Rollup of 7 pull requests

[Centril]

Successful merges:

• Expand docs for TryFrom and TryInto. #58015 (Expand docs for TryFrom and TryInto.)
• Use informational target machine for metadata #58605 (Use informational target machine for metadata)
• rust-lldb: fix crash when printing empty string #58629 (rust-lldb: fix crash when printing empty string)
• Put Local, Static and Promoted as one Base variant of Place #58631 (Put Local, Static and Promoted as one Base variant of Place)
• Have all methods of Filter and FilterMap use internal iteration #58730 (Have all methods of Filter and FilterMap use internal iteration)
• Replace s with self in docs for str methods taking self. #58782 (Replace s with self in docs for str methods taking self.)
• allow specifying attributes for tool lints #58785 (allow specifying attributes for tool lints)

Failed merges:

r? @ghost

[Centril]

@bors r+ p=7

[bors]

📌 Commit dadf786 has been approved by Centril

[rust-highfive]

The job x86_64-gnu-llvm-6.0 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.

travis_time:end:1fec1371:start=1551327734658199878,finish=1551327830255679164,duration=95597479286
$ git checkout -qf FETCH_HEAD
travis_fold:end:git.checkout

Encrypted environment variables have been removed for security reasons.
See https://docs.travis-ci.com/user/pull-requests/#pull-requests-and-security-restrictions
$ export SCCACHE_BUCKET=rust-lang-ci-sccache2
$ export SCCACHE_REGION=us-west-1
Setting environment variables from .travis.yml
$ export IMAGE=x86_64-gnu-llvm-6.0
---
travis_time:start:test_debuginfo
Check compiletest suite=debuginfo mode=debuginfo-both (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu)
[01:17:36] 
[01:17:36] running 120 tests
[01:18:05] .iiiii...i.....i..i...i..i.i...i.ii...i.....i..i....i..........iiii..........i...ii...i.......ii.i.i 100/120
[01:18:10] .i......iii.i.....ii
[01:18:10] 
[01:18:10]  finished in 33.834
[01:18:10] travis_fold:end:test_debuginfo

---
[01:29:12] 
[01:29:12]    Doc-tests core
[01:29:18] 
[01:29:18] running 2277 tests
[01:29:31] ....iiiii........................................................................................... 100/2277
[01:29:45] .....................................................................ii.....F....................... 200/2277
[01:30:18] .................................................................................................... 400/2277
[01:30:33] .....................i..i........................................................................... 500/2277
[01:30:47] .................................................................................................... 600/2277
[01:31:01] .................................................................................................... 700/2277
---
[01:35:04] 
[01:35:04] error: test failed, to rerun pass '--doc'
[01:35:04] 
[01:35:04] 
[01:35:04] command did not execute successfully: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage0/bin/cargo" "test" "--target" "x86_64-unknown-linux-gnu" "-j" "4" "--release" "--locked" "--color" "always" "--features" "panic-unwind backtrace" "--manifest-path" "/checkout/src/libstd/Cargo.toml" "-p" "core" "--" "--quiet"
[01:35:04] 
[01:35:04] 
[01:35:04] failed to run: /checkout/obj/build/bootstrap/debug/bootstrap test
[01:35:04] Build completed unsuccessfully in 0:30:17
[01:35:04] Build completed unsuccessfully in 0:30:17
[01:35:04] Makefile:48: recipe for target 'check' failed
[01:35:04] make: *** [check] Error 1
The command "stamp sh -x -c "$RUN_SCRIPT"" exited with 2.
travis_time:start:2a4c4981
$ date && (curl -fs --head https://google.com | grep ^Date: | sed 's/Date: //g' || true)
Thu Feb 28 05:59:04 UTC 2019
---
travis_time:end:03406980:start=1551333546545784497,finish=1551333546551723911,duration=5939414
travis_fold:end:after_failure.3
travis_fold:start:after_failure.4
travis_time:start:0cad00a3
$ 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:03194e53
travis_time:start:03194e53
$ 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:0af78c93
$ dmesg | grep -i kill

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