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-rw-r--r--updater/blockimg.cpp5
1 files changed, 4 insertions, 1 deletions
diff --git a/updater/blockimg.cpp b/updater/blockimg.cpp
index 47849a155..c4c09098e 100644
--- a/updater/blockimg.cpp
+++ b/updater/blockimg.cpp
@@ -1399,7 +1399,10 @@ static int PerformCommandDiff(CommandParameters& params) {
// We expect the output of the patcher to fill the tgt ranges exactly.
if (!writer.Finished()) {
- LOG(ERROR) << "range sink underrun?";
+ LOG(ERROR) << "Failed to fully write target blocks (range sink underrun): Missing "
+ << writer.AvailableSpace() << " bytes";
+ failure_type = kPatchApplicationFailure;
+ return -1;
}
} else {
LOG(INFO) << "skipping " << blocks << " blocks already patched to " << tgt.blocks() << " ["