From a908486d633f3ffac9217431b0e5b7adb333989d Mon Sep 17 00:00:00 2001
From: odow <o.dowson@gmail.com>
Date: Mon, 4 Nov 2024 10:26:20 +1300
Subject: [PATCH] Use add_constrained_variable with two sets when adding
 bounded variables

---
 src/variables.jl | 21 ++++++++++++++++++---
 1 file changed, 18 insertions(+), 3 deletions(-)

diff --git a/src/variables.jl b/src/variables.jl
index 07912a8c5c4..46e8315b60d 100644
--- a/src/variables.jl
+++ b/src/variables.jl
@@ -1983,6 +1983,16 @@ function _moi_add_constrained_variable(
     return x
 end
 
+function _moi_add_constrained_variable(
+    moi_backend::MOI.ModelLike,
+    ::Nothing,
+    set_gt::MOI.GreaterThan,
+    set_lt::MOI.LessThan,
+)
+    x, _ = MOI.add_constrained_variable(moi_backend, set_gt, set_lt)
+    return x
+end
+
 function _moi_add_variable(
     moi_backend,
     model::GenericModel{T},
@@ -1994,12 +2004,17 @@ function _moi_add_variable(
     # variables.
     index = nothing
     info = v.info
-    if info.has_lb
+    if info.has_lb && info.has_ub
+        set_lb =
+            MOI.GreaterThan{T}(_to_value(T, info.lower_bound, "lower bound"))
+        set_ub = MOI.LessThan{T}(_to_value(T, info.upper_bound, "upper bound"))
+        index =
+            _moi_add_constrained_variable(moi_backend, index, set_lb, set_ub)
+    elseif info.has_lb
         set_lb =
             MOI.GreaterThan{T}(_to_value(T, info.lower_bound, "lower bound"))
         index = _moi_add_constrained_variable(moi_backend, index, set_lb)
-    end
-    if info.has_ub
+    elseif info.has_ub
         set_ub = MOI.LessThan{T}(_to_value(T, info.upper_bound, "upper bound"))
         index = _moi_add_constrained_variable(moi_backend, index, set_ub)
     end