fix(tests/kernel/max_sharing): max_sharing on OSX

src/kernel/expr.cpp

@@ -668,6 +668,7 @@ void initialize_expr() {
 }
 
 void finalize_expr() {
+    enable_expr_caching(false);
     delete g_Prop;
     delete g_Type1;
     delete g_dummy;

src/kernel/level.cpp

@@ -747,10 +747,11 @@ levels param_names_to_levels(level_param_names const & ps) {
 
 void initialize_level() {
     g_level_zero = new level(new level_cell(level_kind::Zero, 7u));
-    g_level_one  = new level(mk_succ(mk_level_zero()));
+    g_level_one  = new level(new level_succ(*g_level_zero));
 }
 
 void finalize_level() {
+    enable_level_caching(false);
     delete g_level_one;
     delete g_level_zero;
 }

src/tests/kernel/max_sharing.cpp

@@ -69,10 +69,12 @@ int main() {
     initialize_kernel_module();
     initialize_library_module();
     init_default_print_fn();
-    scoped_expr_caching set(false);
-    tst1();
-    tst2();
-    tst3();
+    {
+        scoped_expr_caching set(false);
+        tst1();
+        tst2();
+        tst3();
+    }
     finalize_library_module();
     finalize_kernel_module();
     finalize_sexpr_module();