From 900cdd51ae712f65ba55160ebba13785775e7efa Mon Sep 17 00:00:00 2001
From: Roberto <robertoreale2006@gmail.com>
Date: Tue, 18 Aug 2026 20:59:48 +0200
Subject: [PATCH] fix(intellisense): clamp spell-check start line with Math.max

`Math.min(0, line-1)` is always <= 0, so any edit on line 0 (and every edit
whose start line is 0) builds a Range starting at line -1 and VS Code throws
`Illegal argument: line must be non-negative`. The intent is clearly to look
one line back without going below 0, i.e. `Math.max`.
---
 src/intellisense/langMisspellingCheckProvider.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/intellisense/langMisspellingCheckProvider.ts b/src/intellisense/langMisspellingCheckProvider.ts
index f8a9549e..b5712985 100644
--- a/src/intellisense/langMisspellingCheckProvider.ts
+++ b/src/intellisense/langMisspellingCheckProvider.ts
@@ -227,7 +227,7 @@ export class MisspellingCheckProvider extends IntellisenseProvider implements vs
                     const uri = e.document.uri;
                     for (const event of e.contentChanges) {
                         // extract changed text
-                        const startLine = Math.min(0, event.range.start.line-1);
+                        const startLine = Math.max(0, event.range.start.line-1);
                         const [endLine, maxLength] = (() => {
                             try {
                                 const _line = event.range.end.line;