[BUG] Namespaces can't access global types

[lewisakura]

Describe the bug

When using namespaces, they can't access globally defined types.

Reproduction

https://zap.redblox.dev/playground?code=dHlwZSBDaGFyYWN0ZXIgPSBJbnN0YW5jZS5Nb2RlbA0KDQpuYW1lc3BhY2UgVGVzdCA9IHsNCiAgICBldmVudCBUZXN0ID0gew0KICAgICAgICBmcm9tOiBTZXJ2ZXIsDQogICAgICAgIHR5cGU6IFJlbGlhYmxlLA0KICAgICAgICBjYWxsOiBTaW5nbGVBc3luYywNCiAgICAgICAgZGF0YTogQ2hhcmFjdGVyDQogICAgfQ0KfQ%3D%3D

Expected behavior

Namespaces can access globally defined types.