Using `if [ ! isCI ] || ...` doesn't run any command, just tests `isCI`
as a string, whereas `if ! isCI || ...` will actually run the `isCI`
command and negate its exit status.

add ExitStatusExt into prelude

Fixes an error introduced in rust-lang#66750 where wasi executables always think
they have zero arguments because one of the vectors returned here
accidentally thought it was length 0.

This commit updates the `wasi-libc` repository used to build the
wasm32-wasi target's libstd to ensure that both libstd and libc are
using the same wasi snapshot version.

VxWorks: fix issues in accessing environment variables

…crichton

Tweak wording of `collect()` on bad target type

Fix rust-lang#60440.

…r=Dylan-DPC

Clean up error codes

r? @Dylan-DPC

[CI] fix the `! isCI` check in src/ci/run.sh

Using `if [ ! isCI ] || ...` doesn't run any command, just tests `isCI`
as a string, whereas `if ! isCI || ...` will actually run the `isCI`
command and negate its exit status.

…Gomez

Add long error for E0631 and update ui tests.

This PR adds a long error for `E0631`, which covers errors where closure argument types are mismatched. It also updates UI tests where this error is applicable.

Part of rust-lang#61137

…s-2, r=Dylan-DPC

cleanup long error explanations

r? @Dylan-DPC

Fix docs for formatting delegations

If you use the example in the docs right now it breaks all the options Formatters have to offer.
i.e. https://play.rust-lang.org/?version=stable&mode=debug&edition=2018&gist=214392ecc6eff73b4789c32568395f72 this should've padded the output with 4 zeros but didn't.

with the new example it does work: https://play.rust-lang.org/?version=stable&mode=debug&edition=2018&gist=3bdfb29f395230c5129c5f56dcfcb2a9

The only thing i'm not quite sure about is what's the right way to do it in a loop (altough non of the docs talk about it people are doing it in the wild and there were a couple of attempts to include in libcore)
i.e. https://play.rust-lang.org/?version=stable&mode=debug&edition=2018&gist=4c4dca3c90ba36779ecd014f3899ab9c

add ExitStatusExt into prelude

r? @alexcrichton

Fix fetching arguments on the wasm32-wasi target

Fixes an error introduced in rust-lang#66750 where wasi executables always think
they have zero arguments because one of the vectors returned here
accidentally thought it was length 0.

…rk-Simulacrum

Update the revision of wasi-libc used in wasm32-wasi

This commit updates the `wasi-libc` repository used to build the
wasm32-wasi target's libstd to ensure that both libstd and libc are
using the same wasi snapshot version.