We are currently solving the following issue within our repository. Here is the issue text:
--- BEGIN ISSUE ---
The modprobe combiner is raising AttributeError exceptions in production.
The AllModProbe combiner is throwing a number of the exception AttributeError("'bool' object has no attribute 'append'",) in production.

--- END ISSUE ---

Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
--- BEGIN FILES ---
Path: `insights/combiners/modprobe.py`
Content:
```
1 """
2 Modprobe configuration
3 ======================
4 
5 The modprobe configuration files are normally available to rules as a list of
6 ModProbe objects.  This combiner turns those into one set of data, preserving
7 the original file name that defined modprobe configuration line using a tuple.
8 
9 """
10 
11 from insights.core.plugins import combiner
12 from insights.parsers.modprobe import ModProbe
13 from .. import LegacyItemAccess
14 
15 from collections import namedtuple
16 
17 
18 ModProbeValue = namedtuple("ModProbeValue", ['value', 'source'])
19 """
20 A value from a ModProbe source
21 """
22 
23 
24 @combiner(ModProbe)
25 class AllModProbe(LegacyItemAccess):
26     """
27     Combiner for accessing all the modprobe configuration files in one
28     structure.
29 
30     It's important for our reporting and information purposes to know not
31     only what the configuration was but where it was defined.  Therefore, the
32     format of the data in this combiner is slightly different compared to the
33     ModProbe parser.  Here, each 'value' is actually a 2-tuple, with the
34     actual data first and the file name from whence the value came second.
35     This does mean that you need to pull the value out of each item - e.g.
36     using a list comprehension - but it means that every item is associated
37     with the file it was defined in.
38 
39     In line with the ModProbe configuration parser, the actual value is
40     usually a list of the space-separated parts on the line, and the
41     definitions for each module are similarly kept in a list, which makes
42 
43     Thanks to the LegacyItemAccess class, this can also be treated as a
44     dictionary for look-ups of data in the `data` attribute.
45 
46     Attributes:
47         data (dict): The combined data structures, with each item as a
48             2-tuple, as described above.
49         bad_lines(list): The list of unparseable lines from all files, with
50             each line as a 2-tuple as described above.
51 
52     Sample data files::
53 
54         /etc/modprobe.conf:
55             # watchdog drivers
56             blacklist i8xx_tco
57 
58             # Don't install the Firewire ethernet driver
59             install eth1394 /bin/true
60 
61         /etc/modprobe.conf.d/no_ipv6.conf:
62             options ipv6 disable=1
63             install ipv6 /bin/true
64 
65     Examples:
66         >>> all_modprobe = shared[AllModProbe]
67         >>> all_modprobe['alias']
68         []
69         >>> all_modprobe['blacklist']
70         {'i8xx_tco': ModProbeValue(True, '/etc/modprobe.conf')}
71         >>> all_modprobe['install']
72         {'eth1394': ModProbeValue(['/bin/true'], '/etc/modprobe.conf'),
73          'ipv6': ModProbeValue(['/bin/true'], '/etc/modprobe.conf.d/no_ipv6.conf')}
74     """
75     def __init__(self, modprobe):
76         self.data = {}
77         self.bad_lines = []
78         for mod in modprobe:
79             filename = mod.file_path  # relative path inside archive
80             # Copy data section
81             for section, sectdict in mod.data.items():
82                 if section not in self.data:
83                     self.data[section] = {}
84                 for name, value in sectdict.items():
85                     if name in self.data[section]:
86                         # append to this module's value - should only
87                         # happen for aliases.
88                         self.data[section][name][0].append(value)
89                     else:
90                         # create new tuple
91                         self.data[section][name] = ModProbeValue(value=value, source=filename)
92             # Copy bad lines, if any
93             if mod.bad_lines:
94                 self.bad_lines.extend(
95                     [ModProbeValue(value=line, source=filename) for line in mod.bad_lines]
96                 )
97         super(AllModProbe, self).__init__()
98
```
--- 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/insights/combiners/modprobe.py b/insights/combiners/modprobe.py
--- a/insights/combiners/modprobe.py
+++ b/insights/combiners/modprobe.py
@@ -82,7 +82,7 @@
                 if section not in self.data:
                     self.data[section] = {}
                 for name, value in sectdict.items():
-                    if name in self.data[section]:
+                    if name in self.data[section] and type(self.data[section][name][0]) == list:
                         # append to this module's value - should only
                         # happen for aliases.
                         self.data[section][name][0].append(value)

{"golden_diff": "diff --git a/insights/combiners/modprobe.py b/insights/combiners/modprobe.py\n--- a/insights/combiners/modprobe.py\n+++ b/insights/combiners/modprobe.py\n@@ -82,7 +82,7 @@\n                 if section not in self.data:\n                     self.data[section] = {}\n                 for name, value in sectdict.items():\n-                    if name in self.data[section]:\n+                    if name in self.data[section] and type(self.data[section][name][0]) == list:\n                         # append to this module's value - should only\n                         # happen for aliases.\n                         self.data[section][name][0].append(value)\n", "issue": "The modprobe combiner is raising AttributeError exceptions in production.\nThe AllModProbe combiner is throwing a number of the exception AttributeError(\"'bool' object has no attribute 'append'\",) in production.\n", "before_files": [{"content": "\"\"\"\nModprobe configuration\n======================\n\nThe modprobe configuration files are normally available to rules as a list of\nModProbe objects.  This combiner turns those into one set of data, preserving\nthe original file name that defined modprobe configuration line using a tuple.\n\n\"\"\"\n\nfrom insights.core.plugins import combiner\nfrom insights.parsers.modprobe import ModProbe\nfrom .. import LegacyItemAccess\n\nfrom collections import namedtuple\n\n\nModProbeValue = namedtuple(\"ModProbeValue\", ['value', 'source'])\n\"\"\"\nA value from a ModProbe source\n\"\"\"\n\n\n@combiner(ModProbe)\nclass AllModProbe(LegacyItemAccess):\n    \"\"\"\n    Combiner for accessing all the modprobe configuration files in one\n    structure.\n\n    It's important for our reporting and information purposes to know not\n    only what the configuration was but where it was defined.  Therefore, the\n    format of the data in this combiner is slightly different compared to the\n    ModProbe parser.  Here, each 'value' is actually a 2-tuple, with the\n    actual data first and the file name from whence the value came second.\n    This does mean that you need to pull the value out of each item - e.g.\n    using a list comprehension - but it means that every item is associated\n    with the file it was defined in.\n\n    In line with the ModProbe configuration parser, the actual value is\n    usually a list of the space-separated parts on the line, and the\n    definitions for each module are similarly kept in a list, which makes\n\n    Thanks to the LegacyItemAccess class, this can also be treated as a\n    dictionary for look-ups of data in the `data` attribute.\n\n    Attributes:\n        data (dict): The combined data structures, with each item as a\n            2-tuple, as described above.\n        bad_lines(list): The list of unparseable lines from all files, with\n            each line as a 2-tuple as described above.\n\n    Sample data files::\n\n        /etc/modprobe.conf:\n            # watchdog drivers\n            blacklist i8xx_tco\n\n            # Don't install the Firewire ethernet driver\n            install eth1394 /bin/true\n\n        /etc/modprobe.conf.d/no_ipv6.conf:\n            options ipv6 disable=1\n            install ipv6 /bin/true\n\n    Examples:\n        >>> all_modprobe = shared[AllModProbe]\n        >>> all_modprobe['alias']\n        []\n        >>> all_modprobe['blacklist']\n        {'i8xx_tco': ModProbeValue(True, '/etc/modprobe.conf')}\n        >>> all_modprobe['install']\n        {'eth1394': ModProbeValue(['/bin/true'], '/etc/modprobe.conf'),\n         'ipv6': ModProbeValue(['/bin/true'], '/etc/modprobe.conf.d/no_ipv6.conf')}\n    \"\"\"\n    def __init__(self, modprobe):\n        self.data = {}\n        self.bad_lines = []\n        for mod in modprobe:\n            filename = mod.file_path  # relative path inside archive\n            # Copy data section\n            for section, sectdict in mod.data.items():\n                if section not in self.data:\n                    self.data[section] = {}\n                for name, value in sectdict.items():\n                    if name in self.data[section]:\n                        # append to this module's value - should only\n                        # happen for aliases.\n                        self.data[section][name][0].append(value)\n                    else:\n                        # create new tuple\n                        self.data[section][name] = ModProbeValue(value=value, source=filename)\n            # Copy bad lines, if any\n            if mod.bad_lines:\n                self.bad_lines.extend(\n                    [ModProbeValue(value=line, source=filename) for line in mod.bad_lines]\n                )\n        super(AllModProbe, self).__init__()\n", "path": "insights/combiners/modprobe.py"}], "after_files": [{"content": "\"\"\"\nModprobe configuration\n======================\n\nThe modprobe configuration files are normally available to rules as a list of\nModProbe objects.  This combiner turns those into one set of data, preserving\nthe original file name that defined modprobe configuration line using a tuple.\n\n\"\"\"\n\nfrom insights.core.plugins import combiner\nfrom insights.parsers.modprobe import ModProbe\nfrom .. import LegacyItemAccess\n\nfrom collections import namedtuple\n\n\nModProbeValue = namedtuple(\"ModProbeValue\", ['value', 'source'])\n\"\"\"\nA value from a ModProbe source\n\"\"\"\n\n\n@combiner(ModProbe)\nclass AllModProbe(LegacyItemAccess):\n    \"\"\"\n    Combiner for accessing all the modprobe configuration files in one\n    structure.\n\n    It's important for our reporting and information purposes to know not\n    only what the configuration was but where it was defined.  Therefore, the\n    format of the data in this combiner is slightly different compared to the\n    ModProbe parser.  Here, each 'value' is actually a 2-tuple, with the\n    actual data first and the file name from whence the value came second.\n    This does mean that you need to pull the value out of each item - e.g.\n    using a list comprehension - but it means that every item is associated\n    with the file it was defined in.\n\n    In line with the ModProbe configuration parser, the actual value is\n    usually a list of the space-separated parts on the line, and the\n    definitions for each module are similarly kept in a list, which makes\n\n    Thanks to the LegacyItemAccess class, this can also be treated as a\n    dictionary for look-ups of data in the `data` attribute.\n\n    Attributes:\n        data (dict): The combined data structures, with each item as a\n            2-tuple, as described above.\n        bad_lines(list): The list of unparseable lines from all files, with\n            each line as a 2-tuple as described above.\n\n    Sample data files::\n\n        /etc/modprobe.conf:\n            # watchdog drivers\n            blacklist i8xx_tco\n\n            # Don't install the Firewire ethernet driver\n            install eth1394 /bin/true\n\n        /etc/modprobe.conf.d/no_ipv6.conf:\n            options ipv6 disable=1\n            install ipv6 /bin/true\n\n    Examples:\n        >>> all_modprobe = shared[AllModProbe]\n        >>> all_modprobe['alias']\n        []\n        >>> all_modprobe['blacklist']\n        {'i8xx_tco': ModProbeValue(True, '/etc/modprobe.conf')}\n        >>> all_modprobe['install']\n        {'eth1394': ModProbeValue(['/bin/true'], '/etc/modprobe.conf'),\n         'ipv6': ModProbeValue(['/bin/true'], '/etc/modprobe.conf.d/no_ipv6.conf')}\n    \"\"\"\n    def __init__(self, modprobe):\n        self.data = {}\n        self.bad_lines = []\n        for mod in modprobe:\n            filename = mod.file_path  # relative path inside archive\n            # Copy data section\n            for section, sectdict in mod.data.items():\n                if section not in self.data:\n                    self.data[section] = {}\n                for name, value in sectdict.items():\n                    if name in self.data[section] and type(self.data[section][name][0]) == list:\n                        # append to this module's value - should only\n                        # happen for aliases.\n                        self.data[section][name][0].append(value)\n                    else:\n                        # create new tuple\n                        self.data[section][name] = ModProbeValue(value=value, source=filename)\n            # Copy bad lines, if any\n            if mod.bad_lines:\n                self.bad_lines.extend(\n                    [ModProbeValue(value=line, source=filename) for line in mod.bad_lines]\n                )\n        super(AllModProbe, self).__init__()\n", "path": "insights/combiners/modprobe.py"}]}