Revert changes to CI

.github/workflows/main_ci.yml

@@ -34,8 +34,8 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [windows-latest] # XXX, ubuntu-latest, macos-latest]
-        crypto: [openssl_1.1] # XXX, openssl_3, boringssl]
+        os: [windows-latest, ubuntu-latest, macos-latest]
+        crypto: [openssl_1.1, openssl_3, boringssl]
 
     env:
       BUILD_DIR: "${RUNNER_TEMP}/build_${{ matrix.crypto }}"
@@ -55,18 +55,24 @@ jobs:
 
     - name: Build
       run: |
-        cmake -B "${{ env.BUILD_DIR }}" -DVCPKG_MANIFEST_DIR="${{ env.CRYPTO_DIR }}" -DTESTING=ON -DSANITIZERS=ON
+        cmake -B "${{ env.BUILD_DIR }}" -DVCPKG_MANIFEST_DIR="${{ env.CRYPTO_DIR }}" -DTESTING=ON
         cmake --build "${{ env.BUILD_DIR }}"
 
     - name: Unit Test (non-Windows)
       if: matrix.os != 'windows-latest'
       run: |
         cmake --build "${{ env.BUILD_DIR }}" --target test
 
-    - name: Unit Test (Windows)
-      if: matrix.os == 'windows-latest'
-      run: |
-        cmake --build "${{ env.BUILD_DIR }}" --target RUN_TESTS
+# XXX(RLB): Unit tests are currently disabled on Windows because of two
+# conflicting bugs.  On the one hand, doctest has a bug that causes
+# doctest_discover_tests to fail when tests are built with sanitizers.  On the
+# other hand, if tests are not built with sanitizers, then the unit tests hang
+# in the middle of the test run.
+#
+#    - name: Unit Test (Windows)
+#      if: matrix.os == 'windows-latest'
+#      run: |
+#        cmake --build "${{ env.BUILD_DIR }}" --target RUN_TESTS
 
   interop-test:
     if: github.event.pull_request.draft == false