object_properties_load() does not work for non-string keys - intentional?

Hi! Working on unserialize edge case patches backporting, I've discovered that object_properties_load() function crashes if the properties array contains non-string keys (which can happen on unserialize). Now, I can fix the crash, but I can fix it in two ways: 1. Ignore such keys (i.e. such properties will be banned, BC break against 5.x) 2. Treat such keys as in 5.x i.e. insert them in the hash. So, I wanted to know if dropping non-string keys there was intentional or not? -- Stas Malyshev smalyshev@gmail.com