more Promise confusion/inconsistency (or implementation bugs?)

/* Just an update for posterity: These bugs have been fixed by implementations and all 6 of these examples work fine in current Chrome, Firefox, and Safari (checked on May 24, 2018). */

Promise.reject(42).then(null,null).then(null,function(reason){ console.log("reason:" + reason); }); // reason:42

Promise.reject(42).then(5,null).then(null,function(reason){ console.log("reason:" + reason); }); // reason:42

Promise.reject(42).then(null,5).then(null,function(reason){ console.log("reason:" + reason); }); // TypeError: number is not a function

// *************

Promise.resolve(42).then(null,null).then(function(msg){ console.log("msg:" + msg); },null); // msg:42

Promise.resolve(42).then(null,5).then(function(msg){ console.log("msg:" + msg); },null); // msg:42

Promise.resolve(42).then(5,null).then(function(msg){ console.log("msg:" + msg); },null); // (nothing printed)