disable mingw(clang32) github tests in build.yaml

.github/workflows/build.yaml

@@ -298,8 +298,18 @@ jobs:
       # Allow other runners in the matrix to continue if some fail
       fail-fast: false
 
+      # CLANG32 is broken, as of Mar 21, 2024.  The stable branch CI also fails
+      # the same way, even though it succeeded on Mar 2, with the same
+      # SuiteSparse 7.6.1 and same workflow file.  Between that time, clang and
+      # openmp were upgraded. clang-openmp went from 17.0.6-1 to 18.1.1-1, and
+      # clang itself went from 17.0.6-7 to 18.1.1-3.  Nothing else changed, so
+      # it must be a problem with the github runner (changed from 2.313.0 to
+      # 2.314.1).  So for now, CLANG32 is excluded from this CI test.
+
       matrix:
-        msystem: [MINGW64, MINGW32, CLANG64, CLANG32]
+#       CLANG32 disabled for now:
+#       msystem: [MINGW64, MINGW32, CLANG64, CLANG32]
+        msystem: [MINGW64, MINGW32, CLANG64]
         include:
           - msystem: MINGW64
             target-prefix: mingw-w64-x86_64
@@ -310,10 +320,11 @@ jobs:
           - msystem: CLANG64
             target-prefix: mingw-w64-clang-x86_64
             f77-package: mingw-w64-clang-x86_64-fc
-          - msystem: CLANG32
-            target-prefix: mingw-w64-clang-i686
-            # There's no Fortran compiler for this environment.
-            f77-package: mingw-w64-clang-i686-cc
+#           CLANG32 disabled for now:
+#         - msystem: CLANG32
+#           target-prefix: mingw-w64-clang-i686
+#           # There's no Fortran compiler for this environment.
+#           f77-package: mingw-w64-clang-i686-cc
 
     env:
       CHERE_INVOKING: 1