diff --git a/src/Illuminate/Support/Str.php b/src/Illuminate/Support/Str.php
index ea39ba80be7b..edb9d711b385 100644
--- a/src/Illuminate/Support/Str.php
+++ b/src/Illuminate/Support/Str.php
@@ -16,6 +16,7 @@
 use Ramsey\Uuid\UuidFactory;
 use Symfony\Component\Uid\Ulid;
 use Traversable;
+use Throwable;
 use voku\helper\ASCII;
 
 class Str
@@ -986,12 +987,26 @@ public static function replaceArray($search, $replace, $subject)
         $result = array_shift($segments);
 
         foreach ($segments as $segment) {
-            $result .= (array_shift($replace) ?? $search).$segment;
+            $result .= self::toStringOr(array_shift($replace) ?? $search, $search).$segment;
         }
 
         return $result;
     }
 
+    /**
+     * @param  mixed  $value
+     * @param  string  $fallback
+     * @return string
+     */
+    private static function toStringOr($value, $fallback)
+    {
+        try {
+            return (string) $value;
+        } catch (Throwable $e) {
+            return $search;
+        }
+    }
+
     /**
      * Replace the given value in the given string.
      *
diff --git a/tests/Support/SupportStrTest.php b/tests/Support/SupportStrTest.php
index 73d1770fcb62..62a66737c4aa 100755
--- a/tests/Support/SupportStrTest.php
+++ b/tests/Support/SupportStrTest.php
@@ -594,6 +594,8 @@ public function testReplaceArray()
         // Test for associative array support
         $this->assertSame('foo/bar', Str::replaceArray('?', [1 => 'foo', 2 => 'bar'], '?/?'));
         $this->assertSame('foo/bar', Str::replaceArray('?', ['x' => 'foo', 'y' => 'bar'], '?/?'));
+        // Test does not crash on bad input
+        $this->assertSame('?', Str::replaceArray('?', [(object) ['foo' => 'bar']], '?'));
     }
 
     public function testReplaceFirst()