Avoid hangs due to upstream#93672

tests/Sanity/suite_libstdcplusplus/runtest.sh

@@ -72,6 +72,14 @@ rlJournalStart
             rlRun "print_dts_exp >$SRCROOT/libstdc++-v3/testsuite/lib/dts.exp"
             rlAssertGrep 'return [0-9]' "$SRCROOT/libstdc++-v3/testsuite/lib/dts.exp"
         fi
+
+        # Exclude known problematic tests
+
+        # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93672
+        # Note: Can not only fail but *hang* the whole testsuite
+        if rlTestVersion "$(rpm -q --qf='%{VERSION}' libstdc++)" '<' '9.5.0'; then
+            rlRun "rm -f $SRCROOT/libstdc++-v3/testsuite/27_io/basic_istream/ignore/{char,wchar_t}/93672.cc"
+        fi
     rlPhaseEnd
 
     rlPhaseStartTest