diff --git a/distr/flecs.c b/distr/flecs.c
index 50151b08a..58b20b1ef 100644
--- a/distr/flecs.c
+++ b/distr/flecs.c
@@ -60274,6 +60274,7 @@ int ecs_script_visit_(
 
 #ifdef FLECS_SCRIPT
 
+static
 int flecs_script_check_expr(
     ecs_script_eval_visitor_t *v,
     ecs_expr_node_t **expr_ptr,
@@ -61930,8 +61931,10 @@ int flecs_script_eval_for_range(
     ecs_script_eval_visitor_t *v,
     ecs_script_for_range_t *node)
 {
-    ecs_value_t from_val = { .type = ecs_id(ecs_i32_t) };
-    ecs_value_t to_val = { .type = ecs_id(ecs_i32_t) };
+    int32_t from;
+    int32_t to;
+    ecs_value_t from_val = { .type = ecs_id(ecs_i32_t), .ptr = &from };
+    ecs_value_t to_val = { .type = ecs_id(ecs_i32_t), .ptr = &to };
 
     if (flecs_script_eval_expr(v, &node->from, &from_val)) {
         return -1;
@@ -61941,9 +61944,6 @@ int flecs_script_eval_for_range(
         return -1;
     }
 
-    int32_t from = *(int32_t*)from_val.ptr;
-    int32_t to = *(int32_t*)to_val.ptr;
-
     v->vars = flecs_script_vars_push(v->vars, &v->r->stack, &v->r->allocator);
 
     ecs_script_var_t *var = ecs_script_vars_declare(v->vars, node->loop_var);
@@ -78847,10 +78847,10 @@ int flecs_expr_interpolated_string_visit_type(
                 }
 
                 /* Fiddly, but reduces need for allocations */
-                ecs_size_t offset = flecs_ito(
-                    int32_t, node->buffer - node->value);
-                var_name = ECS_OFFSET(var_name, offset);
-                (*(char*)ECS_OFFSET(ptr, offset)) = '\0';
+                ecs_size_t var_name_pos = flecs_ito(int32_t, var_name - node->value);
+                var_name = &node->buffer[var_name_pos];
+                ecs_size_t var_name_end = flecs_ito(int32_t, ptr - node->value);
+                node->buffer[var_name_end] = '\0';
 
                 ecs_expr_variable_t *var = flecs_expr_variable_from(
                     script, (ecs_expr_node_t*)node, var_name);
@@ -78898,6 +78898,7 @@ int flecs_expr_interpolated_string_visit_type(
                 result = (ecs_expr_node_t*)flecs_expr_cast(script, 
                     (ecs_expr_node_t*)result, ecs_id(ecs_string_t));
                 if (!result) {
+                    /* Cast failed */
                     goto error;
                 }
             }
@@ -79015,11 +79016,12 @@ int flecs_expr_initializer_visit_type(
         }
 
         if (elem->value->type != elem_type) {
-            elem->value = (ecs_expr_node_t*)flecs_expr_cast(
+            ecs_expr_node_t *cast = (ecs_expr_node_t*)flecs_expr_cast(
                 script, elem->value, elem_type);
-            if (!elem->value) {
+            if (!cast) {
                 goto error;
             }
+            elem->value = cast;
         }
 
         if (!is_opaque) {
diff --git a/distr/flecs.h b/distr/flecs.h
index c90dd41b1..e9d1f9f68 100644
--- a/distr/flecs.h
+++ b/distr/flecs.h
@@ -265,7 +265,7 @@
  * When enabled, Flecs will use the OS allocator provided in the OS API directly
  * instead of the builtin block allocator. This can decrease memory utilization
  * as memory will be freed more often, at the cost of decreased performance. */
-// #define FLECS_USE_OS_ALLOC
+#define FLECS_USE_OS_ALLOC
 
 /** @def FLECS_ID_DESC_MAX
  * Maximum number of ids to add ecs_entity_desc_t / ecs_bulk_desc_t */
diff --git a/include/flecs.h b/include/flecs.h
index 027abc239..ec96077c2 100644
--- a/include/flecs.h
+++ b/include/flecs.h
@@ -263,7 +263,7 @@
  * When enabled, Flecs will use the OS allocator provided in the OS API directly
  * instead of the builtin block allocator. This can decrease memory utilization
  * as memory will be freed more often, at the cost of decreased performance. */
-// #define FLECS_USE_OS_ALLOC
+#define FLECS_USE_OS_ALLOC
 
 /** @def FLECS_ID_DESC_MAX
  * Maximum number of ids to add ecs_entity_desc_t / ecs_bulk_desc_t */
diff --git a/src/addons/script/expr/visit_type.c b/src/addons/script/expr/visit_type.c
index 53eb73176..dfed36307 100644
--- a/src/addons/script/expr/visit_type.c
+++ b/src/addons/script/expr/visit_type.c
@@ -566,10 +566,10 @@ int flecs_expr_interpolated_string_visit_type(
                 }
 
                 /* Fiddly, but reduces need for allocations */
-                ecs_size_t offset = flecs_ito(
-                    int32_t, node->buffer - node->value);
-                var_name = ECS_OFFSET(var_name, offset);
-                (*(char*)ECS_OFFSET(ptr, offset)) = '\0';
+                ecs_size_t var_name_pos = flecs_ito(int32_t, var_name - node->value);
+                var_name = &node->buffer[var_name_pos];
+                ecs_size_t var_name_end = flecs_ito(int32_t, ptr - node->value);
+                node->buffer[var_name_end] = '\0';
 
                 ecs_expr_variable_t *var = flecs_expr_variable_from(
                     script, (ecs_expr_node_t*)node, var_name);
@@ -617,6 +617,7 @@ int flecs_expr_interpolated_string_visit_type(
                 result = (ecs_expr_node_t*)flecs_expr_cast(script, 
                     (ecs_expr_node_t*)result, ecs_id(ecs_string_t));
                 if (!result) {
+                    /* Cast failed */
                     goto error;
                 }
             }
@@ -734,11 +735,12 @@ int flecs_expr_initializer_visit_type(
         }
 
         if (elem->value->type != elem_type) {
-            elem->value = (ecs_expr_node_t*)flecs_expr_cast(
+            ecs_expr_node_t *cast = (ecs_expr_node_t*)flecs_expr_cast(
                 script, elem->value, elem_type);
-            if (!elem->value) {
+            if (!cast) {
                 goto error;
             }
+            elem->value = cast;
         }
 
         if (!is_opaque) {
diff --git a/src/addons/script/visit_check.c b/src/addons/script/visit_check.c
index 519ae43eb..b7ec8bc6b 100644
--- a/src/addons/script/visit_check.c
+++ b/src/addons/script/visit_check.c
@@ -8,6 +8,7 @@
 #ifdef FLECS_SCRIPT
 #include "script.h"
 
+static
 int flecs_script_check_expr(
     ecs_script_eval_visitor_t *v,
     ecs_expr_node_t **expr_ptr,
diff --git a/src/addons/script/visit_eval.c b/src/addons/script/visit_eval.c
index 8d688029b..249ae1590 100644
--- a/src/addons/script/visit_eval.c
+++ b/src/addons/script/visit_eval.c
@@ -1166,8 +1166,10 @@ int flecs_script_eval_for_range(
     ecs_script_eval_visitor_t *v,
     ecs_script_for_range_t *node)
 {
-    ecs_value_t from_val = { .type = ecs_id(ecs_i32_t) };
-    ecs_value_t to_val = { .type = ecs_id(ecs_i32_t) };
+    int32_t from;
+    int32_t to;
+    ecs_value_t from_val = { .type = ecs_id(ecs_i32_t), .ptr = &from };
+    ecs_value_t to_val = { .type = ecs_id(ecs_i32_t), .ptr = &to };
 
     if (flecs_script_eval_expr(v, &node->from, &from_val)) {
         return -1;
@@ -1177,9 +1179,6 @@ int flecs_script_eval_for_range(
         return -1;
     }
 
-    int32_t from = *(int32_t*)from_val.ptr;
-    int32_t to = *(int32_t*)to_val.ptr;
-
     v->vars = flecs_script_vars_push(v->vars, &v->r->stack, &v->r->allocator);
 
     ecs_script_var_t *var = ecs_script_vars_declare(v->vars, node->loop_var);
diff --git a/test/script/src/ExprAst.c b/test/script/src/ExprAst.c
index 93703ac9e..59646973e 100644
--- a/test/script/src/ExprAst.c
+++ b/test/script/src/ExprAst.c
@@ -250,7 +250,7 @@ void ExprAst_interpolated_string_curly_brackets_w_var(void) {
 void ExprAst_template_w_foldable_const(void) {
     ecs_world_t *world = ecs_init();
 
-    ecs_entity_t ecs_id(Position) = ecs_struct(world, {
+    ecs_struct(world, {
         .entity = ecs_entity(world, {.name = "Position"}),
         .members = {
             {"x", ecs_id(ecs_f32_t)},