Fix #56237: normalize type before deferred sizedness checking.

[qnighy]

This seems to fix #56237, which was introduced by #56045. I don't thoroughly understand how this works, but the problem seemed to be a lack of normalization.

r? @cramertj

[rust-highfive]

The job x86_64-gnu-llvm-5.0 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:12863198:start=1543329927958227388,finish=1543329929139532968,duration=1181305580
$ 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-5.0
---
[00:46:25] .................................................................................................... 2100/5064
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[00:46:33] .................................................................................................... 2300/5064
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[00:46:57] .................................................................................................... 3000/5064
---
[00:47:57] failures:
[00:47:57] 
[00:47:57] ---- [ui] ui/issues/issue-35570.rs stdout ----
[00:47:57] 
[00:47:57] error: test compilation failed although it shouldn't!
[00:47:57] status: exit code: 101
[00:47:57] command: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/src/test/ui/issues/issue-35570.rs" "--target=x86_64-unknown-linux-gnu" "--error-format" "json" "-Zui-testing" "--emit" "metadata" "-C" "prefer-dynamic" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/issues/issue-35570/a" "-Crpath" "-O" "-Zunstable-options" "-Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "-L" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/issues/issue-35570/auxiliary" "-A" "unused"
[00:47:57] ------------------------------------------
[00:47:57] 
[00:47:57] ------------------------------------------
[00:47:57] stderr:
[00:47:57] stderr:
[00:47:57] ------------------------------------------
[00:47:57] {"message":"src/librustc/infer/lexical_region_resolve/mod.rs:269: cannot relate region: LUB(ReErased, ReEmpty)","code":null,"level":"error: internal compiler error","spans":[],"children":[],"rendered":"error: internal compiler error: src/librustc/infer/lexical_region_resolve/mod.rs:269: cannot relate region: LUB(ReErased, ReEmpty)\n\n"}
[00:47:57] note: Run with `RUST_BACKTRACE=1` for a backtrace.
[00:47:57] note: Run with `RUST_BACKTRACE=1` for a backtrace.
[00:47:57] {"message":"aborting due to previous error","code":null,"level":"error","spans":[],"children":[],"rendered":"error: aborting due to previous error\n\n"}
[00:47:57] note: the compiler unexpectedly panicked. this is a bug.
[00:47:57] 
[00:47:57] note: we would appreciate a bug report: https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.md#bug-reports
[00:47:57] 
[00:47:57] 
[00:47:57] note: rustc 1.32.0-dev running on x86_64-unknown-linux-gnu
[00:47:57] 
[00:47:57] note: compiler flags: -Z ui-testing -Z unstable-options -C prefer-dynamic -C rpath
[00:47:57] 
[00:47:57] ------------------------------------------
[00:47:57] 
[00:47:57] thread '[ui] ui/issues/issue-35570.rs' panicked at 'explicit panic', src/tools/compiletest/src/runtest.rs:3282:9
---
[00:47:57] 
[00:47:57] thread 'main' panicked at 'Some tests failed', src/tools/compiletest/src/main.rs:503:22
[00:47:57] 
[00:47:57] 
[00:47:57] command did not execute successfully: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage0-tools-bin/compiletest" "--compile-lib-path" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/lib" "--run-lib-path" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/lib/rustlib/x86_64-unknown-linux-gnu/lib" "--rustc-path" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "--src-base" "/checkout/src/test/ui" "--build-base" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui" "--stage-id" "stage2-x86_64-unknown-linux-gnu" "--mode" "ui" "--target" "x86_64-unknown-linux-gnu" "--host" "x86_64-unknown-linux-gnu" "--llvm-filecheck" "/usr/lib/llvm-5.0/bin/FileCheck" "--host-rustcflags" "-Crpath -O -Zunstable-options " "--target-rustcflags" "-Crpath -O -Zunstable-options  -Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "--docck-python" "/usr/bin/python2.7" "--lldb-python" "/usr/bin/python2.7" "--gdb" "/usr/bin/gdb" "--quiet" "--llvm-version" "5.0.0\n" "--system-llvm" "--cc" "" "--cxx" "" "--cflags" "" "--llvm-components" "" "--llvm-cxxflags" "" "--adb-path" "adb" "--adb-test-dir" "/data/tmp/work" "--android-cross-path" "" "--color" "always"
[00:47:57] 
[00:47:57] 
[00:47:57] failed to run: /checkout/obj/build/bootstrap/debug/bootstrap test
[00:47:57] Build completed unsuccessfully in 0:03:41
[00:47:57] Build completed unsuccessfully in 0:03:41
[00:47:57] Makefile:58: recipe for target 'check' failed
[00:47:57] make: *** [check] Error 1
The command "stamp sh -x -c "$RUN_SCRIPT"" exited with 2.
travis_time:start:0438f1c2
$ date && (curl -fs --head https://google.com | grep ^Date: | sed 's/Date: //g' || true)
Tue Nov 27 15:33:35 UTC 2018
---
travis_time:end:020eaec6:start=1543332816942218865,finish=1543332816949500195,duration=7281330
travis_fold:end:after_failure.4
travis_fold:start:after_failure.5
travis_time:start:0e9b0f07
$ 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:0061595a
$ 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)

[cramertj]

r? @nikomatsakis

[nikomatsakis]

@bors r+ p=1

[bors]

📌 Commit 8cab350 has been approved by nikomatsakis

[bors]

⌛ Testing commit 8cab350 with merge cd48ce1...

[bors]

☀️ Test successful - status-appveyor, status-travis
Approved by: nikomatsakis
Pushing cd48ce1 to master...

[pnkfelix]

Discussed at T-compiler meeting. accepted for backport to beta.

[qnighy]

@pnkfelix shall I prepare the backport by myself, or should I just wait for someone to do this?

[pnkfelix]

@qnighy most often i find that beta-accepted PR's are handled via rollups of a bunch of beta-accepted PR's at once, as you can see on PR #56930.

[qnighy]

@pnkfelix thanks, then I'll leave it untouched.