Fix release build crash on level load

source/objects/objects.c

@@ -1765,10 +1765,20 @@ void object_reconnect_to_map(
 	}
 	else
 	{
+#ifdef HALO_LINUX
+		/* location may point here after the if below: declared inside it,
+		the location would be read after its lifetime ended, which an
+		optimising compiler is free to break (release builds crashed placing
+		objects at level start, reading a stack slot reused meanwhile) */
+		struct location bounding_sphere_location;
+
+#endif
 		if (!location)
 		{
+#ifndef HALO_LINUX
 			struct location bounding_sphere_location;
-			
+#endif
+
 			scenario_location_from_point(&bounding_sphere_location, &object->object.bounding_sphere_center);
 			location = &bounding_sphere_location;
 

source/physics/collision_debug.c

@@ -320,6 +320,11 @@ void collision_debug_render(
 					real_matrix4x3 const *matrix = NULL;
 					struct collision_surface const *surface = NULL;
 					char textstring[2048];
+#ifdef HALO_LINUX
+					/* matrix points into it after the else if below, so it
+					has to outlive that block (see object_reconnect_to_map) */
+					struct collision_model_instance instance;
+#endif
 
 					render_debug_vector(TRUE, &point, &vector, collision.t, global_real_argb_red);
 					render_debug_point(TRUE, &collision.point, 0.125f, global_real_argb_red);
@@ -331,7 +336,9 @@ void collision_debug_render(
 					}
 					else if (collision.type == _collision_result_object && collision.node_index != NONE)
 					{
+#ifndef HALO_LINUX
 						struct collision_model_instance instance;
+#endif
 
 						if (collision_model_instance_new(&instance, collision.object_index))
 						{