Racket version 6.4 is now available from http://racket-lang.org/
- We fixed a security vulnerability in the web server. The existing web server is vulnerable to a navigation attack if it is also enabled to serve files statically; that is, any file readable by the web server is accessible remotely. For more information see http://blog.racket-lang.org/2016/02/racket-web-server-security-vulnerability.html - DrRacket's scrolling is faster. - Incremental garbage-collection mode can eliminate long pauses in a program. For example, incremental mode is useful for avoiding pauses in games and animations. Programs must specifically request incremental mode with `(collect-garbage 'incremental)`, but libraries such as `2htdp/universe` include the request as part of the library's implementation. - The default package catalog is an HTTPS address instead of HTTP, and package operations properly validate server certificates when using HTTPS. - Documentation may define their own categories for the manual top- level page by using strings, rather than only symbols that name pre-defined categories. - The Racket cheat sheet is included in the main distribution. - DrRacket is available in Bulgarian, thanks to Alexander Shopov. - The contract Typed Racket generates for the `Any` type is more permissive, allowing more typed/untyped programs to work without contract errors. - Redex supports binding specifications; describe which variables bind in which expressions and your metafunctions and reduction relations automatically become scope-sensitive. Thanks to Paul Stansifer for this improvement. - All `pict` functions accept `pict-convertible`s. This allows for transparent interoperability between `pict` and libraries like `2htdp/image`. - The `raco profile` and `raco contract-profile` commands provide easy access to profiling tools, without requiring program modifications. Feedback Welcome -- You received this message because you are subscribed to the Google Groups "Racket Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to racket-users+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.