{"record":{"id":"ecd2a44c9ec11c4b","repo":"twigphp/Twig","slug":"an-exception-has-been-thrown-during-the-compilation-of-a","errorCode":null,"errorMessage":"An exception has been thrown during the compilation of a template (\"%s\").","messagePattern":"An exception has been thrown during the compilation of a template \\(\"(.+?)\"\\)\\.","errorType":"exception","errorClass":"Twig\\Error\\SyntaxError","httpStatus":null,"severity":"error","filePath":"src/Environment.php","lineNumber":594,"sourceCode":"        }\n\n        return $this->compiler->compile($node)->getSource();\n    }\n\n    /**\n     * Compiles a template source code.\n     *\n     * @throws SyntaxError When there was an error during tokenizing, parsing or compiling\n     */\n    public function compileSource(Source $source): string\n    {\n        try {\n            return $this->compile($this->parse($this->tokenize($source)));\n        } catch (Error $e) {\n            $e->setSourceContext($source);\n            throw $e;\n        } catch (\\Exception $e) {\n            throw new SyntaxError(\\sprintf('An exception has been thrown during the compilation of a template (\"%s\").', $e->getMessage()), -1, $source, $e);\n        }\n    }\n\n    /**\n     * @return void\n     */\n    public function setLoader(LoaderInterface $loader)\n    {\n        $this->loader = $loader;\n    }\n\n    public function getLoader(): LoaderInterface\n    {\n        return $this->loader;\n    }\n\n    /**\n     * @return void","sourceCodeStart":576,"sourceCodeEnd":612,"githubUrl":"https://github.com/twigphp/Twig/blob/a414c3a491defb5a60f2fc88ef79ff37c90010cd/src/Environment.php#L576-L612","documentation":"Environment::compileSource wraps any generic \\Exception thrown while tokenizing/parsing/compiling a template into a Twig\\SyntaxError carrying this message, attaching the source context and the original exception as previous. Twig-specific Error instances are rethrown as-is with source context; only non-Twig exceptions get this wrapper.","triggerScenarios":"compileSource()/compile() is called (e.g. from loadTemplate) and a plain \\Exception escapes tokenize(), parse() or compile() — most often a bad method call inside a custom Node, a TypeError from an extension, or a fatal misconfiguration in a custom Lexer/Parser, where the inner message is echoed inside the parentheses.","commonSituations":"A custom Twig extension's node class calling $compiler->subcompile() incorrectly; PHP version upgrade changing an internal API used by an old extension; typo'd function/filter registration leading to a downstream generic exception during compilation.","solutions":["Read the inner exception message in parentheses and the ->getPrevious() exception for the real cause.","Run with debug enabled ($twig->enableDebug()) for a richer trace pointing at the failing template line.","Update or fix the custom extension/Node whose code throws during compilation.","Ensure composer-installed twig/extension-extra or third-party extensions match your Twig version.","Catch Twig\\Error\\SyntaxError in the caller and log $e->getPrevious() for diagnostics."],"exampleFix":"// before (custom Node throwing generic exception)\nclass CustomNode extends Node {\n    public function compile(Compiler $c) { $c->raw($this->badMethod()); }\n}\n\n// after\nclass CustomNode extends Node {\n    public function compile(Compiler $c) { $c->repr($this->getAttribute('value')); }\n}","handlingStrategy":"try-catch","validationCode":"// validate templates at boot (CI-friendly):\nforeach (glob(__DIR__.'/templates/*.twig') as $f) {\n    try { $twig->parse($twig->tokenize(new \\Twig\\Source(file_get_contents($f), $f))); }\n    catch (\\Throwable $e) { throw new RuntimeException(\"Template compile check failed for $f: \".$e->getMessage(), 0, $e); }\n}","typeGuard":null,"tryCatchPattern":"try {\n    $twig->compileSource(new \\Twig\\Source($code, $name));\n} catch (\\Twig\\Error\\SyntaxError $e) {\n    $real = $e->getPrevious();\n    error_log('Compile failed for '.$e->getSourceContext()->getName().': '.($real ? $real->getMessage() : $e->getMessage()));\n}","preventionTips":["Parse/compile all templates in CI (twig lint command) before deployment.","Keep custom extensions' Node classes covered by unit tests.","Pin extension versions compatible with your twig/twig version.","Always inspect getPrevious() — the wrapper message hides the real cause."],"tags":["twig","compilation","syntax-error"],"backgroundTag":"template-compilation-failed","analyzedSha":"a414c3a491defb5a60f2fc88ef79ff37c90010cd","analyzedAt":"2026-09-13T15:10:46.849Z","contentChangedAt":"2026-09-13T15:10:46.849Z","schemaVersion":2},"datasetVersion":"2026-09-16T04:17:20.429Z"}