Another fix

jump-dev · May 5, 2021 · 69667d2 · 69667d2
1 parent 01b8913
commit 69667d2
Showing 1 changed file with 6 additions and 2 deletions.
diff --git a/src/Utilities/vector_of_constraints.jl b/src/Utilities/vector_of_constraints.jl
@@ -38,7 +38,7 @@ MOI.is_empty(v::VectorOfConstraints) = v.constraints === nothing
 MOI.empty!(v::VectorOfConstraints) = (v.constraints = nothing)
 
 function MOI.supports_constraint(
-    v::VectorOfConstraints{F,S},
+    ::VectorOfConstraints{F,S},
     ::Type{F},
     ::Type{S},
 ) where {F<:MOI.AbstractFunction,S<:MOI.AbstractSet}
@@ -241,7 +241,8 @@ function _delete_variables(
     if MOI.is_empty(v)
         return
     end
-    filter!(_constraints(v)) do p
+    cons = _constraints(v)
+    filter!(cons) do p
         f = p.second[1]
         del = if length(f.variables) == 1
             first(f.variables) in vis
@@ -253,6 +254,9 @@ function _delete_variables(
         end
         return !del
     end
+    if length(cons) == 0
+        MOI.empty!(v)
+    end
     return
 end