}]},
             {v3_core,exprs,2,[{file,"v3_core.erl"},{line,512}]}]}}}

  in function  compile:'-select_passes/2-anonymous-2-'/2 (compile.erl, line 530)
  in call from compile:'-internal_comp/4-anonymous-1-'/2 (compile.erl, line 315)
  in call from compile:fold_comp/3 (compile.erl, line 341)
  in call from compile:internal_comp/4 (compile.erl, line 325)
  in call from compile:'-do_compile/2-anonymous-0-'/2 (compile.erl, line 175)
    (stdlib) lists.erl:1338: :lists.foreach/2
    (phoenix) expanding macro: Phoenix.Router.__before_compile__/1
    web/router.ex:1: Visualixir.Router (module)
    (elixir) lib/kernel/parallel_compiler.ex:116: anonymous fn/4 in Kernel.ParallelCompiler.spawn_compilers/1

[koudelka]

Hey @duics, thanks for letting me know. I haven't had as much time as I'd like to work on the project recently.

Let me know if you have any further issues. :)