From b1f11f590529473c1118ee932e1fdef2830732b3 Mon Sep 17 00:00:00 2001
From: Michal Sojka <michal.sojka@cvut.cz>
Date: Mon, 13 May 2019 09:31:15 +0200
Subject: [PATCH] Fix BoundsError with empty datasets

The error can be triggered with:

    @gp Float64[]

which produces the following error message

    ERROR: BoundsError: attempt to access 0-element Array{Float64,1} at index [1]
    Stacktrace:
     [1] getindex at ./array.jl:729 [inlined]
     [2] #newdatasource#83(::String, ::Function, ::Gnuplot.Concrete_Session, ::Array{Float64,1}) at ~/.julia/dev/Gnuplot/src/Gnuplot.jl:316
    ...

This commit fixes the Julia error, but Gnuplot still reports the
following error: "Bad data on line 1 of file $data0". This is dealt
with in the following commit.
---
 src/Gnuplot.jl | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/Gnuplot.jl b/src/Gnuplot.jl
index 07ef58e..db7ab7f 100644
--- a/src/Gnuplot.jl
+++ b/src/Gnuplot.jl
@@ -313,10 +313,10 @@ function newdatasource(gp::DrySession, args...; name="")
         if typeof(d) <: Number
             ok = true
         elseif typeof(d) <: AbstractArray
-            if typeof(d[1]) <: Number
+            if typeof(d).parameters[1] <: Number
                 ok = true
             end
-            if typeof(d[1]) <: ColorTypes.RGB
+            if typeof(d).parameters[1] <: ColorTypes.RGB
                 ok = true
             end
         end