From daf5d9752de0f29a09a4e5fa11d5aad5de5de984 Mon Sep 17 00:00:00 2001
From: DLynch <dlynch@wikimedia.org>
Date: Tue, 19 Nov 2024 02:02:03 +0000
Subject: [PATCH] Revert "editcheck: Remove try/catch around transaction
 squashing"

This reverts commit cf8a08f76ca7a68978dfea4a8975745208d1224d.

Reason for revert: these errors are still happening

Bug: T333710
Bug: T380234
Change-Id: I4b4a061757316bf720fecc7cfd971737b68d122f
(cherry picked from commit 733d0a835e1716970deaa42b6e34025c55432bd8)
---
 editcheck/modules/init.js | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/editcheck/modules/init.js b/editcheck/modules/init.js
index c9d426cf34..e323db572d 100644
--- a/editcheck/modules/init.js
+++ b/editcheck/modules/init.js
@@ -59,7 +59,16 @@ mw.editcheck.getModifiedRanges = function ( documentModel, coveredNodesOnly ) {
 	if ( !documentModel.completeHistory.getLength() ) {
 		return [];
 	}
-	const operations = documentModel.completeHistory.squash().transactions[ 0 ].operations;
+	let operations;
+	try {
+		operations = documentModel.completeHistory.squash().transactions[ 0 ].operations;
+	} catch ( err ) {
+		// TransactionSquasher can sometimes throw errors; until T333710 is
+		// fixed just count this as not needing a reference.
+		mw.errorLogger.logError( err, 'error.visualeditor' );
+		return [];
+	}
+
 	const ranges = [];
 	let offset = 0;
 	const endOffset = documentModel.getDocumentRange().end;