Rollup of 4 pull requests

[Centril]

Successful merges:

• Update stdsimd #61540 (Update stdsimd)
• Change visit api #61554 (Change visit api)
• Make visitors iterate #61559 (Make visitors iterate)
• Update .mailmap with my name #61585 (Update .mailmap with my name)

Failed merges:

r? @ghost

[Centril]

@bors r+ rollup=never p=4

[bors]

📌 Commit a64640a has been approved by Centril

[Centril]

@bors retry

[bors]

⌛ Testing commit a64640a with merge 70de6e78a857c86081c09e2219e26eacf63e9ca4...

[rust-highfive]

The job dist-powerpc64-linux of your PR failed on Travis (raw log). Through arcane magic we have determined that the following fragments from the build log may contain information about the problem.

Click to expand the log.

[00:25:54]    Compiling autocfg v0.1.4
[00:25:55] error[E0433]: failed to resolve: use of undeclared type or module `core`
[00:25:55]    --> src/libcore/../stdsimd/crates/core_arch/src/powerpc/altivec.rs:288:14
[00:25:55]     |
[00:25:55] 286 | / macro_rules! impl_neg {
[00:25:55] 287 | |     ($s: ident : $zero: expr) => {
[00:25:55] 288 | |         impl core::ops::Neg for s_t_l!($s) {
[00:25:55]     | |              ^^^^ use of undeclared type or module `core`
[00:25:55] 289 | |             type Output = s_t_l!($s);
[00:25:55] 295 | |     };
[00:25:55] 296 | | }
[00:25:55] 296 | | }
[00:25:55]     | |_- in this expansion of `impl_neg!`
[00:25:55] 297 | 
[00:25:55] 298 |   impl_neg! { i8x16 : 0 }
[00:25:55] 
[00:25:55] error[E0433]: failed to resolve: use of undeclared type or module `core`
[00:25:55]    --> src/libcore/../stdsimd/crates/core_arch/src/powerpc/altivec.rs:288:14
[00:25:55]     |
[00:25:55]     |
[00:25:55] 286 | / macro_rules! impl_neg {
[00:25:55] 287 | |     ($s: ident : $zero: expr) => {
[00:25:55] 288 | |         impl core::ops::Neg for s_t_l!($s) {
[00:25:55]     | |              ^^^^ use of undeclared type or module `core`
[00:25:55] 289 | |             type Output = s_t_l!($s);
[00:25:55] 295 | |     };
[00:25:55] 296 | | }
[00:25:55] 296 | | }
[00:25:55]     | |_- in this expansion of `impl_neg!`
[00:25:55] ...
[00:25:55] 299 |   impl_neg! { i16x8 : 0 }
[00:25:55] 
[00:25:55] error[E0433]: failed to resolve: use of undeclared type or module `core`
[00:25:55]    --> src/libcore/../stdsimd/crates/core_arch/src/powerpc/altivec.rs:288:14
[00:25:55]     |
[00:25:55]     |
[00:25:55] 286 | / macro_rules! impl_neg {
[00:25:55] 287 | |     ($s: ident : $zero: expr) => {
[00:25:55] 288 | |         impl core::ops::Neg for s_t_l!($s) {
[00:25:55]     | |              ^^^^ use of undeclared type or module `core`
[00:25:55] 289 | |             type Output = s_t_l!($s);
[00:25:55] 295 | |     };
[00:25:55] 296 | | }
[00:25:55] 296 | | }
[00:25:55]     | |_- in this expansion of `impl_neg!`
[00:25:55] ...
[00:25:55] 300 |   impl_neg! { i32x4 : 0 }
[00:25:55] 
[00:25:55] error[E0433]: failed to resolve: use of undeclared type or module `core`
[00:25:55]    --> src/libcore/../stdsimd/crates/core_arch/src/powerpc/altivec.rs:288:14
[00:25:55]     |
[00:25:55]     |
[00:25:55] 286 | / macro_rules! impl_neg {
[00:25:55] 287 | |     ($s: ident : $zero: expr) => {
[00:25:55] 288 | |         impl core::ops::Neg for s_t_l!($s) {
[00:25:55]     | |              ^^^^ use of undeclared type or module `core`
[00:25:55] 289 | |             type Output = s_t_l!($s);
[00:25:55] 295 | |     };
[00:25:55] 296 | | }
[00:25:55] 296 | | }
[00:25:55]     | |_- in this expansion of `impl_neg!`
[00:25:55] ...
[00:25:55] 301 |   impl_neg! { f32x4 : 0f32 }
[00:25:55] 
[00:25:56]    Compiling backtrace v0.3.29
[00:25:58] error: aborting due to 4 previous errors
[00:25:58] 
---
travis_time:end:22b23230:start=1559835830054356504,finish=1559835830061972603,duration=7616099
travis_fold:end:after_failure.3
travis_fold:start:after_failure.4
travis_time:start:11f45d2f
$ ln -s . checkout && for CORE in obj/cores/core.*; do EXE=$(echo $CORE | sed 's|obj/cores/core\.[0-9]*\.!checkout!\(.*\)|\1|;y|!|/|'); if [ -f "$EXE" ]; then printf travis_fold":start:crashlog\n\033[31;1m%s\033[0m\n" "$CORE"; gdb --batch -q -c "$CORE" "$EXE" -iex 'set auto-load off' -iex 'dir src/' -iex 'set sysroot .' -ex bt -ex q; echo travis_fold":"end:crashlog; fi; done || true
travis_fold:end:after_failure.4
travis_fold:start:after_failure.5
travis_time:start:1326e9b8
travis_time:start:1326e9b8
$ cat ./obj/build/x86_64-unknown-linux-gnu/native/asan/build/lib/asan/clang_rt.asan-dynamic-i386.vers || true
cat: ./obj/build/x86_64-unknown-linux-gnu/native/asan/build/lib/asan/clang_rt.asan-dynamic-i386.vers: No such file or directory
travis_fold:end:after_failure.5
travis_fold:start:after_failure.6
travis_time:start:0bc15940
$ dmesg | grep -i kill

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