UnhandledRejection: Non-Error promise rejection captured with keys: [object has no keys]

[jesus2099]

From @reosarevok
https://chatlogs.metabrainz.org/libera/metabrainz/msg/4986408/

jesus2099: we're seeing a fair amount of unhandled exceptions on our sentry monitoring that seem related to "a.jesus2099PendingEditsToggle"
UnhandledRejection: Non-Error promise rejection captured with keys: [object has no keys]
Either that or dd > a#tog81127AcoustID[title="shift+click to hide/show all"]
Which I expect it's also part of the same script or a similar one?
Anyway, maybe you can take a look at it when you have some time, see if you can figure it out, happy to help if useful

If it's a.jesus2099PendingEditsToggle then it's:

konami-command/mb_PENDING-EDITS.user.js

Lines 241 to 250 in d6a3ea4

	li.insertBefore(createTag("a", {a: {class: SCRIPT_KEY + "Toggle"}, s: {position: "absolute", right: "4px"}, e: {click: function(event) {
	var collapse = (this.textContent == expanded);
	for (var options = document.querySelectorAll("ul." + SCRIPT_KEY + "EditList, span." + SCRIPT_KEY + "Help"), o = 0; o < options.length; o++) {
	options[o].style.setProperty("display", collapse ? "none" : (options[o].tagName == "UL" ? "block" : "inline"));
	}
	for (var toggles = document.querySelectorAll("a." + SCRIPT_KEY + "Toggle"), t = 0; t < toggles.length; t++) {
	replaceChildren(document.createTextNode(collapse ? collapsed : expanded), toggles[t]);
	}
	localStorage.setItem(SCRIPT_KEY + "PendingEditLists", collapse ? collapsed : expanded);
	}}}, expandEditLists ? expanded : collapsed), li.firstChild);

But if it's dd > a#tog81127AcoustID[title="shift+click to hide/show all"] then it's:

konami-command/mb_INLINE-STUFF.user.js

Lines 478 to 518 in d6a3ea4

	var typetoggle = cooldd.appendChild(createA(localStorage.getItem("hide" + type + "81127") == "1" ? "show" : "hide", null, "shift+click to hide/show all"));
	typetoggle.style.setProperty("cursor", "pointer");
	typetoggle.setAttribute("id", "tog81127" + type);
	typetoggle.addEventListener("click", function(event) {
	var type = this.getAttribute("id").match(/^tog81127([a-z]+)$/i)[1];
	var show = (this.textContent == "show");
	localStorage.setItem("hide" + type + "81127", show ? "0" : "1");
	var togstuffs = document.getElementsByClassName(type + 81127);
	for (var itog = 0; itog < togstuffs.length; itog++) {
	togstuffs[itog].style.setProperty("display", show ? "block" : "none");
	}
	this.replaceChild(document.createTextNode(show ? "hide" : "show"), this.firstChild);
	if (event.shiftKey && bonusclicks.length == 0) {
	let showHideARSButt = document.querySelector("a." + (show ? "show" : "hide") + "-credits");
	if (showHideARSButt) {
	showHideARSButt[0].click();
	} else {
	var ars = document.querySelectorAll("div.ars");
	for (var iar = 0; iar < ars.length; iar++) {
	ars[iar].style.setProperty("display", show ? "block" : "none");
	}
	}
	let showToolZones = document.querySelectorAll("div#sidebar div#" + userjs + "idcountzone input[type='checkbox']");
	if (showToolZones) {
	for (var stz = 0; stz < showToolZones.length; stz++) {
	if (showToolZones[stz].checked != show) showToolZones[stz].click();
	}
	}
	var otogs = ["AcoustID", "ISRC"];
	for (var iotog = 0; iotog < otogs.length; iotog++) {
	var togid = "tog81127" + otogs[iotog];
	var toglnk = document.getElementById(togid);
	if (this.id != togid && toglnk && toglnk.textContent == (show ? "show" : "hide")) {
	bonusclicks.push(toglnk);
	}
	}
	}
	if (bonusclicks.length > 0) {
	bonusclicks.pop().click();
	}
	}, false); // onclick

Now, erh, Non-Error promise rejection captured? 🤔

[jesus2099]

Thanks @reosarevok!

I don't think PENDING EDITS has any issues, at the moment.

I don't use any promises, I think, but INLINE STUFF does crash since React hydrate is being used in release page: #596.

[jesus2099]

@reosarevok, in fact it is not due to any of my scripts nor to any userscripts at all.
If I switch off Violentmonkey and Stylus completely, it still happen twice on this random page, but I guess everywhere, kind of:

Uncaught (in promise) Error: The message port closed before a response was received.

[jesus2099]

But it seems related to browser.

It happens in:

• Windows* Vivaldi twice per page:
  Uncaught (in promise) Error: The message port closed before a response was received.
• Windows* Edge once per page:
  Unchecked runtime.lastError: Could not establish connection. Receiving end does not exist.

It does not happen in:

• Linux Firefox
• Windows* Chrome
• Windows* Firefox

* behind company proxy/firewall.