Restore the Qt 5.10 (QTBUG-66585) exclusion

.github/workflows/build.yaml

@@ -160,8 +160,8 @@ jobs:
         - { cc: gcc-14, cxx: g++-14, coverage: false }
         #- { cc: gcc-14, cxx: g++-14, coverage: true }
         exclude:
-          #- { qt: '5.10.1', env: { cc: gcc-14 } } # Compiler warnings (treated as errors) in generated moc code.
-          # GitHub's macOS 14+ gcc can only target arm64, but the Qt Online Installer only provides ARM64 from 6.2+
+          # GitHub's macOS 14+ gcc can only target arm64, but the Qt Online Installer only provides ARM64 from 6.2+,
+          # so exclude Qt 5.x (and 6.1, 6.2) with GCC on macOS 14+. Also see the `arch` step below for more details.
           - { qt: '5.9.9',   os: macos-14, env: { cc: gcc-14 } }
           - { qt: '5.9.9',   os: macos-15, env: { cc: gcc-14 } }
           - { qt: '5.10.1',  os: macos-14, env: { cc: gcc-14 } }
@@ -176,10 +176,10 @@ jobs:
           - { qt: '5.14.2',  os: macos-15, env: { cc: gcc-14 } }
           - { qt: '5.15.2',  os: macos-14, env: { cc: gcc-14 } }
           - { qt: '5.15.2',  os: macos-15, env: { cc: gcc-14 } }
+          # Exclude Qt 5.10 with GCC on macOS. See https://bugreports.qt.io/browse/QTBUG-66585
+          - { qt: '5.10.1', env: { cc: gcc-14 } }
           # Exclude Qt 6.2 on macOS 14+ (Qt6 only officially supports macOS 14 from Qt 6.4+, and some 6.2.n LTS update).
           #- { qt: '6.2.4',   os: 'macos-14' }
-          # Exclude Qt 5.10 with GCC on macOS. See https://bugreports.qt.io/browse/QTBUG-66585
-          - { qt: '5.10.1', env: { cc: gcc-12 } }
           # Exclude Qt6 with GCC on macOS for now, as GCC (only) has lots of false compiler
           # errors, that even if worked-around result in SIGBUS errors in unit tests. See
           # https://bugreports.qt.io/browse/QTBUG-107050 (non-exhaustive).