From f1952b95910eab65a8556580d0068f0e00f1bf28 Mon Sep 17 00:00:00 2001
From: Vojtech Bubnik <bubnikv@gmail.com>
Date: Wed, 4 Oct 2023 11:30:41 +0200
Subject: [PATCH] Fix of SPE-1933 Fixing crash with pressure equalizer enabled.
 This crash was introduced with ArcWelder integration.

---
 src/libslic3r/GCode.cpp | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/libslic3r/GCode.cpp b/src/libslic3r/GCode.cpp
index 3a8b8842fa..a9a7ee2a93 100644
--- a/src/libslic3r/GCode.cpp
+++ b/src/libslic3r/GCode.cpp
@@ -1463,13 +1463,13 @@ void GCodeGenerator::process_layers(
     const auto smooth_path_interpolator = tbb::make_filter<void, std::pair<size_t, GCode::SmoothPathCache>>(slic3r_tbb_filtermode::serial_in_order,
         [this, &print, &layers_to_print, &layer_to_print_idx, &interpolation_params](tbb::flow_control &fc) -> std::pair<size_t, GCode::SmoothPathCache> {
             if (layer_to_print_idx >= layers_to_print.size()) {
-                if ((!m_pressure_equalizer && layer_to_print_idx == layers_to_print.size()) || (m_pressure_equalizer && layer_to_print_idx == (layers_to_print.size() + 1))) {
+                if (layer_to_print_idx == layers_to_print.size() + (m_pressure_equalizer ? 1 : 0)) {
                     fc.stop();
                     return {};
                 } else {
                     // Pressure equalizer need insert empty input. Because it returns one layer back.
                     // Insert NOP (no operation) layer;
-                    return { ++ layer_to_print_idx, {} };
+                    return { layer_to_print_idx ++, {} };
                 }
             } else {
                 print.throw_if_canceled();
@@ -1561,13 +1561,13 @@ void GCodeGenerator::process_layers(
     const auto smooth_path_interpolator = tbb::make_filter<void, std::pair<size_t, GCode::SmoothPathCache>> (slic3r_tbb_filtermode::serial_in_order,
         [this, &print, &layers_to_print, &layer_to_print_idx, interpolation_params](tbb::flow_control &fc) -> std::pair<size_t, GCode::SmoothPathCache> {
             if (layer_to_print_idx >= layers_to_print.size()) {
-                if ((!m_pressure_equalizer && layer_to_print_idx == layers_to_print.size()) || (m_pressure_equalizer && layer_to_print_idx == (layers_to_print.size() + 1))) {
+                if (layer_to_print_idx == layers_to_print.size() + (m_pressure_equalizer ? 1 : 0)) {
                     fc.stop();
                     return {};
                 } else {
                     // Pressure equalizer need insert empty input. Because it returns one layer back.
                     // Insert NOP (no operation) layer;
-                    return { ++ layer_to_print_idx, {} };
+                    return { layer_to_print_idx ++, {} };
                 }
             } else {
                 print.throw_if_canceled();