Dislay an error if an exception occurs in the error handler

Related to #1598

2 files changed, 10 insertions, 4 deletions

diff --git a/application/Utils.php b/application/Utils.php
index bcfda65c..37be9a13 100644
--- a/application/Utils.php
+++ b/application/Utils.php
@@ -463,3 +463,12 @@ function t($text, $nText = '', $nb = 1, $domain = 'shaarli')
 {
     return dn__($domain, $text, $nText, $nb);
 }
+
+/**
+ * Converts an exception into a printable stack trace string.
+ */
+function exception2text(Throwable $e): string
+{
+    return $e->getMessage() . PHP_EOL . $e->getFile() . $e->getLine() . PHP_EOL . $e->getTraceAsString();
+}
+
diff --git a/application/front/controller/visitor/ErrorController.php b/application/front/controller/visitor/ErrorController.php
index 10aa84c8..8da11172 100644
--- a/application/front/controller/visitor/ErrorController.php
+++ b/application/front/controller/visitor/ErrorController.php
@@ -28,10 +28,7 @@ class ErrorController extends ShaarliVisitorController
             // Internal error (any other Throwable)
             if ($this->container->conf->get('dev.debug', false)) {
                 $this->assignView('message', $throwable->getMessage());
-                $this->assignView(
-                    'stacktrace',
-                    nl2br(get_class($throwable) .': '. PHP_EOL . $throwable->getTraceAsString())
-                );
+                $this->assignView('stacktrace', exception2text($throwable));
             } else {
                 $this->assignView('message', t('An unexpected error occurred.'));
             }