naive version which fails TEST LastLevelCompaction

db/db_impl.cc

@@ -606,6 +606,10 @@ void DBImpl::TEST_CompactRange(int level, const Slice* begin,
 
   InternalKey begin_storage, end_storage;
 
+  if (level == config::kNumLevels - 1) {
+    return;
+  }
+
   ManualCompaction manual;
   manual.level = level;
   manual.done = false;

db/dbformat.h

@@ -22,7 +22,7 @@ namespace leveldb {
 // Grouping of constants.  We may want to make some of these
 // parameters set via options.
 namespace config {
-static const int kNumLevels = 7;
+static const int kNumLevels = 3;
 
 // Level-0 compaction is started when we hit this many files.
 static const int kL0_CompactionTrigger = 4;

db/version_set.cc

@@ -1104,13 +1104,11 @@ int VersionSet::NumLevelFiles(int level) const {
 
 const char* VersionSet::LevelSummary(LevelSummaryStorage* scratch) const {
   // Update code if kNumLevels changes
-  static_assert(config::kNumLevels == 7, "");
+  static_assert(config::kNumLevels == 3, "");
   std::snprintf(
-      scratch->buffer, sizeof(scratch->buffer), "files[ %d %d %d %d %d %d %d ]",
+      scratch->buffer, sizeof(scratch->buffer), "files[ %d %d %d ]",
       int(current_->files_[0].size()), int(current_->files_[1].size()),
-      int(current_->files_[2].size()), int(current_->files_[3].size()),
-      int(current_->files_[4].size()), int(current_->files_[5].size()),
-      int(current_->files_[6].size()));
+      int(current_->files_[2].size()));
   return scratch->buffer;
 }