CI: Run Qt AT-SPI2 bridge tests on All_Debug runner, not ASan runners

For running the Qt AT-SPI2 bridge tests under CI:

1. We need to actually launch a Qt-UI Ladybird process, and assert on
   the output from the Qt AT-SPI2 bridge.
2. Qt's AT-SPI2 bridge only activates with a real platform plugin
   (offscreen doesn’t qualify).
3. On a headless Linux runner in our CI, the only viable Qt platform
   plugin is xcb.
4. Qt's xcb plugin pulls libxkbcommon-x11 in as a transitive runtime
   dependency.

But, under ASan, the QXcbConnection startup path triggers a buffer
overflow in libxkbcommon-x11. Therefore, we skip these tests under
ASan — and for CI, we run them on the All_Debug runner instead.

Author: sideshowbarker

.github/workflows/lagom-template.yml

@@ -217,6 +217,15 @@ jobs:
         env:
           TESTS_ONLY: 1
 
+      # The AT-SPI2 tests can't be run successfully under a Sanitizer build. ASan-instrumented Qt-on-XCB hits a buffer
+      # overflow in libxkbcommon-x11. So, run them under the Debug build instead.
+      - name: Test - LibWeb AT-SPI2 bridge (All_Debug)
+        if: ${{ inputs.os_name == 'Linux' && inputs.build_preset == 'All_Debug' }}
+        working-directory: ${{ github.workspace }}
+        run: ctest --output-on-failure --test-dir Build -R LibWebAccessibilityBridge --timeout 1800
+        env:
+          TESTS_ONLY: 1
+
       - name: Upload LibWeb Test Artifacts
         if: ${{ always() && inputs.build_preset != 'Fuzzers' && inputs.build_preset != 'All_Debug' }}
         uses: actions/upload-artifact@v7

Tests/LibWeb/AccessibilityBridge/CMakeLists.txt

@@ -11,6 +11,17 @@ if (NOT LADYBIRD_GUI_FRAMEWORK STREQUAL "Qt")
     return()
 endif()
 
+if (ENABLE_ADDRESS_SANITIZER)
+    # For running these tests under CI:
+    # 1. We need to actually launch a Qt-UI Ladybird process, and assert on the output from the Qt AT-SPI2 bridge.
+    # 2. Qt's AT-SPI2 bridge only activates with a real platform plugin (offscreen doesn’t qualify).
+    # 3. On a headless Linux runner in our CI, the only viable Qt platform plugin is xcb.
+    # 4. Qt's xcb plugin pulls libxkbcommon-x11 in as a transitive runtime dependency.
+    # But, under ASan, the QXcbConnection startup path triggers a buffer overflow in libxkbcommon-x11. Therefore, we
+    # skip these tests under ASan — and for CI, we run them on the All_Debug runner instead.
+    return()
+endif()
+
 find_package(Python3 REQUIRED)
 
 # run_tests.sh reads LADYBIRD_BINARY to locate the Ladybird executable. Point it at the ladybird target — so tests don't