fixed #14620 - add suppression for valgrind false positive

Author: firewave

.github/workflows/valgrind.yml

@@ -51,7 +51,7 @@ jobs:
       - name: Run valgrind
         run: |
           ec=0
-          valgrind --error-limit=yes --leak-check=full --num-callers=50 --show-reachable=yes --track-origins=yes --suppressions=valgrind/testrunner.supp --gen-suppressions=all --log-fd=9 --error-exitcode=42 ./testrunner TestGarbage TestOther TestSimplifyTemplate TestRegEx 9>memcheck.log || ec=1
+          valgrind --error-limit=yes --leak-check=full --num-callers=50 --show-reachable=yes --track-origins=yes --suppressions=valgrind/testrunner.supp --gen-suppressions=all -s --log-fd=9 --error-exitcode=42 ./testrunner TestGarbage TestOther TestSimplifyTemplate TestRegEx 9>memcheck.log || ec=1
           cat memcheck.log
           exit $ec
         # TODO: debuginfod.ubuntu.com is currently not responding to any requests causing it to run into a 40(!) minute timeout

valgrind/testrunner.supp

@@ -14,3 +14,9 @@
    obj:*
    obj:*
 }
+{
+   TestRegEx::partialmatch false positive
+   Memcheck:Cond
+   obj:*
+   obj:*
+}