20724265a3
Changes in Racket 6.4: - 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. |
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