From 2f8384c5fade4c8de65497e5cef22ea7d20e29ba Mon Sep 17 00:00:00 2001
From: David Bold <dave@ipp.mpg.de>
Date: Mon, 17 Nov 2025 12:54:30 +0100
Subject: [PATCH] applyParallelBoundary can be a no-op for non-fci

---
 src/field/field3d.cxx | 35 ++++++++++++++++++++++++++++++-----
 1 file changed, 30 insertions(+), 5 deletions(-)

diff --git a/src/field/field3d.cxx b/src/field/field3d.cxx
index 0d2bc0694e..4c5ffa9748 100644
--- a/src/field/field3d.cxx
+++ b/src/field/field3d.cxx
@@ -478,7 +478,12 @@ void Field3D::applyParallelBoundary() {
   TRACE("Field3D::applyParallelBoundary()");
 
   checkData(*this);
-  ASSERT1(hasParallelSlices());
+  if (isFci()) {
+    ASSERT1(hasParallelSlices());
+  }
+  if (!hasParallelSlices()) {
+    return;
+  }
 
   // Apply boundary to this field
   for (const auto& bndry : getBoundaryOpPars()) {
@@ -491,7 +496,12 @@ void Field3D::applyParallelBoundary(BoutReal t) {
   TRACE("Field3D::applyParallelBoundary(t)");
 
   checkData(*this);
-  ASSERT1(hasParallelSlices());
+  if (isFci()) {
+    ASSERT1(hasParallelSlices());
+  }
+  if (!hasParallelSlices()) {
+    return;
+  }
 
   // Apply boundary to this field
   for (const auto& bndry : getBoundaryOpPars()) {
@@ -504,7 +514,12 @@ void Field3D::applyParallelBoundary(const std::string& condition) {
   TRACE("Field3D::applyParallelBoundary(condition)");
 
   checkData(*this);
-  ASSERT1(hasParallelSlices());
+  if (isFci()) {
+    ASSERT1(hasParallelSlices());
+  }
+  if (!hasParallelSlices()) {
+    return;
+  }
 
   /// Get the boundary factory (singleton)
   BoundaryFactory* bfact = BoundaryFactory::getInstance();
@@ -523,7 +538,12 @@ void Field3D::applyParallelBoundary(const std::string& region,
   TRACE("Field3D::applyParallelBoundary(region, condition)");
 
   checkData(*this);
-  ASSERT1(hasParallelSlices());
+  if (isFci()) {
+    ASSERT1(hasParallelSlices());
+  }
+  if (!hasParallelSlices()) {
+    return;
+  }
 
   /// Get the boundary factory (singleton)
   BoundaryFactory* bfact = BoundaryFactory::getInstance();
@@ -545,7 +565,12 @@ void Field3D::applyParallelBoundary(const std::string& region,
   TRACE("Field3D::applyParallelBoundary(region, condition, f)");
 
   checkData(*this);
-  ASSERT1(hasParallelSlices());
+  if (isFci()) {
+    ASSERT1(hasParallelSlices());
+  }
+  if (!hasParallelSlices()) {
+    return;
+  }
 
   /// Get the boundary factory (singleton)
   BoundaryFactory* bfact = BoundaryFactory::getInstance();