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-rw-r--r--jack/src/com/android/jack/incremental/IncrementalLogWriter.java2
1 files changed, 1 insertions, 1 deletions
diff --git a/jack/src/com/android/jack/incremental/IncrementalLogWriter.java b/jack/src/com/android/jack/incremental/IncrementalLogWriter.java
index 696b348..7535223 100644
--- a/jack/src/com/android/jack/incremental/IncrementalLogWriter.java
+++ b/jack/src/com/android/jack/incremental/IncrementalLogWriter.java
@@ -89,7 +89,7 @@ class IncrementalLogWriter {
void writeStrings(@Nonnull String prefixStr, @Nonnull Collection<String> strings) {
ps.print(prefixStr);
ps.print(": ");
- ps.print(Joiner.on(",").join(strings));
+ ps.print(Joiner.on(",").useForNull("").join(strings));
ps.println();
}