Auto merge of #75199 - Mark-Simulacrum:debug-asserts, r=pietroalbini

Re-enable debug and LLVM assertions

Historically we've disabled these assertions on a number of platforms with the
goal of speeding up CI. Now, though, having migrated to GitHub actions, CI is
already pretty fast, and these debug assertions do bring us some value.

This does leave in some debug assertions that are performance-related: macOS
currently hovers at just under 2 hours.

There are also some other builders which have debug and LLVM assertions
disabled:

llvm-8, PR builder:

In one view, this builder tests our support for older LLVMs. But in reality, a
lot of our tests already disable themselves on older LLVMs, and I think our
general stance is that we really only support the in-tree LLVM. Plus, we really
want CI times on this builder to be really low, as it's run on *every* PR --
that's a lot of CI time.

test-various:

This disables debug asserts still -- as noted in the Dockerfile, we test code
size, and we need debug asserts off for that to work well.

Helps with #59637 -- but doesn't close it, macOS still has asserts off.

r? `@pietroalbini`

Author: bors

.github/workflows/ci.yml

@@ -321,8 +321,6 @@ jobs:
             env:
               RUST_CONFIGURE_ARGS: "--build=x86_64-pc-windows-msvc --enable-profiler"
               SCRIPT: make ci-subset-1
-              NO_DEBUG_ASSERTIONS: 1
-              NO_LLVM_ASSERTIONS: 1
             os: windows-latest-xl
           - name: x86_64-msvc-2
             env:
@@ -333,23 +331,17 @@ jobs:
             env:
               RUST_CONFIGURE_ARGS: "--build=i686-pc-windows-msvc"
               SCRIPT: make ci-subset-1
-              NO_DEBUG_ASSERTIONS: 1
-              NO_LLVM_ASSERTIONS: 1
             os: windows-latest-xl
           - name: i686-msvc-2
             env:
               RUST_CONFIGURE_ARGS: "--build=i686-pc-windows-msvc"
               SCRIPT: make ci-subset-2
-              NO_DEBUG_ASSERTIONS: 1
-              NO_LLVM_ASSERTIONS: 1
             os: windows-latest-xl
           - name: x86_64-msvc-cargo
             env:
               SCRIPT: python x.py --stage 2 test src/tools/cargotest src/tools/cargo
               RUST_CONFIGURE_ARGS: "--build=x86_64-pc-windows-msvc --enable-lld"
               VCVARS_BAT: vcvars64.bat
-              NO_DEBUG_ASSERTIONS: 1
-              NO_LLVM_ASSERTIONS: 1
             os: windows-latest-xl
           - name: x86_64-msvc-tools
             env:
@@ -361,8 +353,6 @@ jobs:
               RUST_CONFIGURE_ARGS: "--build=i686-pc-windows-gnu"
               SCRIPT: make ci-mingw-subset-1
               CUSTOM_MINGW: 1
-              NO_DEBUG_ASSERTIONS: 1
-              NO_LLVM_ASSERTIONS: 1
             os: windows-latest-xl
           - name: i686-mingw-2
             env:
@@ -375,8 +365,6 @@ jobs:
               SCRIPT: make ci-mingw-subset-1
               RUST_CONFIGURE_ARGS: "--build=x86_64-pc-windows-gnu --enable-profiler"
               CUSTOM_MINGW: 1
-              NO_DEBUG_ASSERTIONS: 1
-              NO_LLVM_ASSERTIONS: 1
             os: windows-latest-xl
           - name: x86_64-mingw-2
             env:

src/ci/docker/host-x86_64/i686-gnu-nopt/Dockerfile

@@ -27,6 +27,3 @@ RUN echo "optimize = false" >> /config/nopt-std-config.toml
 ENV RUST_CONFIGURE_ARGS --build=i686-unknown-linux-gnu --disable-optimize-tests
 ENV SCRIPT python3 ../x.py test --stage 0 --config /config/nopt-std-config.toml library/std \
   && python3 ../x.py --stage 2 test
-
-# FIXME(#59637) takes too long on CI right now
-ENV NO_LLVM_ASSERTIONS=1 NO_DEBUG_ASSERTIONS=1

src/ci/docker/host-x86_64/i686-gnu/Dockerfile

@@ -28,6 +28,3 @@ ENV SCRIPT python3 ../x.py --stage 2 test \
   --exclude src/test/rustdoc-js \
   --exclude src/tools/error_index_generator \
   --exclude src/tools/linkchecker
-
-# FIXME(#59637) takes too long on CI right now
-ENV NO_LLVM_ASSERTIONS=1 NO_DEBUG_ASSERTIONS=1

src/ci/docker/host-x86_64/x86_64-gnu-distcheck/Dockerfile

@@ -22,10 +22,3 @@ RUN sh /scripts/sccache.sh
 ENV RUST_CONFIGURE_ARGS --build=x86_64-unknown-linux-gnu --set rust.ignore-git=false
 ENV SCRIPT python3 ../x.py --stage 2 test distcheck
 ENV DIST_SRC 1
-
-# The purpose of this builder is to test that we can `./x.py --stage 2 test` successfully
-# from a tarball, not to test LLVM/rustc's own set of assertions. These cause a
-# significant hit to CI compile time (over a half hour as observed in #61185),
-# so disable assertions for this builder.
-ENV NO_LLVM_ASSERTIONS=1
-ENV NO_DEBUG_ASSERTIONS=1

src/ci/docker/host-x86_64/x86_64-gnu-llvm-8/Dockerfile

@@ -57,9 +57,3 @@ ENV SCRIPT python2.7 ../x.py --stage 2 test --exclude src/tools/tidy && \
            python2.7 ../x.py --stage 2 test src/test/ui --pass=check && \
            # Run tidy at the very end, after all the other tests.
            python2.7 ../x.py --stage 2 test src/tools/tidy
-
-# The purpose of this container isn't to test with debug assertions and
-# this is run on all PRs, so let's get speedier builds by disabling these extra
-# checks.
-ENV NO_DEBUG_ASSERTIONS=1
-ENV NO_LLVM_ASSERTIONS=1

src/ci/github-actions/ci.yml

@@ -500,9 +500,6 @@ jobs:
             env:
               RUST_CONFIGURE_ARGS: --build=x86_64-pc-windows-msvc --enable-profiler
               SCRIPT: make ci-subset-1
-              # FIXME(#59637)
-              NO_DEBUG_ASSERTIONS: 1
-              NO_LLVM_ASSERTIONS: 1
             <<: *job-windows-xl
 
           - name: x86_64-msvc-2
@@ -515,28 +512,19 @@ jobs:
             env:
               RUST_CONFIGURE_ARGS: --build=i686-pc-windows-msvc
               SCRIPT: make ci-subset-1
-              # FIXME(#59637)
-              NO_DEBUG_ASSERTIONS: 1
-              NO_LLVM_ASSERTIONS: 1
             <<: *job-windows-xl
 
           - name: i686-msvc-2
             env:
               RUST_CONFIGURE_ARGS: --build=i686-pc-windows-msvc
               SCRIPT: make ci-subset-2
-              # FIXME(#59637)
-              NO_DEBUG_ASSERTIONS: 1
-              NO_LLVM_ASSERTIONS: 1
             <<: *job-windows-xl
 
           - name: x86_64-msvc-cargo
             env:
               SCRIPT: python x.py --stage 2 test src/tools/cargotest src/tools/cargo
               RUST_CONFIGURE_ARGS: --build=x86_64-pc-windows-msvc --enable-lld
               VCVARS_BAT: vcvars64.bat
-              # FIXME(#59637)
-              NO_DEBUG_ASSERTIONS: 1
-              NO_LLVM_ASSERTIONS: 1
             <<: *job-windows-xl
 
           - name: x86_64-msvc-tools
@@ -566,9 +554,6 @@ jobs:
               RUST_CONFIGURE_ARGS: --build=i686-pc-windows-gnu
               SCRIPT: make ci-mingw-subset-1
               CUSTOM_MINGW: 1
-              # FIXME(#59637)
-              NO_DEBUG_ASSERTIONS: 1
-              NO_LLVM_ASSERTIONS: 1
             <<: *job-windows-xl
 
           - name: i686-mingw-2
@@ -583,9 +568,6 @@ jobs:
               SCRIPT: make ci-mingw-subset-1
               RUST_CONFIGURE_ARGS: --build=x86_64-pc-windows-gnu --enable-profiler
               CUSTOM_MINGW: 1
-              # FIXME(#59637)
-              NO_DEBUG_ASSERTIONS: 1
-              NO_LLVM_ASSERTIONS: 1
             <<: *job-windows-xl
 
           - name: x86_64-mingw-2