From 3e5aeb02f8af98b7ba863e9e1dfa94ad3d26dcf1 Mon Sep 17 00:00:00 2001
From: def-Param <paramjeetsingh.dev.mail@gmail.com>
Date: Fri, 30 Oct 2026 10:07:31 +0530
Subject: [PATCH] fix(indexed): clamp lastColumn when next section is on same
 line with offset

---
 lib/source-map-consumer.js | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

diff --git a/lib/source-map-consumer.js b/lib/source-map-consumer.js
index 17ef92b1..b2458280 100644
--- a/lib/source-map-consumer.js
+++ b/lib/source-map-consumer.js
@@ -921,10 +921,11 @@ class IndexedSourceMapConsumer extends SourceMapConsumer {
       if (
         generatedPosition.lastColumn === Infinity &&
         nextSection &&
-        generatedPosition.line === nextSection.generatedOffset.generatedLine
+        generatedPosition.line + lineShift ===
+          nextSection.generatedOffset.generatedLine
       ) {
         generatedPosition.lastColumn =
-          nextSection.generatedOffset.generatedColumn - 2;
+          nextSection.generatedOffset.generatedColumn - 2 - columnShift;
       }
       generatedPosition.line += lineShift;
 
@@ -964,10 +965,11 @@ class IndexedSourceMapConsumer extends SourceMapConsumer {
         if (
           generatedPosition.lastColumn === Infinity &&
           nextSection &&
-          generatedPosition.line === nextSection.generatedOffset.generatedLine
+          generatedPosition.line + lineShift ===
+            nextSection.generatedOffset.generatedLine
         ) {
           generatedPosition.lastColumn =
-            nextSection.generatedOffset.generatedColumn - 2;
+            nextSection.generatedOffset.generatedColumn - 2 - columnShift;
         }
         generatedPosition.line += lineShift;
 
@@ -997,10 +999,11 @@ class IndexedSourceMapConsumer extends SourceMapConsumer {
           if (
             mapping.lastGeneratedColumn === Infinity &&
             nextSection &&
-            mapping.generatedLine === nextSection.generatedOffset.generatedLine
+            mapping.generatedLine + lineShift ===
+              nextSection.generatedOffset.generatedLine
           ) {
             mapping.lastGeneratedColumn =
-              nextSection.generatedOffset.generatedColumn - 2;
+              nextSection.generatedOffset.generatedColumn - 2 - columnShift;
           }
           mapping.generatedLine += lineShift;