add global consistency check

src/js/consistencyCheck.js

+/* checks V.slaves for consistency */
+$(document).on(":passagestart", event => {
+	if (event.passage.title !== "AS Dump" // Don't put in the work on passages we leave immediately anyway.
+		&& V.slaves !== undefined) { // no V.slaves at game start
+		if (V.slaves.includes(null)) {
+			const p = document.createElement("p");
+			p.append(App.UI.DOM.makeElement("span", "ERROR: Main slaves array contains a null entry! Please report this. ", "error"),
+				// we can't reload the passage as we could be on a passage that changes the game state.
+				App.UI.DOM.link("Fix for next passage.", () => { V.slaves.delete(null); }));
+			event.content.append(p);
+		} else {
+			// This part would break with a null entry.
+			_(V.slaves).countBy(s => s.ID)
+				.pickBy(count => count > 1)
+				.keys()
+				.map(id => Number(id))
+				.value()
+				.forEach(id => {
+					event.content.append(App.UI.DOM.makeElement("p", `Duplicate slave ID ${id} at indices ${
+						_(V.slaves)
+							.map((s, idx) => ({
+								ID: s.ID, idx: idx, name: s.slaveName, assignment: s.assignment
+							}))
+							.filter(s => s.ID === id)
+							.map(s => s.idx + ': ' + s.name + ' (' + s.assignment + ')')
+							.join(', ')
+					}`, "error"));
+				});
+		}
+	}
+});

src/uncategorized/main.tw

@@ -16,9 +16,6 @@
 <</if>>
 
 /* extra sanity checks and repair */
-<<if $slaves.includes(null)>>
-	<br><br>@@.red;ERROR: Main slaves array contains a null entry! Please report this.@@ <<link "Repair">><<set $slaves.delete(null)>><</link>><<goto "Main">><br><br>
-<</if>>
 <span id="NaNArray">
 <<if $NaNArray.length > 0>>
 	<br><br>@@.red; ERROR: The following variables are NaN! Please report this.@@<br>
@@ -36,13 +33,6 @@
 	<br><br>@@.red;ERROR: Your husk slave order has taken on a mutated life of its own and has been summarily shot. Refile your husk slave order, if necessary, and notify the appropriate authorities if you see this message again.@@<br><br>
 	<<set $huskSlave = new App.Entity.CustomSlaveOrder()>>
 <</if>>
-
-<<set _duplicateSlaves = _($slaves).countBy(s => s.ID).pickBy(v => v > 1).keys().map(v => Number(v)).value()>>
-<<for _i range _duplicateSlaves>>
-	<br><br>@@.red;Duplicate slave ID _i at indices
-	<<= _($slaves).map((s, idx) => ({ID: s.ID, idx: idx, name: s.slaveName, assignment: s.assignment})).filter(s => s.ID === _i).map(s => s.idx + ' - ' + s.name + ' (' + s.assignment + ')').join(', ')>>@@
-<</for>>
-
 /* end extra sanity checks and repair */