make sure to read setting (microsoft#184040)

d'oh, related to microsoft#173387 (comment)

Author: jrieken

src/vs/editor/contrib/suggest/browser/suggestModel.ts

@@ -30,6 +30,7 @@ import { ILanguageFeaturesService } from 'vs/editor/common/services/languageFeat
 import { FuzzyScoreOptions } from 'vs/base/common/filters';
 import { assertType } from 'vs/base/common/types';
 import { InlineCompletionContextKeys } from 'vs/editor/contrib/inlineCompletions/browser/inlineCompletionContextKeys';
+import { SnippetController2 } from 'vs/editor/contrib/snippet/browser/snippetController2';
 
 export interface ICancelEvent {
 	readonly retrigger: boolean;
@@ -378,6 +379,11 @@ export class SuggestModel implements IDisposable {
 			return;
 		}
 
+		if (this._editor.getOption(EditorOption.suggest).snippetsPreventQuickSuggestions && SnippetController2.get(this._editor)?.isInSnippet()) {
+			// no quick suggestion when in snippet mode
+			return;
+		}
+
 		this.cancel();
 
 		this._triggerQuickSuggest.cancelAndSet(() => {