8268897: [TESTBUG] compiler/compilercontrol/mixed/RandomCommandsTest.java must not fail on Command.quiet

Reviewed-by: kvn

Author: Nils Eliasson

test/hotspot/jtreg/compiler/compilercontrol/share/MultiCommand.java

@@ -72,7 +72,9 @@ public static AbstractTestBase generateRandomTest(boolean validOnly) {
 
             Executable exec = Utils.getRandomElement(METHODS).first;
             MethodDescriptor md;
-            if (validOnly) {
+
+            // Command.quiet discards the method descriptor - can never fail on the method descriptor
+            if (validOnly || cmd == Command.QUIET) {
                 md = AbstractTestBase.getValidMethodDescriptor(exec);
             } else {
                 md = AbstractTestBase.METHOD_GEN.generateRandomDescriptor(exec);