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-rw-r--r--tools/patman/cros_subprocess.py6
1 files changed, 3 insertions, 3 deletions
diff --git a/tools/patman/cros_subprocess.py b/tools/patman/cros_subprocess.py
index efd0a5aaf7..fdd5138685 100644
--- a/tools/patman/cros_subprocess.py
+++ b/tools/patman/cros_subprocess.py
@@ -169,11 +169,11 @@ class Popen(subprocess.Popen):
self.stdin.close()
if self.stdout:
read_set.append(self.stdout)
- stdout = b''
+ stdout = bytearray()
if self.stderr and self.stderr != self.stdout:
read_set.append(self.stderr)
- stderr = b''
- combined = b''
+ stderr = bytearray()
+ combined = bytearray()
input_offset = 0
while read_set or write_set: