Add basic debug printing

FacadeFuzz.cpp

@@ -39,6 +39,9 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
     switch (gArbitrary.bounded(3)) {
     case 0: {
 // Add mutations
+#if DEBUG
+      printf("Add mutations\n");
+#endif
 
       const int numKeys = gArbitrary.bounded(10);
       std::set<weaselab::VersionedMap::Key, KeyComp> keySet;
@@ -81,6 +84,9 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
     } break;
     case 1: {
 // Set oldest version
+#if DEBUG
+      printf("Set oldest version\n");
+#endif
 
       const int64_t newOldestVersion =
           facade.getOldestVersion() +
@@ -93,6 +99,10 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
     case 2: {
       // Check range read
 
+#if DEBUG
+      printf("Check range read\n");
+#endif
+
       const int64_t version = facade.getOldestVersion() +
                               gArbitrary.bounded(facade.getVersion() -
                                                  facade.getOldestVersion() + 1);