From 63d31c2d600ca2b0bf83355f3f4c227782962efd Mon Sep 17 00:00:00 2001
From: shun-iwasawa <shun.iwasawa@ghibli.jp>
Date: Fri, 8 Oct 2021 15:56:15 +0900
Subject: [PATCH] fix crush on inserting fx

---
 toonz/sources/toonzqt/fxschematicscene.cpp | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/toonz/sources/toonzqt/fxschematicscene.cpp b/toonz/sources/toonzqt/fxschematicscene.cpp
index 1e5d6536..8f820b18 100644
--- a/toonz/sources/toonzqt/fxschematicscene.cpp
+++ b/toonz/sources/toonzqt/fxschematicscene.cpp
@@ -2194,8 +2194,12 @@ bool FxSchematicScene::isAnEmptyZone_withParentFx(const QRectF &rect,
     if (fxNode && fxNode->isA(eXSheetFx)) continue;
     // check only the fxs sharing the same parent
     if (!fxNode) continue;
-    for (int p = 0; p < fxNode->getInputPortCount(); p++) {
-      if (parent == fxNode->getFx()->getInputPort(p)->getFx()) {
+    TFx *fx = fxNode->getFx();
+    if (TZeraryColumnFx *zfx = dynamic_cast<TZeraryColumnFx *>(fx))
+      fx = zfx->getZeraryFx();
+    if (!fx || fx == parent) continue;
+    for (int p = 0; p < fx->getInputPortCount(); p++) {
+      if (parent == fx->getInputPort(p)->getFx()) {
         if (node->boundingRect().translated(node->scenePos()).intersects(rect))
           return false;
         else