rust/src/libstd/error.rs, branch 1.34.2

Destabilize the `Error::type_id` function

2019-05-13T15:17:37+00:00

This commit destabilizes the `Error::type_id` function in the standard library. This does so by effectively reverting #58048, restoring the `#[unstable]` attribute. The security mailing list has recently been notified of a vulnerability relating to the stabilization of this function. First stabilized in Rust 1.34.0, a stable function here allows users to implement a custom return value for this function: struct MyType; impl Error for MyType { fn type_id(&self) -> TypeId { // Enable safe casting to `String` by accident. TypeId::of::() } } This, when combined with the `Error::downcast` family of functions, allows safely casting a type to any other type, clearly a memory safety issue! A security announcement will be shortly posted to the security mailing list as well as the Rust Blog, and when those links are available they'll be filled in for this PR as well. This commit simply destabilizes the `Error::type_id` which, although breaking for users since Rust 1.34.0, is hoped to have little impact and has been deemed sufficient to mitigate this issue for the stable channel. The long-term fate of the `Error::type_id` API will be discussed at #60784.

Remove #[doc(hidden)] from Error::type_id

2019-04-06T19:18:46+00:00

Auto merge of #58302 - SimonSapin:tryfrom, r=alexcrichton

2019-02-25T20:24:10+00:00

Stabilize TryFrom and TryInto with a convert::Infallible empty enum This is the plan proposed in https://github.com/rust-lang/rust/issues/33417#issuecomment-423073898

Fix tracking issue for error iterators

2019-02-16T20:16:18+00:00

Stabilize TryFrom and TryInto

2019-02-13T17:00:18+00:00

Rollup merge of #58289 - haraldh:master, r=sfackler

2019-02-13T03:37:05+00:00

impl iter() for dyn Error Examples: ```rust let next_error_type_a = err .iter() .filter_map(Error::downcast_ref::) .next(); ``` ```rust let source_root_error = err.iter().last(); ``` Credit for the ErrorIter goes to reddit user /u/tdiekmann (Tim Diekmann) https://www.reddit.com/r/rust/comments/aj3lpg/is_an_iterator_impl_over_errorsource_possible/

libs: doc comments

2019-02-10T23:57:25+00:00

impl iter_sources() and iter_chain() for dyn Error

2019-02-09T15:04:25+00:00

Examples: ```rust let next_error_type_a = err .iter_chain() .filter_map(Error::downcast_ref::) .next(); ``` ```rust let source_root_error = err.iter_chain().last(); ``` Credit for the ErrorIter goes to Tim Diekmann https://www.reddit.com/r/rust/comments/aj3lpg/is_an_iterator_impl_over_errorsource_possible/

Stabilize std::error::Error::type_id

2019-02-01T10:29:02+00:00

This should have been part of https://github.com/rust-lang/rust/pull/57834 FCP: https://github.com/rust-lang/rust/issues/27745#issuecomment-373906749

Change std::error::Error trait documentation to talk about `source` instead of `cause`

2019-01-08T22:45:54+00:00