Show internal errors that occured when generating a baseline

src/Command/AnalyseCommand.php

@@ -29,6 +29,8 @@
 use Throwable;
 use function array_intersect;
 use function array_map;
+use function array_unique;
+use function array_values;
 use function count;
 use function dirname;
 use function filesize;
@@ -323,7 +325,17 @@ protected function execute(InputInterface $input, OutputInterface $output): int
 				return $inceptionResult->handleReturn(1, $analysisResult->getPeakMemoryUsageBytes());
 			}
 			if ($analysisResult->hasInternalErrors()) {
-				$inceptionResult->getStdOutput()->getStyle()->error('An internal error occurred. Baseline could not be generated. Re-run PHPStan without --generate-baseline to see what\'s going on.');
+				$internalErrors = array_values(array_unique($analysisResult->getInternalErrors()));
+
+				foreach ($internalErrors as $internalError) {
+					$inceptionResult->getStdOutput()->writeLineFormatted($internalError);
+					$inceptionResult->getStdOutput()->writeLineFormatted('');
+				}
+
+				$inceptionResult->getStdOutput()->getStyle()->error(sprintf(
+					'%s occurred. Baseline could not be generated.',
+					count($internalErrors) === 1 ? 'An internal error' : 'Internal errors',
+				));
 
 				return $inceptionResult->handleReturn(1, $analysisResult->getPeakMemoryUsageBytes());
 			}