<HTML><BODY>Trying to write documentation --- <pre class="language-lisp"><code class="undefined">#lang scribble/manual @(require (for-label racket)) @title{GObject Introspection} This is Gobject FFI. Usage example: @racketblock[ (gi-ffi gtk "Gtk") (let ([window (gtk 'window 'new)]) (window 'show)) ] --- DrRacket writes in status line: +: contract violation expected: number? given: #f argument position: 1st other arguments...: 0 I push "Check syntax". The window hangs. To be correct, not window, but tab with the document. I still can work with other tabs. </code></pre>Racket 5.3.4, Linux </BODY></HTML>