bug #4598 Sync Error file and line (fabpot)

This PR was merged into the 3.x branch.

Discussion
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Sync Error file and line

The PHP exception file and name go together. So, we should only update the line number only if we have a file.

Commits
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4a121d9 Sync Error file and line

src/Error/Error.php

@@ -106,11 +106,12 @@ public function appendMessage($rawMessage): void
 
     private function updateRepr(): void
     {
-        if ($this->lineno > 0) {
-            $this->line = $this->lineno;
-        }
         if ($this->source && $this->source->getPath()) {
+            // we only update the file and the line together
             $this->file = $this->source->getPath();
+            if ($this->lineno > 0) {
+                $this->line = $this->lineno;
+            }
         }
 
         $this->message = $this->rawMessage;

tests/ErrorTest.php

@@ -15,6 +15,7 @@
 use Twig\Environment;
 use Twig\Error\Error;
 use Twig\Error\RuntimeError;
+use Twig\Error\SyntaxError;
 use Twig\Loader\ArrayLoader;
 use Twig\Loader\FilesystemLoader;
 use Twig\Source;
@@ -234,6 +235,24 @@ public function testTwigArrayReduceThrowsRuntimeExceptions()
         }
     }
 
+    public function testTwigExceptionUpdateFileAndLineTogether()
+    {
+        $twig = new Environment(new ArrayLoader([
+            'index' => "\n\n\n\n{{ foo() }}",
+        ]), ['debug' => true, 'cache' => false]);
+
+        try {
+            $twig->load('index')->render([]);
+        } catch (SyntaxError $e) {
+            $this->assertSame('Unknown "foo" function in "index" at line 5.', $e->getMessage());
+            $this->assertSame(5, $e->getTemplateLine());
+            // as we are using an ArrayLoader, we don't have a file, so the line should not be the template line,
+            // but the line of the error in the Parser.php file
+            $this->assertStringContainsString('Parser.php', $e->getFile());
+            $this->assertNotSame(5, $e->getLine());
+        }
+    }
+
     public static function getErroredTemplates()
     {
         return [