Fix GC bug when using morpho_call and a class...

Author: softmattertheory

src/core/vm.c

@@ -1886,7 +1886,7 @@ bool morpho_call(vm *v, value f, int nargs, value *args, value *ret) {
             } else morpho_runtimeerror(v, VM_NOINITIALIZER, MORPHO_GETCSTRING(klass->name));
 
             if (success) {
-                vm_bindobject(v, obj);
+                vm_bindobjectwithoutcollect(v, obj); // 4/2/25 Changed to disable collection because we can't guarantee the external context of the caller (e.g. apply)
                 *ret = obj;
             } else morpho_freeobject(obj);
         } else morpho_runtimeerror(v, VM_INSTANTIATEFAILED);

test/apply/apply_optionals.morpho

@@ -0,0 +1,14 @@
+// Apply a function with optional arguments
+
+fn f(x,y=0,z=0) {
+  return x*x+y*y+z*z;
+}
+
+print apply(f, 0.5, y=0.2, z=0.1)
+// expect: 0.3
+
+print apply(f, 0.5)
+// expect: 0.25
+
+print apply(f, 0.5, q=1)
+// expect error 'InvldArgs'