We are currently solving the following issue within our repository. Here is the issue text:
--- BEGIN ISSUE ---
bug of function get_load_segment_info in readelf.py
when I got readelf result like below
```
readelf --program-headers /bin/ls | grep "LOAD" -A 10
  LOAD           0x0000000000000000 0x0000000000400000 0x0000000000400000
                 0x000000000001da64 0x000000000001da64  R E    200000
```
the function crashed at line 65
```
65   fsize, msize, read, write, execute, align = re_secnd.match(line).groups()
```
the reason is in the regex format
```python
re_secnd = re.compile(r"\s+(0x[0-9A-Fa-f]+) (0x[0-9A-Fa-f]+)  (.)(.)(.)\s+(**0x**[0-9A-Fa-f]+)"
```
I mean, "0x" should not a absolute prefix of align number

--- END ISSUE ---

Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
--- BEGIN FILES ---
Path: `pwndbg/wrappers/readelf.py`
Content:
```
1 #!/usr/bin/env python
2 # -*- coding: utf-8 -*-
3 from __future__ import absolute_import
4 from __future__ import division
5 from __future__ import print_function
6 from __future__ import unicode_literals
7 
8 import re
9 
10 import pwndbg.wrappers
11 
12 cmd_name = "readelf"
13 
14 @pwndbg.wrappers.OnlyWithCommand(cmd_name)
15 def get_jmpslots():
16     local_path = pwndbg.file.get_file(pwndbg.proc.exe)
17     cmd = [get_jmpslots.cmd_path, "--relocs", local_path]
18     readelf_out = pwndbg.wrappers.call_cmd(cmd)
19 
20     return filter(_extract_jumps, readelf_out.splitlines())
21 
22 def _extract_jumps(line):
23     '''
24      Checks for records in `readelf --relocs <binary>` which has type e.g. `R_X86_64_JUMP_SLO`
25      NOTE: Because of that we DO NOT display entries that are not writeable (due to FULL RELRO)
26      as they have `R_X86_64_GLOB_DAT` type.
27 
28     It might be good to display them seperately in the future.
29     '''
30     try:
31         if "JUMP" in line.split()[2]:
32             return line
33         else:
34             return False
35     except IndexError:
36         return False
37 
38 @pwndbg.wrappers.OnlyWithCommand(cmd_name)
39 def get_load_segment_info():
40     '''
41     Looks for LOAD sections by parsing the output of `readelf --program-headers <binary>`
42     '''
43     local_path = pwndbg.file.get_file(pwndbg.proc.exe)
44     cmd = [get_jmpslots.cmd_path, "--program-headers", local_path]
45     readelf_out = pwndbg.wrappers.call_cmd(cmd)
46 
47     segments = []
48     load_found = False
49 
50     # Output from readelf is 
51     # Type           Offset             VirtAddr           PhysAddr
52     #                FileSiz            MemSiz             Flags  Align
53     # LOAD           0x0000000000000000 0x0000000000000000 0x0000000000000000
54     #                0x0000000000000830 0x0000000000000830  R E    0x200000
55     # Account for this using two regular expressions
56     re_first = re.compile(r"\s+LOAD\s+(0x[0-9A-Fa-f]+) (0x[0-9A-Fa-f]+) (0x[0-9A-Fa-f]+)")
57     re_secnd = re.compile(r"\s+(0x[0-9A-Fa-f]+) (0x[0-9A-Fa-f]+)  (.)(.)(.)\s+(0x[0-9A-Fa-f]+)")
58     hex2int = lambda x: int(x, 16)
59 
60     for line in readelf_out.splitlines():
61         if "LOAD" in line:
62             load_found = True
63             offset, vaddr, paddr = map(hex2int, re_first.match(line).groups())
64         elif load_found:
65             fsize, msize, read, write, execute, align = re_secnd.match(line).groups()
66             fsize, msize, align = map(hex2int, (fsize, msize, align))
67             read = read == "R"
68             write = write == "W"
69             execute = execute == "E"
70 
71             segments.append({"Offset":   offset,
72                              "VirtAddr": vaddr,
73                              "PhysAddr": paddr,
74                              "FileSiz": fsize,
75                              "MemSiz": msize,
76                              "FlagsRead": read,
77                              "FlagsWrite": write,
78                              "FlagsExecute": execute})
79 
80             load_found = False
81 
82     return segments
83
```
--- 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/pwndbg/wrappers/readelf.py b/pwndbg/wrappers/readelf.py
--- a/pwndbg/wrappers/readelf.py
+++ b/pwndbg/wrappers/readelf.py
@@ -52,9 +52,15 @@
     #                FileSiz            MemSiz             Flags  Align
     # LOAD           0x0000000000000000 0x0000000000000000 0x0000000000000000
     #                0x0000000000000830 0x0000000000000830  R E    0x200000
+    #
+    ############################################################################
+    #
+    # NOTE: On some readelf versions the Align column might not be prefixed with 0x
+    # See https://github.com/pwndbg/pwndbg/issues/427
+    #
     # Account for this using two regular expressions
     re_first = re.compile(r"\s+LOAD\s+(0x[0-9A-Fa-f]+) (0x[0-9A-Fa-f]+) (0x[0-9A-Fa-f]+)")
-    re_secnd = re.compile(r"\s+(0x[0-9A-Fa-f]+) (0x[0-9A-Fa-f]+)  (.)(.)(.)\s+(0x[0-9A-Fa-f]+)")
+    re_secnd = re.compile(r"\s+(0x[0-9A-Fa-f]+) (0x[0-9A-Fa-f]+)  (.)(.)(.)\s+(0x)?([0-9A-Fa-f]+)")
     hex2int = lambda x: int(x, 16)
 
     for line in readelf_out.splitlines():
@@ -62,8 +68,8 @@
             load_found = True
             offset, vaddr, paddr = map(hex2int, re_first.match(line).groups())
         elif load_found:
-            fsize, msize, read, write, execute, align = re_secnd.match(line).groups()
-            fsize, msize, align = map(hex2int, (fsize, msize, align))
+            fsize, msize, read, write, execute, _optional_prefix, align = re_secnd.match(line).groups()
+            fsize, msize, align = map(hex2int, (fsize, msize, '0x' + align))
             read = read == "R"
             write = write == "W"
             execute = execute == "E"

{"golden_diff": "diff --git a/pwndbg/wrappers/readelf.py b/pwndbg/wrappers/readelf.py\n--- a/pwndbg/wrappers/readelf.py\n+++ b/pwndbg/wrappers/readelf.py\n@@ -52,9 +52,15 @@\n     #                FileSiz            MemSiz             Flags  Align\n     # LOAD           0x0000000000000000 0x0000000000000000 0x0000000000000000\n     #                0x0000000000000830 0x0000000000000830  R E    0x200000\n+    #\n+    ############################################################################\n+    #\n+    # NOTE: On some readelf versions the Align column might not be prefixed with 0x\n+    # See https://github.com/pwndbg/pwndbg/issues/427\n+    #\n     # Account for this using two regular expressions\n     re_first = re.compile(r\"\\s+LOAD\\s+(0x[0-9A-Fa-f]+) (0x[0-9A-Fa-f]+) (0x[0-9A-Fa-f]+)\")\n-    re_secnd = re.compile(r\"\\s+(0x[0-9A-Fa-f]+) (0x[0-9A-Fa-f]+)  (.)(.)(.)\\s+(0x[0-9A-Fa-f]+)\")\n+    re_secnd = re.compile(r\"\\s+(0x[0-9A-Fa-f]+) (0x[0-9A-Fa-f]+)  (.)(.)(.)\\s+(0x)?([0-9A-Fa-f]+)\")\n     hex2int = lambda x: int(x, 16)\n \n     for line in readelf_out.splitlines():\n@@ -62,8 +68,8 @@\n             load_found = True\n             offset, vaddr, paddr = map(hex2int, re_first.match(line).groups())\n         elif load_found:\n-            fsize, msize, read, write, execute, align = re_secnd.match(line).groups()\n-            fsize, msize, align = map(hex2int, (fsize, msize, align))\n+            fsize, msize, read, write, execute, _optional_prefix, align = re_secnd.match(line).groups()\n+            fsize, msize, align = map(hex2int, (fsize, msize, '0x' + align))\n             read = read == \"R\"\n             write = write == \"W\"\n             execute = execute == \"E\"\n", "issue": "bug of function get_load_segment_info in readelf.py\nwhen I got readelf result like below\r\n```\r\nreadelf --program-headers /bin/ls | grep \"LOAD\" -A 10\r\n  LOAD           0x0000000000000000 0x0000000000400000 0x0000000000400000\r\n                 0x000000000001da64 0x000000000001da64  R E    200000\r\n```\r\nthe function crashed at line 65\r\n```\r\n65   fsize, msize, read, write, execute, align = re_secnd.match(line).groups()\r\n```\r\nthe reason is in the regex format\r\n```python\r\nre_secnd = re.compile(r\"\\s+(0x[0-9A-Fa-f]+) (0x[0-9A-Fa-f]+)  (.)(.)(.)\\s+(**0x**[0-9A-Fa-f]+)\"\r\n```\r\nI mean, \"0x\" should not a absolute prefix of align number\n", "before_files": [{"content": "#!/usr/bin/env python\n# -*- coding: utf-8 -*-\nfrom __future__ import absolute_import\nfrom __future__ import division\nfrom __future__ import print_function\nfrom __future__ import unicode_literals\n\nimport re\n\nimport pwndbg.wrappers\n\ncmd_name = \"readelf\"\n\n@pwndbg.wrappers.OnlyWithCommand(cmd_name)\ndef get_jmpslots():\n    local_path = pwndbg.file.get_file(pwndbg.proc.exe)\n    cmd = [get_jmpslots.cmd_path, \"--relocs\", local_path]\n    readelf_out = pwndbg.wrappers.call_cmd(cmd)\n\n    return filter(_extract_jumps, readelf_out.splitlines())\n\ndef _extract_jumps(line):\n    '''\n     Checks for records in `readelf --relocs <binary>` which has type e.g. `R_X86_64_JUMP_SLO`\n     NOTE: Because of that we DO NOT display entries that are not writeable (due to FULL RELRO)\n     as they have `R_X86_64_GLOB_DAT` type.\n\n    It might be good to display them seperately in the future.\n    '''\n    try:\n        if \"JUMP\" in line.split()[2]:\n            return line\n        else:\n            return False\n    except IndexError:\n        return False\n\n@pwndbg.wrappers.OnlyWithCommand(cmd_name)\ndef get_load_segment_info():\n    '''\n    Looks for LOAD sections by parsing the output of `readelf --program-headers <binary>`\n    '''\n    local_path = pwndbg.file.get_file(pwndbg.proc.exe)\n    cmd = [get_jmpslots.cmd_path, \"--program-headers\", local_path]\n    readelf_out = pwndbg.wrappers.call_cmd(cmd)\n\n    segments = []\n    load_found = False\n\n    # Output from readelf is \n    # Type           Offset             VirtAddr           PhysAddr\n    #                FileSiz            MemSiz             Flags  Align\n    # LOAD           0x0000000000000000 0x0000000000000000 0x0000000000000000\n    #                0x0000000000000830 0x0000000000000830  R E    0x200000\n    # Account for this using two regular expressions\n    re_first = re.compile(r\"\\s+LOAD\\s+(0x[0-9A-Fa-f]+) (0x[0-9A-Fa-f]+) (0x[0-9A-Fa-f]+)\")\n    re_secnd = re.compile(r\"\\s+(0x[0-9A-Fa-f]+) (0x[0-9A-Fa-f]+)  (.)(.)(.)\\s+(0x[0-9A-Fa-f]+)\")\n    hex2int = lambda x: int(x, 16)\n\n    for line in readelf_out.splitlines():\n        if \"LOAD\" in line:\n            load_found = True\n            offset, vaddr, paddr = map(hex2int, re_first.match(line).groups())\n        elif load_found:\n            fsize, msize, read, write, execute, align = re_secnd.match(line).groups()\n            fsize, msize, align = map(hex2int, (fsize, msize, align))\n            read = read == \"R\"\n            write = write == \"W\"\n            execute = execute == \"E\"\n\n            segments.append({\"Offset\":   offset,\n                             \"VirtAddr\": vaddr,\n                             \"PhysAddr\": paddr,\n                             \"FileSiz\": fsize,\n                             \"MemSiz\": msize,\n                             \"FlagsRead\": read,\n                             \"FlagsWrite\": write,\n                             \"FlagsExecute\": execute})\n\n            load_found = False\n\n    return segments\n", "path": "pwndbg/wrappers/readelf.py"}], "after_files": [{"content": "#!/usr/bin/env python\n# -*- coding: utf-8 -*-\nfrom __future__ import absolute_import\nfrom __future__ import division\nfrom __future__ import print_function\nfrom __future__ import unicode_literals\n\nimport re\n\nimport pwndbg.wrappers\n\ncmd_name = \"readelf\"\n\n@pwndbg.wrappers.OnlyWithCommand(cmd_name)\ndef get_jmpslots():\n    local_path = pwndbg.file.get_file(pwndbg.proc.exe)\n    cmd = [get_jmpslots.cmd_path, \"--relocs\", local_path]\n    readelf_out = pwndbg.wrappers.call_cmd(cmd)\n\n    return filter(_extract_jumps, readelf_out.splitlines())\n\ndef _extract_jumps(line):\n    '''\n     Checks for records in `readelf --relocs <binary>` which has type e.g. `R_X86_64_JUMP_SLO`\n     NOTE: Because of that we DO NOT display entries that are not writeable (due to FULL RELRO)\n     as they have `R_X86_64_GLOB_DAT` type.\n\n    It might be good to display them seperately in the future.\n    '''\n    try:\n        if \"JUMP\" in line.split()[2]:\n            return line\n        else:\n            return False\n    except IndexError:\n        return False\n\n@pwndbg.wrappers.OnlyWithCommand(cmd_name)\ndef get_load_segment_info():\n    '''\n    Looks for LOAD sections by parsing the output of `readelf --program-headers <binary>`\n    '''\n    local_path = pwndbg.file.get_file(pwndbg.proc.exe)\n    cmd = [get_jmpslots.cmd_path, \"--program-headers\", local_path]\n    readelf_out = pwndbg.wrappers.call_cmd(cmd)\n\n    segments = []\n    load_found = False\n\n    # Output from readelf is \n    # Type           Offset             VirtAddr           PhysAddr\n    #                FileSiz            MemSiz             Flags  Align\n    # LOAD           0x0000000000000000 0x0000000000000000 0x0000000000000000\n    #                0x0000000000000830 0x0000000000000830  R E    0x200000\n    #\n    ############################################################################\n    #\n    # NOTE: On some readelf versions the Align column might not be prefixed with 0x\n    # See https://github.com/pwndbg/pwndbg/issues/427\n    #\n    # Account for this using two regular expressions\n    re_first = re.compile(r\"\\s+LOAD\\s+(0x[0-9A-Fa-f]+) (0x[0-9A-Fa-f]+) (0x[0-9A-Fa-f]+)\")\n    re_secnd = re.compile(r\"\\s+(0x[0-9A-Fa-f]+) (0x[0-9A-Fa-f]+)  (.)(.)(.)\\s+(0x)?([0-9A-Fa-f]+)\")\n    hex2int = lambda x: int(x, 16)\n\n    for line in readelf_out.splitlines():\n        if \"LOAD\" in line:\n            load_found = True\n            offset, vaddr, paddr = map(hex2int, re_first.match(line).groups())\n        elif load_found:\n            fsize, msize, read, write, execute, _optional_prefix, align = re_secnd.match(line).groups()\n            fsize, msize, align = map(hex2int, (fsize, msize, '0x' + align))\n            read = read == \"R\"\n            write = write == \"W\"\n            execute = execute == \"E\"\n\n            segments.append({\"Offset\":   offset,\n                             \"VirtAddr\": vaddr,\n                             \"PhysAddr\": paddr,\n                             \"FileSiz\": fsize,\n                             \"MemSiz\": msize,\n                             \"FlagsRead\": read,\n                             \"FlagsWrite\": write,\n                             \"FlagsExecute\": execute})\n\n            load_found = False\n\n    return segments\n", "path": "pwndbg/wrappers/readelf.py"}]}