qemurunner: Use backslashreplace with utf8 to make invalid characters clear

Switch to the backslashreplace error handling when decoding strings so that
invalid characters are clear in the stream to improve debugging.

(From OE-Core rev: 8ec86d46f736ec3e625b741e97545377c79414ee)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/meta/lib/oeqa/utils/qemurunner.py b/meta/lib/oeqa/utils/qemurunner.py
index b8f5111286..b738a261d8 100644
--- a/meta/lib/oeqa/utils/qemurunner.py
+++ b/meta/lib/oeqa/utils/qemurunner.py
@@ -109,7 +109,7 @@ class QemuRunner:
 
     def decode_qemulog(self, todecode):
         # Sanitize the data received from qemu as it may contain control characters
-        msg = todecode.decode("utf-8", errors='ignore')
+        msg = todecode.decode("utf-8", errors='backslashreplace')
         msg = re_control_char.sub('', msg)
         return msg
 
@@ -473,7 +473,7 @@ class QemuRunner:
                         self.logger.error('Invalid file type: %s\n%s' % (file))
                         read = b''
 
-                    self.logger.debug2('Partial boot log:\n%s' % (read.decode('utf-8', errors='ignore')))
+                    self.logger.debug2('Partial boot log:\n%s' % (read.decode('utf-8', errors='backslashreplace')))
                     data = data + read
                     if data:
                         bootlog += data