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-rw-r--r--java/dexpreopt_bootjars.go4
1 files changed, 3 insertions, 1 deletions
diff --git a/java/dexpreopt_bootjars.go b/java/dexpreopt_bootjars.go
index 19c65cac7..0ba56caa5 100644
--- a/java/dexpreopt_bootjars.go
+++ b/java/dexpreopt_bootjars.go
@@ -159,7 +159,9 @@ import (
// library is a part of a non-updatable APEX).
//
// A related variable PRODUCT_UPDATABLE_BOOT_JARS contains bootclasspath libraries that are in
-// updatable APEXes. They are not included in the boot image.
+// APEXes. They are not included in the boot image. The only exception here is core-icu4j.jar that
+// has been historically part of the boot image and is now in a non updatable apex; it is treated
+// as being part of PRODUCT_BOOT_JARS and is in the boot image.
//
// One exception to the above rules are "coverage" builds (a special build flavor which requires
// setting environment variable EMMA_INSTRUMENT_FRAMEWORK=true). In coverage builds the Java code in