Update resolution.jl

oscar-system · Sep 23, 2019 · c1f13fc · c1f13fc
1 parent 3d2b89e
commit c1f13fc
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/src/resolution/resolution.jl b/src/resolution/resolution.jl
@@ -21,7 +21,8 @@ elem_type(::ResolutionSet{T}) where T <: AbstractAlgebra.RingElem = sresolution{
 parent_type(::Type{sresolution{T}}) where T <: AbstractAlgebra.RingElem = ResolutionSet{T}
 
 function checkbounds(r::sresolution, i::Int)
-   (i < 1 || i > length(r)) && throw(BoundsError(r, i))
+   # structure has 1 more item than the mathematical length
+   (i < 1 || i > length(r) + 1) && throw(BoundsError(r, i))
 end
 
 function getindex(r::sresolution, i::Int)