From 9478af93e454d398a9263efad4b82b08862c34cb Mon Sep 17 00:00:00 2001
From: Rodrigo Faselli <162915171+RF47@users.noreply.github.com>
Date: Tue, 7 Apr 2026 11:22:43 -0300
Subject: [PATCH] =?UTF-8?q?=F0=9F=92=A5Fix=20Crash=20with=20painted=20Line?=
 =?UTF-8?q?=20in=20=20some=20corrupted=20models=20(#12806)?=
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Safeguard EdgeGrid.hpp
---
 src/libslic3r/EdgeGrid.hpp | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/libslic3r/EdgeGrid.hpp b/src/libslic3r/EdgeGrid.hpp
index 744a23e186..6bbed1e9fa 100644
--- a/src/libslic3r/EdgeGrid.hpp
+++ b/src/libslic3r/EdgeGrid.hpp
@@ -224,6 +224,8 @@ public:
 						iy += 1;
 						assert(iy <= iyb);
 					}
+					if (ix < 0 || iy < 0 || ix >= (int64_t)m_cols || iy >= (int64_t)m_rows)
+						return; 
 					if (! visitor(iy, ix))
 						return;
 				} while (ix != ixb || iy != iyb);
@@ -245,6 +247,8 @@ public:
 						iy -= 1;
 						assert(iy >= iyb);
 					}
+					if (ix < 0 || iy < 0 || ix >= (int64_t)m_cols || iy >= (int64_t)m_rows)
+						return; 
 					if (! visitor(iy, ix))
 						return;
 				} while (ix != ixb || iy != iyb);
@@ -270,6 +274,8 @@ public:
 						iy += 1;
 						assert(iy <= iyb);
 					}
+					if (ix < 0 || iy < 0 || ix >= (int64_t)m_cols || iy >= (int64_t)m_rows)
+						return; 
 					if (! visitor(iy, ix))
 						return;
 				} while (ix != ixb || iy != iyb);
@@ -307,6 +313,8 @@ public:
 						iy -= 1;
 						assert(iy >= iyb);
 					}
+					if (ix < 0 || iy < 0 || ix >= (int64_t)m_cols || iy >= (int64_t)m_rows)
+						return; 
 					if (! visitor(iy, ix))
 						return;
 				} while (ix != ixb || iy != iyb);