ellipk(NaN) throws UndefVarError #498
Description
Hi! I found ellipk crashes when input is NaN.
julia> ellipk(NaN)
ERROR: UndefVarError: `x` not defined in local scope
Suggestion: check for an assignment to a local variable that shadows a global of the same name.
Stacktrace:
[1] _ellipk(m::Float64)
@ SpecialFunctions ~/.julia/packages/SpecialFunctions/mf0qH/src/ellip.jl:57
[2] ellipk(m::Float64)
@ SpecialFunctions ~/.julia/packages/SpecialFunctions/mf0qH/src/ellip.jl:45
[3] top-level scope
@ REPL[14]:1I guess it should either return NaN or throw a DomainError.
There is also an issue with -Inf.
julia> ellipk(-Inf)
ERROR: UndefVarError: `t` not defined in local scope
Suggestion: check for an assignment to a local variable that shadows a global of the same name.
Stacktrace:
[1] _ellipk(m::Float64)
@ SpecialFunctions ~/.julia/packages/SpecialFunctions/mf0qH/src/ellip.jl:0
[2] ellipk(m::Float64)
@ SpecialFunctions ~/.julia/packages/SpecialFunctions/mf0qH/src/ellip.jl:45
[3] top-level scope
@ REPL[12]:1I think it should return 0.