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-rw-r--r--compiler/image_writer.h4
1 files changed, 3 insertions, 1 deletions
diff --git a/compiler/image_writer.h b/compiler/image_writer.h
index c20d83639a..8e930f0373 100644
--- a/compiler/image_writer.h
+++ b/compiler/image_writer.h
@@ -457,7 +457,9 @@ class ImageWriter FINAL {
// Prune class memoization table to speed up ContainsBootClassLoaderNonImageClass.
std::unordered_map<mirror::Class*, bool> prune_class_memo_;
- // Class loaders with a class table to write out. Should only be one currently.
+ // Class loaders with a class table to write out. There should only be one class loader because
+ // dex2oat loads the dex files to be compiled into a single class loader. For the boot image,
+ // null is a valid entry.
std::unordered_set<mirror::ClassLoader*> class_loaders_;
// Number of image class table bytes.