Improve error message when type uses old Tuple format

[dlfivefifty]

I spent days tracking down a bug, which turned out to be due to the (S,V) instead of Tuple{S,V} in a type definition:

immutable KroneckerOperator{S,V,DS,RS,T}<: BivariateOperator{T}
ops::(S,V)
domainspace::DS
rangespace::RS
end

The error message gave no hint that the issue was inside KroneckerOperator: it appeared while trying to compile a function that didn't have anything to do with KroneckerOperator. Here is the error message.

TypeError: subtype: expected Type{T}, got Tuple{TypeVar,TypeVar}
in abstract_call_gf at ./inference.jl:586
in abstract_call at ./inference.jl:857
in abstract_eval_call at ./inference.jl:904
in abstract_eval at ./inference.jl:931
in abstract_eval_call at ./inference.jl:881
in abstract_eval at ./inference.jl:931
in abstract_eval_call at ./inference.jl:881
in abstract_eval at ./inference.jl:931
in typeinf_uncached at ./inference.jl:1591
in typeinf at ./inference.jl:1307
in typeinf at ./inference.jl:1257
in abstract_call_gf at ./inference.jl:696
in abstract_call at ./inference.jl:857
in abstract_eval_call at ./inference.jl:904
in abstract_eval at ./inference.jl:931
in abstract_eval_call at ./inference.jl:881
in abstract_eval at ./inference.jl:931
in typeinf_uncached at ./inference.jl:1591
in typeinf at ./inference.jl:1307
in typeinf at ./inference.jl:1257
in abstract_call_gf at ./inference.jl:696
in abstract_call at ./inference.jl:857
in abstract_eval_call at ./inference.jl:904
in abstract_eval at ./inference.jl:931
in abstract_eval_call at ./inference.jl:881
in abstract_eval at ./inference.jl:931
in typeinf_uncached at ./inference.jl:1591
in typeinf at ./inference.jl:1307
in typeinf at ./inference.jl:1257
in abstract_call_gf at ./inference.jl:696
in abstract_call at ./inference.jl:857
in abstract_eval_call at ./inference.jl:904
in abstract_eval at ./inference.jl:931
in abstract_interpret at ./inference.jl:1080
in typeinf_uncached at ./inference.jl:1518
in typeinf at ./inference.jl:1307
in typeinf at ./inference.jl:1257
in abstract_call_gf at ./inference.jl:696
in abstract_call at ./inference.jl:857
in abstract_call at ./inference.jl:817
in abstract_eval_call at ./inference.jl:904
in abstract_eval at ./inference.jl:931
in typeinf_uncached at ./inference.jl:1591
in typeinf at ./inference.jl:1307
in typeinf at ./inference.jl:1257
in abstract_call_gf at ./inference.jl:696
in abstract_call at ./inference.jl:857
in abstract_call at ./inference.jl:817
in abstract_eval_call at ./inference.jl:904
in abstract_eval at ./inference.jl:931
in abstract_eval_call at ./inference.jl:881
in abstract_eval at ./inference.jl:931
in typeinf_uncached at ./inference.jl:1591
in typeinf at ./inference.jl:1307
in typeinf at ./inference.jl:1257
in abstract_call_gf at ./inference.jl:696
in abstract_call at ./inference.jl:857
in abstract_eval_call at ./inference.jl:904
in abstract_eval at ./inference.jl:931
in typeinf_uncached at ./inference.jl:1591
in typeinf at ./inference.jl:1307
in typeinf at ./inference.jl:1257
in abstract_call_gf at ./inference.jl:696
in abstract_call at ./inference.jl:857
in abstract_eval_call at ./inference.jl:904
in abstract_eval at ./inference.jl:931
in abstract_interpret at ./inference.jl:1080
in typeinf_uncached at ./inference.jl:1518
in typeinf at ./inference.jl:1307
in typeinf at ./inference.jl:1257
in abstract_call_gf at ./inference.jl:696
in abstract_call at ./inference.jl:857
in abstract_eval_call at ./inference.jl:904
in abstract_eval at ./inference.jl:931
in abstract_interpret at ./inference.jl:1080
in typeinf_uncached at ./inference.jl:1518
in typeinf at ./inference.jl:1307
in typeinf at ./inference.jl:1257
in abstract_call_gf at ./inference.jl:696
in abstract_call at ./inference.jl:857
in abstract_eval_call at ./inference.jl:904
in abstract_eval at ./inference.jl:931
in typeinf_uncached at ./inference.jl:1591
in typeinf at ./inference.jl:1307
in typeinf_ext at ./inference.jl:1251
in linsolve at /Users/solver/.julia/v0.4/ApproxFun/src/Operators/linsolve.jl:108
in linsolve at /Users/solver/.julia/v0.4/ApproxFun/src/Operators/linsolve.jl:126
in linsolve at /Users/solver/.julia/v0.4/ApproxFun/src/Operators/linsolve.jl:130
in ./ at /Users/solver/.julia/v0.4/ApproxFun/src/Extras/specialfunctions.jl:89

[jiahao]

Special case of #11200?

[dlfivefifty]

I don't think it's a special case, because it's invalid type syntax rather than deprecated type

Sent from my iPhone

On 15 May 2015, at 12:14 pm, Jiahao Chen notifications@github.com wrote:

Special case of #11200?

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Reply to this email directly or view it on GitHub.

[ihnorton]

Nominating for bug because that's not a very actionable error message.