From db8dcfc433327405ee1e4e9e9c37cbd935d3c90b Mon Sep 17 00:00:00 2001
From: Michal Sojka <michal.sojka@cvut.cz>
Date: Mon, 6 Sep 2021 15:57:50 +0200
Subject: [PATCH] Fix bounds error in hist recipe

When running hist([1,2,3], bs=2), the following error is produced:

ERROR: BoundsError: attempt to access 1-element Vector{Float64} at index [2]
Stacktrace:
 [1] getindex
   @ ./array.jl:801 [inlined]
 [2] hist(v::Vector{Int64}; range::Vector{Float64}, bs::Int64, nbins::Int64, pad::Bool)
   @ Gnuplot ~/.julia/dev/Gnuplot/src/Gnuplot.jl:1873
 [3] top-level scope
   @ REPL[25]:1
---
 src/Gnuplot.jl   | 2 +-
 test/runtests.jl | 3 +++
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/Gnuplot.jl b/src/Gnuplot.jl
index 18a8057..7c82e50 100644
--- a/src/Gnuplot.jl
+++ b/src/Gnuplot.jl
@@ -1853,9 +1853,9 @@ function hist(v::Vector{T}; range=[NaN,NaN], bs=NaN, nbins=0, pad=true) where T
     end
     @assert sum(hh.weights) == length(i)
     x = collect(hh.edges[1])
+    binsize = x[2] - x[1]
     x = (x[1:end-1] .+ x[2:end]) ./ 2
     h = hh.weights
-    binsize = x[2] - x[1]
     if pad
         x = [x[1]-binsize, x..., x[end]+binsize]
         h = [0, h..., 0]
diff --git a/test/runtests.jl b/test/runtests.jl
index 76a91ed..53fe0fe 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -286,4 +286,7 @@ Gnuplot.quit(:default)
 Gnuplot.options.dry = true
 @gp hist(randn(1000))
 
+# Various hist() corner cases
+@gp hist([1,2,3], bs=2)
+
 Gnuplot.quitall()