twigphp/Twig · error · Twig\Error\SyntaxError

An exception has been thrown during the compilation of a…

Error message

An exception has been thrown during the compilation of a template ("%s").

What it means

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.

Solutions

1. Read the inner exception message in parentheses and the ->getPrevious() exception for the real cause.
2. Run with debug enabled ($twig->enableDebug()) for a richer trace pointing at the failing template line.
3. Update or fix the custom extension/Node whose code throws during compilation.
4. Ensure composer-installed twig/extension-extra or third-party extensions match your Twig version.
5. Catch Twig\Error\SyntaxError in the caller and log $e->getPrevious() for diagnostics.

Example fix

// before (custom Node throwing generic exception)
class CustomNode extends Node {
    public function compile(Compiler $c) { $c->raw($this->badMethod()); }
}

// after
class CustomNode extends Node {
    public function compile(Compiler $c) { $c->repr($this->getAttribute('value')); }
}

// validate templates at boot (CI-friendly):
foreach (glob(__DIR__.'/templates/*.twig') as $f) {
    try { $twig->parse($twig->tokenize(new \Twig\Source(file_get_contents($f), $f))); }
    catch (\Throwable $e) { throw new RuntimeException("Template compile check failed for $f: ".$e->getMessage(), 0, $e); }
}

try {
    $twig->compileSource(new \Twig\Source($code, $name));
} catch (\Twig\Error\SyntaxError $e) {
    $real = $e->getPrevious();
    error_log('Compile failed for '.$e->getSourceContext()->getName().': '.($real ? $real->getMessage() : $e->getMessage()));
}

When it happens

Trigger: 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.

Common situations: 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.

Related errors

• Calling the "parent" function outside of a block is…
• Calling the "parent" function on a template that does not…
• Unclosed " ".
• Unexpected character
• You cannot assign a value to

AI-assisted analysis of twigphp/Twig@a414c3a491 (2026-09-13). Data as JSON: /api/errors/ecd2a44c9ec11c4b. Report an issue: GitHub.

Appendix: source

Thrown at src/Environment.php:594

        }

        return $this->compiler->compile($node)->getSource();
    }

    /**
     * Compiles a template source code.
     *
     * @throws SyntaxError When there was an error during tokenizing, parsing or compiling
     */
    public function compileSource(Source $source): string
    {
        try {
            return $this->compile($this->parse($this->tokenize($source)));
        } catch (Error $e) {
            $e->setSourceContext($source);
            throw $e;
        } catch (\Exception $e) {
            throw new SyntaxError(\sprintf('An exception has been thrown during the compilation of a template ("%s").', $e->getMessage()), -1, $source, $e);
        }
    }

    /**
     * @return void
     */
    public function setLoader(LoaderInterface $loader)
    {
        $this->loader = $loader;
    }

    public function getLoader(): LoaderInterface
    {
        return $this->loader;
    }

    /**
     * @return void

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