fix / only provide code actions if diagnostic line has same code as during analysis

src/extension.ts

@@ -634,9 +634,11 @@ async function runCppcheckOnFileXML(
                 } : e.$.id;
 
                 // If warning has a symbol we keep track of it
-                if (e.symbol?.[0]) {
-                    diagnosticMetadataStore.set(diagnostic, {symbolName: e.symbol?.[0]});
-                }
+                const symbolName = e.symbol?.[0] ?? '';
+                // Save line of code at main location if we can access it
+                const mainLocLine = mainLocDocument?.lineAt(line)?.text ?? '';
+
+                diagnosticMetadataStore.set(diagnostic, {symbolName, mainLocLine});
 
                 // Related Information
                 const relatedInfos: vscode.DiagnosticRelatedInformation[] = [];

src/util/codeActions.ts

@@ -21,6 +21,15 @@ export class CodeActionProvider implements vscode.CodeActionProvider {
                 continue;
             }
 
+            const mainLocLineNumber = diagnostic.range.start.line;
+            const lineText = document.lineAt(mainLocLineNumber).text;
+            const expectedLineText = this.metadataStore.get(diagnostic)?.mainLocLine;
+
+            // If document has been edited so that diagnostic no longer refers to the correct line we don't provide code actions
+            if (lineText !== expectedLineText) {
+                continue;
+            }
+
             var diagnosticCode = diagnostic.code;
             if (typeof(diagnosticCode) === "object" && typeof(diagnosticCode) !== null) {
                 diagnosticCode = diagnosticCode.value;
@@ -33,7 +42,6 @@ export class CodeActionProvider implements vscode.CodeActionProvider {
             );
 
             // Copy indentation from line affected by diagnostic
-            const lineText = document.lineAt(diagnostic.range.start.line).text;
             const indent = lineText.match(/^\s*/)?.[0] ?? "";
 
             // Insert suppression comment above affected line

src/util/diagnostics.ts

@@ -2,6 +2,7 @@ import * as vscode from 'vscode';
 
 interface DiagnosticMetadata {
     symbolName?: string;
+    mainLocLine?: string;
 }
 
 export class DiagnosticMetadataStore {