diff --git a/src/libslic3r/GCode.cpp b/src/libslic3r/GCode.cpp
index 0b62fd0d6f..8238f5be85 100644
--- a/src/libslic3r/GCode.cpp
+++ b/src/libslic3r/GCode.cpp
@@ -6215,7 +6215,8 @@ std::string GCode::extrude_support(const ExtrusionEntityCollection &support_fill
     static constexpr const char* support_transition_label = "support transition";
     static constexpr const char* support_ironing_label    = "support ironing";
 
-    static const auto speed_for_path = [&](double length, ExtrusionRole role, double default_speed = -1.0) {
+    // Not static: it captures `this` by reference.
+    const auto speed_for_path = [&](double length, ExtrusionRole role, double default_speed = -1.0) {
         if (!is_support(role) || length > SMALL_PERIMETER_LENGTH(NOZZLE_CONFIG(small_support_perimeter_threshold)))
             return default_speed;
 
diff --git a/tests/fff_print/test_support_material.cpp b/tests/fff_print/test_support_material.cpp
index 24c0e9cdc5..f854939c8c 100644
--- a/tests/fff_print/test_support_material.cpp
+++ b/tests/fff_print/test_support_material.cpp
@@ -93,3 +93,14 @@ SCENARIO("Support layer Z honors contact distance", "[SupportMaterial]")
         }
     }
 }
+
+// extrude_support once held a `static` lambda capturing `this`, so a second export in the
+// same process dereferenced a returned stack frame (ASan: stack-use-after-return).
+TEST_CASE("Support G-code emission survives a second slice in the same process", "[SupportMaterial][Regression]")
+{
+    const std::string first = slice({ TestMesh::overhang }, { { "enable_support", 1 } });
+    REQUIRE(! layers_with_role(first, "support").empty());
+
+    const std::string second = slice({ TestMesh::overhang }, { { "enable_support", 1 } });
+    REQUIRE(! layers_with_role(second, "support").empty());
+}