Add debug-info to access variables from generator state

[Nemo157]

No description provided.

[rust-highfive]

r? @petrochenkov

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[Nemo157]

I previously ran the tests when I first implemented this, but since then I've got a new laptop and haven't been able to get debuginfo tests running properly; hopefully Travis is happy (although, I just figured out a way to manually test it).

This will make all the variables in the generator available even when they haven't been initialized yet (or after they've been de-initialized), I'm not sure if there's an easy way to make it so the correct variables are specified in each state.

[Centril]

Ping from triage @Nemo157 :)

[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:01095d63:start=1550919481497837316,finish=1550919578432629687,duration=96934792371
$ 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
---

[00:03:18] travis_fold:start:tidy
travis_time:start:tidy
tidy check
[00:03:19] tidy error: /checkout/src/librustc_codegen_ssa/mir/mod.rs:629: line longer than 100 chars
[00:03:20] some tidy checks failed
[00:03:20] 
[00:03:20] 
[00:03:20] command did not execute successfully: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage0-tools-bin/tidy" "/checkout/src" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage0/bin/cargo" "--no-vendor" "--quiet"
[00:03:20] 
[00:03:20] 
[00:03:20] failed to run: /checkout/obj/build/bootstrap/debug/bootstrap test src/tools/tidy
[00:03:20] Build completed unsuccessfully in 0:00:47
[00:03:20] Build completed unsuccessfully in 0:00:47
[00:03:20] make: *** [tidy] Error 1
[00:03:20] Makefile:68: recipe for target 'tidy' failed
The command "stamp sh -x -c "$RUN_SCRIPT"" exited with 2.
travis_time:start:2b505f33
$ date && (curl -fs --head https://google.com | grep ^Date: | sed 's/Date: //g' || true)
Sat Feb 23 11:03:09 UTC 2019
---
travis_time:end:256d7549:start=1550919790032538963,finish=1550919790037634066,duration=5095103
travis_fold:end:after_failure.3
travis_fold:start:after_failure.4
travis_time:start:02a0a1d8
$ 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:10ecfcb7
travis_time:start:10ecfcb7
$ 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:02033d00
$ dmesg | grep -i kill

I'm a bot! I can only do what humans tell me to, so if this was not helpful or you have suggestions for improvements, please ping or otherwise contact @TimNN. (Feature Requests)

[Zoxc]

@bors r+

[bors]

📌 Commit 61097bc has been approved by Zoxc

[bors]

⌛ Testing commit 61097bc with merge 9cfed5d...

[bors]

☀️ Test successful - checks-travis, status-appveyor
Approved by: Zoxc
Pushing 9cfed5d to master...