prompt: You will be provided with a partial code base and an issue statement explaining a problem to resolve.
  <issue>
  pwn constgrep a throws an exception
  Ugh, this seems wrong:
  
  ```
  root@pwndbg:~# pwn constgrep a
  Traceback (most recent call last):
    File "/usr/local/bin/pwn", line 8, in <module>
      sys.exit(main())
    File "/usr/local/lib/python3.10/dist-packages/pwnlib/commandline/main.py", line 58, in main
      commands[args.command](args)
    File "/usr/local/lib/python3.10/dist-packages/pwnlib/commandline/constgrep.py", line 110, in main
      for _, k in sorted(out):
  TypeError: '<' not supported between instances of 'Constant' and 'type'
  ```
  
  </issue>
  <code>
  [start of pwnlib/commandline/constgrep.py]
  1 from __future__ import absolute_import
  2 from __future__ import division
  3 
  4 import argparse
  5 import functools
  6 import re
  7 
  8 import pwnlib.args
  9 pwnlib.args.free_form = False
  10 
  11 from pwn import *
  12 from pwnlib.commandline import common
  13 
  14 p = common.parser_commands.add_parser(
  15     'constgrep',
  16     help = "Looking up constants from header files.\n\nExample: constgrep -c freebsd -m  ^PROT_ '3 + 4'",
  17     description = "Looking up constants from header files.\n\nExample: constgrep -c freebsd -m  ^PROT_ '3 + 4'",
  18     formatter_class = argparse.RawDescriptionHelpFormatter,
  19 )
  20 
  21 p.add_argument(
  22     '-e', '--exact',
  23     action='store_true',
  24     help='Do an exact match for a constant instead of searching for a regex',
  25 )
  26 
  27 p.add_argument(
  28     'regex',
  29     help='The regex matching constant you want to find',
  30 )
  31 
  32 p.add_argument(
  33     'constant',
  34     nargs = '?',
  35     default = None,
  36     type = safeeval.expr,
  37     help = 'The constant to find',
  38 )
  39 
  40 p.add_argument(
  41     '-i', '--case-insensitive',
  42     action = 'store_true',
  43     help = 'Search case insensitive',
  44 )
  45 
  46 p.add_argument(
  47     '-m', '--mask-mode',
  48     action = 'store_true',
  49     help = 'Instead of searching for a specific constant value, search for values not containing strictly less bits that the given value.',
  50 )
  51 
  52 p.add_argument(
  53     '-c', '--context',
  54     metavar = 'arch_or_os',
  55     action = 'append',
  56     type   = common.context_arg,
  57     choices = common.choices,
  58     help = 'The os/architecture/endianness/bits the shellcode will run in (default: linux/i386), choose from: %s' % common.choices,
  59 )
  60 
  61 def main(args):
  62     if args.exact:
  63         # This is the simple case
  64         print(cpp(args.regex).strip())
  65     else:
  66         # New we search in the right module.
  67         # But first: We find the right module
  68         if context.os == 'freebsd':
  69             mod = constants.freebsd
  70         else:
  71             mod = getattr(getattr(constants, context.os), context.arch)
  72 
  73         # Compile the given regex, for optimized lookup
  74         if args.case_insensitive:
  75             matcher = re.compile(args.regex, re.IGNORECASE)
  76         else:
  77             matcher = re.compile(args.regex)
  78 
  79         # The found matching constants and the length of the longest string
  80         out    = []
  81         maxlen = 0
  82 
  83         constant = args.constant
  84 
  85         for k in dir(mod):
  86             # No python stuff
  87             if k.endswith('__') and k.startswith('__'):
  88                 continue
  89 
  90             # Run the regex
  91             if not matcher.search(k):
  92                 continue
  93 
  94             # Check the constant
  95             if constant is not None:
  96                 val = getattr(mod, k)
  97                 if args.mask_mode:
  98                     if constant & val != val:
  99                         continue
  100                 else:
  101                     if constant != val:
  102                         continue
  103 
  104             # Append it
  105             out.append((getattr(mod, k), k))
  106             maxlen = max(len(k), maxlen)
  107 
  108         # Output all matching constants
  109         for _, k in sorted(out):
  110             print('#define %s %s' % (k.ljust(maxlen), cpp(k).strip()))
  111 
  112         # If we are in match_mode, then try to find a combination of
  113         # constants that yield the exact given value
  114         # We do not want to find combinations using the value 0.
  115         if constant and args.mask_mode:
  116             mask = constant
  117             good = []
  118             out = [(v, k) for v, k in out if v != 0]
  119 
  120             while mask and out:
  121                 cur = out.pop()
  122                 mask &= ~cur[0]
  123                 good.append(cur)
  124 
  125                 out = [(v, k) for v, k in out if mask & v == v]
  126 
  127             if functools.reduce(lambda x, cur: x | cur[0], good, 0) == constant:
  128                 print('')
  129                 print('(%s) == %s' % (' | '.join(k for v, k in good), args.constant))
  130 
  131 if __name__ == '__main__':
  132     pwnlib.commandline.common.main(__file__)
  133
  [end of pwnlib/commandline/constgrep.py]
  </code>
  
  I need you to solve this issue by generating a single patch file that I can apply directly to this repository using git apply. Please respond with a single patch file in the following format.
  <patch>
  diff --git a/file.py b/file.py
  --- a/file.py
  +++ b/file.py
  @@ -1,27 +1,35 @@
   def euclidean(a, b):
  -    while b:
  -        a, b = b, a % b
  -    return a
  +    if b == 0:
  +        return a
  +    return euclidean(b, a % b)
   
   
   def bresenham(x0, y0, x1, y1):
       points = []
       dx = abs(x1 - x0)
       dy = abs(y1 - y0)
  -    sx = 1 if x0 < x1 else -1
  -    sy = 1 if y0 < y1 else -1
  -    err = dx - dy
  +    x, y = x0, y0
  +    sx = -1 if x0 > x1 else 1
  +    sy = -1 if y0 > y1 else 1
   
  -    while True:
  -        points.append((x0, y0))
  -        if x0 == x1 and y0 == y1:
  -            break
  -        e2 = 2 * err
  -        if e2 > -dy:
  -            err -= dy
  -            x0 += sx
  -        if e2 < dx:
  -            err += dx
  -            y0 += sy
  +    if dx > dy:
  +        err = dx / 2.0
  +        while x != x1:
  +            points.append((x, y))
  +            err -= dy
  +            if err < 0:
  +                y += sy
  +                err += dx
  +            x += sx
  +    else:
  +        err = dy / 2.0
  +        while y != y1:
  +            points.append((x, y))
  +            err -= dx
  +            if err < 0:
  +                x += sx
  +                err += dy
  +            y += sy
  +
  +    points.append((x, y))
       return points
  
  </patch>
golden_diff: diff --git a/pwnlib/commandline/constgrep.py b/pwnlib/commandline/constgrep.py
  --- a/pwnlib/commandline/constgrep.py
  +++ b/pwnlib/commandline/constgrep.py
  @@ -91,9 +91,13 @@
               if not matcher.search(k):
                   continue
   
  +            # Check if the value has proper type
  +            val = getattr(mod, k)
  +            if not isinstance(val, pwnlib.constants.constant.Constant):
  +                continue
  +
               # Check the constant
               if constant is not None:
  -                val = getattr(mod, k)
                   if args.mask_mode:
                       if constant & val != val:
                           continue
  @@ -102,7 +106,7 @@
                           continue
   
               # Append it
  -            out.append((getattr(mod, k), k))
  +            out.append((val, k))
               maxlen = max(len(k), maxlen)
   
           # Output all matching constants
  
verification_info: {"golden_diff": "diff --git a/pwnlib/commandline/constgrep.py b/pwnlib/commandline/constgrep.py\n--- a/pwnlib/commandline/constgrep.py\n+++ b/pwnlib/commandline/constgrep.py\n@@ -91,9 +91,13 @@\n             if not matcher.search(k):\n                 continue\n \n+            # Check if the value has proper type\n+            val = getattr(mod, k)\n+            if not isinstance(val, pwnlib.constants.constant.Constant):\n+                continue\n+\n             # Check the constant\n             if constant is not None:\n-                val = getattr(mod, k)\n                 if args.mask_mode:\n                     if constant & val != val:\n                         continue\n@@ -102,7 +106,7 @@\n                         continue\n \n             # Append it\n-            out.append((getattr(mod, k), k))\n+            out.append((val, k))\n             maxlen = max(len(k), maxlen)\n \n         # Output all matching constants\n", "issue": "pwn constgrep a throws an exception\nUgh, this seems wrong:\r\n\r\n```\r\nroot@pwndbg:~# pwn constgrep a\r\nTraceback (most recent call last):\r\n  File \"/usr/local/bin/pwn\", line 8, in <module>\r\n    sys.exit(main())\r\n  File \"/usr/local/lib/python3.10/dist-packages/pwnlib/commandline/main.py\", line 58, in main\r\n    commands[args.command](args)\r\n  File \"/usr/local/lib/python3.10/dist-packages/pwnlib/commandline/constgrep.py\", line 110, in main\r\n    for _, k in sorted(out):\r\nTypeError: '<' not supported between instances of 'Constant' and 'type'\r\n```\n", "before_files": [{"content": "from __future__ import absolute_import\nfrom __future__ import division\n\nimport argparse\nimport functools\nimport re\n\nimport pwnlib.args\npwnlib.args.free_form = False\n\nfrom pwn import *\nfrom pwnlib.commandline import common\n\np = common.parser_commands.add_parser(\n    'constgrep',\n    help = \"Looking up constants from header files.\\n\\nExample: constgrep -c freebsd -m  ^PROT_ '3 + 4'\",\n    description = \"Looking up constants from header files.\\n\\nExample: constgrep -c freebsd -m  ^PROT_ '3 + 4'\",\n    formatter_class = argparse.RawDescriptionHelpFormatter,\n)\n\np.add_argument(\n    '-e', '--exact',\n    action='store_true',\n    help='Do an exact match for a constant instead of searching for a regex',\n)\n\np.add_argument(\n    'regex',\n    help='The regex matching constant you want to find',\n)\n\np.add_argument(\n    'constant',\n    nargs = '?',\n    default = None,\n    type = safeeval.expr,\n    help = 'The constant to find',\n)\n\np.add_argument(\n    '-i', '--case-insensitive',\n    action = 'store_true',\n    help = 'Search case insensitive',\n)\n\np.add_argument(\n    '-m', '--mask-mode',\n    action = 'store_true',\n    help = 'Instead of searching for a specific constant value, search for values not containing strictly less bits that the given value.',\n)\n\np.add_argument(\n    '-c', '--context',\n    metavar = 'arch_or_os',\n    action = 'append',\n    type   = common.context_arg,\n    choices = common.choices,\n    help = 'The os/architecture/endianness/bits the shellcode will run in (default: linux/i386), choose from: %s' % common.choices,\n)\n\ndef main(args):\n    if args.exact:\n        # This is the simple case\n        print(cpp(args.regex).strip())\n    else:\n        # New we search in the right module.\n        # But first: We find the right module\n        if context.os == 'freebsd':\n            mod = constants.freebsd\n        else:\n            mod = getattr(getattr(constants, context.os), context.arch)\n\n        # Compile the given regex, for optimized lookup\n        if args.case_insensitive:\n            matcher = re.compile(args.regex, re.IGNORECASE)\n        else:\n            matcher = re.compile(args.regex)\n\n        # The found matching constants and the length of the longest string\n        out    = []\n        maxlen = 0\n\n        constant = args.constant\n\n        for k in dir(mod):\n            # No python stuff\n            if k.endswith('__') and k.startswith('__'):\n                continue\n\n            # Run the regex\n            if not matcher.search(k):\n                continue\n\n            # Check the constant\n            if constant is not None:\n                val = getattr(mod, k)\n                if args.mask_mode:\n                    if constant & val != val:\n                        continue\n                else:\n                    if constant != val:\n                        continue\n\n            # Append it\n            out.append((getattr(mod, k), k))\n            maxlen = max(len(k), maxlen)\n\n        # Output all matching constants\n        for _, k in sorted(out):\n            print('#define %s %s' % (k.ljust(maxlen), cpp(k).strip()))\n\n        # If we are in match_mode, then try to find a combination of\n        # constants that yield the exact given value\n        # We do not want to find combinations using the value 0.\n        if constant and args.mask_mode:\n            mask = constant\n            good = []\n            out = [(v, k) for v, k in out if v != 0]\n\n            while mask and out:\n                cur = out.pop()\n                mask &= ~cur[0]\n                good.append(cur)\n\n                out = [(v, k) for v, k in out if mask & v == v]\n\n            if functools.reduce(lambda x, cur: x | cur[0], good, 0) == constant:\n                print('')\n                print('(%s) == %s' % (' | '.join(k for v, k in good), args.constant))\n\nif __name__ == '__main__':\n    pwnlib.commandline.common.main(__file__)\n", "path": "pwnlib/commandline/constgrep.py"}]}