We are currently solving the following issue within our repository. Here is the issue text:
--- BEGIN ISSUE ---
VERIFY-BOOT-ERROR-WARNINGS.py: fix test case
Test case is not running properly on redhat. Run the script directly, not through lisav2 to observe this better.

Release: 7.7 Snapshot 5 (most likely 7.6 should also have this behavior)

Issues to be fixed:
- ignore if syslog is not present (that exists only on ubuntu/debian).
[root@rhel77gen2 Linux]# python VERIFY-BOOT-ERROR-WARNINGS.py
2.7.5 (default, Jun 11 2019, 14:33:56)
[GCC 4.8.5 20150623 (Red Hat 4.8.5-39)]
grep: /var/log/syslog: No such file or directory

- fix grep search
[root@rhel77gen2 Linux]#  grep -nw '/var/log/messages' -e 'mlx5'
[root@rhel77gen2 Linux]# grep /var/log/messages -e mlx5
Jul 29 10:02:27 rhel77gen2 kernel: mlx5_core ae35:00:02.0: firmware version: 14.23.1020


--- END ISSUE ---

Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
--- BEGIN FILES ---
Path: `Testscripts/Linux/VERIFY-BOOT-ERROR-WARNINGS.py`
Content:
```
1 #!/usr/bin/python
2 # Copyright (c) Microsoft Corporation. All rights reserved.
3 # Licensed under the Apache License.
4 from azuremodules import *
5 
6 white_list_xml = "ignorable-boot-errors.xml"
7 
8 
9 def RunTest():
10     UpdateState("TestRunning")
11     RunLog.info("Checking for ERROR and WARNING messages in system logs.")
12     errors = Run("grep -nw '/var/log/syslog' -e 'error' --ignore-case && grep -nw '/var/log/messages' -e 'error' --ignore-case")
13     warnings = Run("grep -nw '/var/log/syslog' -e 'warning' --ignore-case && grep -nw '/var/log/messages' -e 'warning' --ignore-case")
14     failures = Run("grep -nw '/var/log/syslog' -e 'fail' --ignore-case && grep -nw '/var/log/messages' -e 'fail' --ignore-case")
15     if (not errors and not warnings and not failures):
16         RunLog.info('Could not find ERROR/WARNING/FAILURE messages in syslog/messages log file.')
17         ResultLog.info('PASS')
18     else:
19         if white_list_xml and os.path.isfile(white_list_xml):
20             try:
21                 import xml.etree.cElementTree as ET
22             except ImportError:
23                 import xml.etree.ElementTree as ET
24 
25             white_list_file = ET.parse(white_list_xml)
26             xml_root = white_list_file.getroot()
27 
28             RunLog.info('Checking ignorable boot ERROR/WARNING/FAILURE messages...')
29             for node in xml_root:
30                 if (failures and node.tag == "failures"):
31                     failures = RemoveIgnorableMessages(failures, node)
32                 if (errors and node.tag == "errors"):
33                     errors = RemoveIgnorableMessages(errors, node)
34                 if (warnings and node.tag == "warnings"):
35                     warnings = RemoveIgnorableMessages(warnings, node)
36 
37         if (errors or warnings or failures):
38             RunLog.error('Found ERROR/WARNING/FAILURE messages in logs.')
39             if(errors):
40                 SplitLog('Errors', errors)
41             if(warnings):
42                 SplitLog('warnings', warnings)
43             if(failures):
44                 SplitLog('failures', failures)
45             ResultLog.error('FAIL')
46         else:
47             ResultLog.info('PASS')
48     UpdateState("TestCompleted")
49 
50 
51 def SplitLog(logType, logValues):
52     for logEntry in logValues:
53         RunLog.info(logType + ': ' + logEntry)
54 
55 
56 def RemoveIgnorableMessages(messages, keywords_xml_node):
57     message_list = messages.strip().split('\n')
58     valid_list = []
59     for msg in message_list:
60         for keywords in keywords_xml_node:
61             if keywords.text in msg:
62                 RunLog.info('Ignorable ERROR/WARNING/FAILURE message: ' + msg)
63                 break
64         else:
65             valid_list.append(msg)
66     if len(valid_list) > 0:
67         return valid_list
68     else:
69         return None
70 
71 RunTest()
72
```
--- END FILES ---

Please first localize the bug based on the issue statement, and then generate a patch according to the `git diff` format fenced by three backticks.

Here is an example:

```diff
diff --git a/examples/server_async.py b/examples/server_async.py
--- a/examples/server_async.py
+++ b/examples/server_async.py
@@ -313,4 +313,4 @@
 
 
 if __name__ == "__main__":
-    asyncio.run(run_async_server("."), debug=True)
+    asyncio.run(run_async_server(), debug=True)
diff --git a/examples/server_sync.py b/examples/server_sync.py
--- a/examples/server_sync.py
+++ b/examples/server_sync.py
@@ -313,5 +313,5 @@
 
 
 if __name__ == "__main__":
-    server = run_sync_server(".")
+    server = run_sync_server()
     server.shutdown()

```

diff --git a/Testscripts/Linux/VERIFY-BOOT-ERROR-WARNINGS.py b/Testscripts/Linux/VERIFY-BOOT-ERROR-WARNINGS.py
--- a/Testscripts/Linux/VERIFY-BOOT-ERROR-WARNINGS.py
+++ b/Testscripts/Linux/VERIFY-BOOT-ERROR-WARNINGS.py
@@ -9,9 +9,9 @@
 def RunTest():
     UpdateState("TestRunning")
     RunLog.info("Checking for ERROR and WARNING messages in system logs.")
-    errors = Run("grep -nw '/var/log/syslog' -e 'error' --ignore-case && grep -nw '/var/log/messages' -e 'error' --ignore-case")
-    warnings = Run("grep -nw '/var/log/syslog' -e 'warning' --ignore-case && grep -nw '/var/log/messages' -e 'warning' --ignore-case")
-    failures = Run("grep -nw '/var/log/syslog' -e 'fail' --ignore-case && grep -nw '/var/log/messages' -e 'fail' --ignore-case")
+    errors = Run("grep -nw '/var/log/syslog' -e 'error' --ignore-case --no-message && grep /var/log/messages -e error --ignore-case --no-message")
+    warnings = Run("grep -nw '/var/log/syslog' -e 'warning' --ignore-case --no-message && grep /var/log/messages -e warning --ignore-case --no-message")
+    failures = Run("grep -nw '/var/log/syslog' -e 'fail' --ignore-case --no-message && grep /var/log/messages -e fail --ignore-case --no-message")
     if (not errors and not warnings and not failures):
         RunLog.info('Could not find ERROR/WARNING/FAILURE messages in syslog/messages log file.')
         ResultLog.info('PASS')

{"golden_diff": "diff --git a/Testscripts/Linux/VERIFY-BOOT-ERROR-WARNINGS.py b/Testscripts/Linux/VERIFY-BOOT-ERROR-WARNINGS.py\n--- a/Testscripts/Linux/VERIFY-BOOT-ERROR-WARNINGS.py\n+++ b/Testscripts/Linux/VERIFY-BOOT-ERROR-WARNINGS.py\n@@ -9,9 +9,9 @@\n def RunTest():\n     UpdateState(\"TestRunning\")\n     RunLog.info(\"Checking for ERROR and WARNING messages in system logs.\")\n-    errors = Run(\"grep -nw '/var/log/syslog' -e 'error' --ignore-case && grep -nw '/var/log/messages' -e 'error' --ignore-case\")\n-    warnings = Run(\"grep -nw '/var/log/syslog' -e 'warning' --ignore-case && grep -nw '/var/log/messages' -e 'warning' --ignore-case\")\n-    failures = Run(\"grep -nw '/var/log/syslog' -e 'fail' --ignore-case && grep -nw '/var/log/messages' -e 'fail' --ignore-case\")\n+    errors = Run(\"grep -nw '/var/log/syslog' -e 'error' --ignore-case --no-message && grep /var/log/messages -e error --ignore-case --no-message\")\n+    warnings = Run(\"grep -nw '/var/log/syslog' -e 'warning' --ignore-case --no-message && grep /var/log/messages -e warning --ignore-case --no-message\")\n+    failures = Run(\"grep -nw '/var/log/syslog' -e 'fail' --ignore-case --no-message && grep /var/log/messages -e fail --ignore-case --no-message\")\n     if (not errors and not warnings and not failures):\n         RunLog.info('Could not find ERROR/WARNING/FAILURE messages in syslog/messages log file.')\n         ResultLog.info('PASS')\n", "issue": "VERIFY-BOOT-ERROR-WARNINGS.py: fix test case\nTest case is not running properly on redhat. Run the script directly, not through lisav2 to observe this better.\r\n\r\nRelease: 7.7 Snapshot 5 (most likely 7.6 should also have this behavior)\r\n\r\nIssues to be fixed:\r\n- ignore if syslog is not present (that exists only on ubuntu/debian).\r\n[root@rhel77gen2 Linux]# python VERIFY-BOOT-ERROR-WARNINGS.py\r\n2.7.5 (default, Jun 11 2019, 14:33:56)\r\n[GCC 4.8.5 20150623 (Red Hat 4.8.5-39)]\r\ngrep: /var/log/syslog: No such file or directory\r\n\r\n- fix grep search\r\n[root@rhel77gen2 Linux]#  grep -nw '/var/log/messages' -e 'mlx5'\r\n[root@rhel77gen2 Linux]# grep /var/log/messages -e mlx5\r\nJul 29 10:02:27 rhel77gen2 kernel: mlx5_core ae35:00:02.0: firmware version: 14.23.1020\r\n\n", "before_files": [{"content": "#!/usr/bin/python\n# Copyright (c) Microsoft Corporation. All rights reserved.\n# Licensed under the Apache License.\nfrom azuremodules import *\n\nwhite_list_xml = \"ignorable-boot-errors.xml\"\n\n\ndef RunTest():\n    UpdateState(\"TestRunning\")\n    RunLog.info(\"Checking for ERROR and WARNING messages in system logs.\")\n    errors = Run(\"grep -nw '/var/log/syslog' -e 'error' --ignore-case && grep -nw '/var/log/messages' -e 'error' --ignore-case\")\n    warnings = Run(\"grep -nw '/var/log/syslog' -e 'warning' --ignore-case && grep -nw '/var/log/messages' -e 'warning' --ignore-case\")\n    failures = Run(\"grep -nw '/var/log/syslog' -e 'fail' --ignore-case && grep -nw '/var/log/messages' -e 'fail' --ignore-case\")\n    if (not errors and not warnings and not failures):\n        RunLog.info('Could not find ERROR/WARNING/FAILURE messages in syslog/messages log file.')\n        ResultLog.info('PASS')\n    else:\n        if white_list_xml and os.path.isfile(white_list_xml):\n            try:\n                import xml.etree.cElementTree as ET\n            except ImportError:\n                import xml.etree.ElementTree as ET\n\n            white_list_file = ET.parse(white_list_xml)\n            xml_root = white_list_file.getroot()\n\n            RunLog.info('Checking ignorable boot ERROR/WARNING/FAILURE messages...')\n            for node in xml_root:\n                if (failures and node.tag == \"failures\"):\n                    failures = RemoveIgnorableMessages(failures, node)\n                if (errors and node.tag == \"errors\"):\n                    errors = RemoveIgnorableMessages(errors, node)\n                if (warnings and node.tag == \"warnings\"):\n                    warnings = RemoveIgnorableMessages(warnings, node)\n\n        if (errors or warnings or failures):\n            RunLog.error('Found ERROR/WARNING/FAILURE messages in logs.')\n            if(errors):\n                SplitLog('Errors', errors)\n            if(warnings):\n                SplitLog('warnings', warnings)\n            if(failures):\n                SplitLog('failures', failures)\n            ResultLog.error('FAIL')\n        else:\n            ResultLog.info('PASS')\n    UpdateState(\"TestCompleted\")\n\n\ndef SplitLog(logType, logValues):\n    for logEntry in logValues:\n        RunLog.info(logType + ': ' + logEntry)\n\n\ndef RemoveIgnorableMessages(messages, keywords_xml_node):\n    message_list = messages.strip().split('\\n')\n    valid_list = []\n    for msg in message_list:\n        for keywords in keywords_xml_node:\n            if keywords.text in msg:\n                RunLog.info('Ignorable ERROR/WARNING/FAILURE message: ' + msg)\n                break\n        else:\n            valid_list.append(msg)\n    if len(valid_list) > 0:\n        return valid_list\n    else:\n        return None\n\nRunTest()\n", "path": "Testscripts/Linux/VERIFY-BOOT-ERROR-WARNINGS.py"}], "after_files": [{"content": "#!/usr/bin/python\n# Copyright (c) Microsoft Corporation. All rights reserved.\n# Licensed under the Apache License.\nfrom azuremodules import *\n\nwhite_list_xml = \"ignorable-boot-errors.xml\"\n\n\ndef RunTest():\n    UpdateState(\"TestRunning\")\n    RunLog.info(\"Checking for ERROR and WARNING messages in system logs.\")\n    errors = Run(\"grep -nw '/var/log/syslog' -e 'error' --ignore-case --no-message && grep /var/log/messages -e error --ignore-case --no-message\")\n    warnings = Run(\"grep -nw '/var/log/syslog' -e 'warning' --ignore-case --no-message && grep /var/log/messages -e warning --ignore-case --no-message\")\n    failures = Run(\"grep -nw '/var/log/syslog' -e 'fail' --ignore-case --no-message && grep /var/log/messages -e fail --ignore-case --no-message\")\n    if (not errors and not warnings and not failures):\n        RunLog.info('Could not find ERROR/WARNING/FAILURE messages in syslog/messages log file.')\n        ResultLog.info('PASS')\n    else:\n        if white_list_xml and os.path.isfile(white_list_xml):\n            try:\n                import xml.etree.cElementTree as ET\n            except ImportError:\n                import xml.etree.ElementTree as ET\n\n            white_list_file = ET.parse(white_list_xml)\n            xml_root = white_list_file.getroot()\n\n            RunLog.info('Checking ignorable boot ERROR/WARNING/FAILURE messages...')\n            for node in xml_root:\n                if (failures and node.tag == \"failures\"):\n                    failures = RemoveIgnorableMessages(failures, node)\n                if (errors and node.tag == \"errors\"):\n                    errors = RemoveIgnorableMessages(errors, node)\n                if (warnings and node.tag == \"warnings\"):\n                    warnings = RemoveIgnorableMessages(warnings, node)\n\n        if (errors or warnings or failures):\n            RunLog.error('Found ERROR/WARNING/FAILURE messages in logs.')\n            if(errors):\n                SplitLog('Errors', errors)\n            if(warnings):\n                SplitLog('warnings', warnings)\n            if(failures):\n                SplitLog('failures', failures)\n            ResultLog.error('FAIL')\n        else:\n            ResultLog.info('PASS')\n    UpdateState(\"TestCompleted\")\n\n\ndef SplitLog(logType, logValues):\n    for logEntry in logValues:\n        RunLog.info(logType + ': ' + logEntry)\n\n\ndef RemoveIgnorableMessages(messages, keywords_xml_node):\n    message_list = messages.strip().split('\\n')\n    valid_list = []\n    for msg in message_list:\n        for keywords in keywords_xml_node:\n            if keywords.text in msg:\n                RunLog.info('Ignorable ERROR/WARNING/FAILURE message: ' + msg)\n                break\n        else:\n            valid_list.append(msg)\n    if len(valid_list) > 0:\n        return valid_list\n    else:\n        return None\n\nRunTest()\n", "path": "Testscripts/Linux/VERIFY-BOOT-ERROR-WARNINGS.py"}]}