dualfroz
33b06375b9
Every mode (src/index.js, src/full.js, src/lite.js, src/json.js) picked its clone strategy from Object.prototype.toString.call(x), which reads a user-settable Symbol.toStringTag. A plain object declaring a recognized tag (eg "Map") was routed into that type's clone branch and crashed on methods it doesn't have; one with an unrecognized tag fell through every branch and was returned by reference instead of cloned. Also check the object's real constructor, which Symbol.toStringTag cannot affect, so a plain object (or one with no prototype) is still deep-cloned as a plain object no matter what tag it claims. Fixes #54