cancel input before executing new command; fixes #106743

src/vs/workbench/contrib/debug/node/terminals.ts

@@ -95,8 +95,12 @@ export function prepareCommand(shell: string, args: string[], cwd?: string, env?
 	}
 
 	let quote: (s: string) => string;
+
+	// cancel the current input (to avoid executing the command accidentally)
+	let command = '\u0003'; // Control-C
+
 	// begin command with a space to avoid polluting shell history
-	let command = ' ';
+	command += ' ';
 
 	switch (shellType) {