fix(src): add trap door to alert developer when erroneously re-enteri…

…ng top-level error handler

src/util.ts

@@ -320,6 +320,7 @@ export async function runProgram<
   let configurationHooks: ConfigurationHooks | undefined = undefined;
   let preExecutionContext: PreExecutionContext | undefined = undefined;
   let successfullyHandledErrorViaConfigurationHook = false;
+  let alreadyDidErrorHandling = false;
 
   try {
     if (typeof args[1] === 'string' || Array.isArray(args[1])) {
@@ -393,11 +394,26 @@ export async function runProgram<
     debug_('runProgram invocation succeeded');
     return parsedArgv;
   } catch (error) {
+    if (alreadyDidErrorHandling) {
+      debug_.warn(
+        `discarding exception from ${
+          preExecutionContext ? '::execute' : '::configureProgram'
+        } because error handling already happened: %O`,
+        error
+      );
+
+      debug_.message(
+        'note that seeing the above message may be a code smell. Check the documentation on CliError::dangerouslyFatal for more information'
+      );
+    }
+
+    alreadyDidErrorHandling = true;
+
     debug_.error(
       `handling irrecoverable exception from ${
         preExecutionContext ? '::execute' : '::configureProgram'
       }: %O`,
-      `${error}`
+      error
     );
 
     process.exitCode = isCliError(error)