Use CancellationError to avoid logging of cancels as errors (#7477)

Extension/src/LanguageServer/Providers/foldingRangeProvider.ts

@@ -24,7 +24,7 @@ export class FoldingRangeProvider implements vscode.FoldingRangeProvider {
         token.onCancellationRequested(e => this.client.abortRequest(id));
         const ranges: GetFoldingRangesResult = await this.client.languageClient.sendRequest(GetFoldingRangesRequest, params);
         if (ranges.canceled) {
-            throw new Error('Request for providing folding ranges is cancelled.');
+            throw new vscode.CancellationError();
         } else {
             const result: vscode.FoldingRange[] = [];
             ranges.ranges.forEach((r) => {

Extension/src/LanguageServer/Providers/semanticTokensProvider.ts

@@ -32,10 +32,10 @@ export class SemanticTokensProvider implements vscode.DocumentSemanticTokensProv
             };
             const tokensResult: GetSemanticTokensResult = await this.client.languageClient.sendRequest(GetSemanticTokensRequest, params);
             if (tokensResult.canceled) {
-                throw new Error('Request for providing semantic tokens is cancelled.');
+                throw new vscode.CancellationError();
             } else {
                 if (tokensResult.fileVersion !== openFileVersions.get(uriString)) {
-                    throw new Error('The semantic tokens are not related to the current version of the document.');
+                    throw new vscode.CancellationError();
                 } else {
                     const builder: vscode.SemanticTokensBuilder = new vscode.SemanticTokensBuilder(this.client.semanticTokensLegend);
                     tokensResult.tokens.forEach((token) => {