wasm32-unknown-emscripten expects the rust_eh_personality symbol

[CryZe]

The wasm32-unknown-emscripten expects the rust_eh_personality symbol to be there, but a cfg checking for target_arch = "wasm32" which was meant to remove the symbol from the wasm32-unknown-unknown target, didn't check for whether emscripten is targeted or not, so the symbol accidentally got filtered out there as well.

Fixes #55276

[rust-highfive]

r? @aturon

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[CryZe]

r? @alexcrichton

[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.

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travis_time:end:1d76c642:start=1541642303357824075,finish=1541642304362431234,duration=1004607159
$ 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
---
/usr/local/lib/python2.7/dist-packages/pip/_vendor/requests/packages/urllib3/util/ssl_.py:122: InsecurePlatformWarning: A true SSLContext object is not available. This prevents urllib3 from configuring SSL appropriately and may cause certain SSL connections to fail. You can upgrade to a newer version of Python to solve this. For more information, see https://urllib3.readthedocs.io/en/latest/security.html#insecureplatformwarning.
  InsecurePlatformWarning
/usr/local/lib/python2.7/dist-packages/pip/_vendor/requests/packages/urllib3/util/ssl_.py:122: InsecurePlatformWarning: A true SSLContext object is not available. This prevents urllib3 from configuring SSL appropriately and may cause certain SSL connections to fail. You can upgrade to a newer version of Python to solve this. For more information, see https://urllib3.readthedocs.io/en/latest/security.html#insecureplatformwarning.
  InsecurePlatformWarning
  Downloading https://files.pythonhosted.org/packages/31/a7/a2c20a4269418da40ecd0fa9fa129f694461cb831a7dc83a382e7b694c29/awscli-1.16.50-py2.py3-none-any.whl (1.4MB)
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---
Requirement already satisfied: PyYAML<=3.13,>=3.10 in /usr/lib/python2.7/dist-packages (from awscli)
Collecting botocore==1.12.40 (from awscli)
/usr/local/lib/python2.7/dist-packages/pip/_vendor/requests/packages/urllib3/util/ssl_.py:122: InsecurePlatformWarning: A true SSLContext object is not available. This prevents urllib3 from configuring SSL appropriately and may cause certain SSL connections to fail. You can upgrade to a newer version of Python to solve this. For more information, see https://urllib3.readthedocs.io/en/latest/security.html#insecureplatformwarning.
  InsecurePlatformWarning
  Downloading https://files.pythonhosted.org/packages/69/cc/65f0b4d013ff9698a0f8e85733339ca68be8a744015743cee17123e8bc43/botocore-1.12.40-py2.py3-none-any.whl (4.8MB)
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---
[00:03:54] tidy error: /checkout/src/libpanic_abort/lib.rs:101: trailing whitespace
[00:03:55] some tidy checks failed
[00:03:55] 
[00:03:55] 
[00:03:55] 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"
[00:03:55] 
[00:03:55] 
[00:03:55] failed to run: /checkout/obj/build/bootstrap/debug/bootstrap test src/tools/tidy
[00:03:55] Build completed unsuccessfully in 0:00:47
[00:03:55] Build completed unsuccessfully in 0:00:47
[00:03:55] make: *** [tidy] Error 1
[00:03:55] Makefile:79: recipe for target 'tidy' failed

The command "stamp sh -x -c "$RUN_SCRIPT"" exited with 2.
travis_time:start:028ccec6
$ date && (curl -fs --head https://google.com | grep ^Date: | sed 's/Date: //g' || true)
---
travis_time:end:30090eb8:start=1541642550286224225,finish=1541642550292201601,duration=5977376
travis_fold:end:after_failure.3
travis_fold:start:after_failure.4
travis_time:start:081375cf
$ 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:0159738c
travis_time:start:0159738c
$ 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:0905d1e8
$ dmesg | grep -i kill

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[alexcrichton]

@bors: r+

[bors]

📌 Commit a9b5988 has been approved by alexcrichton