prompt: We are currently solving the following issue within our repository. Here is the issue text:
  --- BEGIN ISSUE ---
  Improvements on solc-version detectors
  The allowed version is out of date:
  https://github.com/crytic/slither/blob/0891f9a8a5e5e096084476e4b2bd292c3685f251/slither/detectors/attributes/incorrect_solc.py#L39
  
  Due to the frequent solc release, we might want to change the logic to allow future releases.
  
  Additionally:
  - 0.5.5 should not be used: https://twitter.com/ethchris/status/1105903546602528768
  - the wiki link is incorrect
  
  --- END ISSUE ---
  
  Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
  --- BEGIN FILES ---
  Path: `slither/detectors/attributes/incorrect_solc.py`
  Content:
  ```
  1 """
  2     Check if an incorrect version of solc is used
  3 """
  4 
  5 from slither.detectors.abstract_detector import AbstractDetector, DetectorClassification
  6 import re
  7 
  8 # group:
  9 # 0: ^ > >= < <= (optional)
  10 # 1: ' ' (optional)
  11 # 2: version number
  12 # 3: version number
  13 # 4: version number
  14 PATTERN = re.compile('(\^|>|>=|<|<=)?([ ]+)?(\d+)\.(\d+)\.(\d+)')
  15 
  16 class IncorrectSolc(AbstractDetector):
  17     """
  18     Check if an old version of solc is used
  19     """
  20 
  21     ARGUMENT = 'solc-version'
  22     HELP = 'Incorrect Solidity version (< 0.4.24 or complex pragma)'
  23     IMPACT = DetectorClassification.INFORMATIONAL
  24     CONFIDENCE = DetectorClassification.HIGH
  25 
  26     WIKI = 'https://github.com/crytic/slither/wiki/Detector-Documentation#incorrect-version-of-solidity'
  27 
  28     WIKI_TITLE = 'Incorrect versions of Solidity'
  29     WIKI_DESCRIPTION = '''
  30 Solc frequently releases new compiler versions. Using an old version prevents access to new Solidity security checks.
  31 We recommend avoiding complex pragma statement.'''
  32     WIKI_RECOMMENDATION = 'Use Solidity 0.4.25 or 0.5.2.'
  33 
  34     COMPLEX_PRAGMA = "is too complex"
  35     OLD_VERSION = "allows old versions"
  36     LESS_THAN = "uses lesser than"
  37 
  38     # Indicates the allowed versions.
  39     ALLOWED_VERSIONS = ["0.4.24", "0.4.25", "0.5.2", "0.5.3"]
  40 
  41     def _check_version(self, version):
  42         op = version[0]
  43         if op and not op in ['>', '>=', '^']:
  44             return self.LESS_THAN
  45         version_number = '.'.join(version[2:])
  46         if version_number not in self.ALLOWED_VERSIONS:
  47             return self.OLD_VERSION
  48         return None
  49 
  50     def _check_pragma(self, version):
  51         versions = PATTERN.findall(version)
  52         if len(versions) == 1:
  53             version = versions[0]
  54             return self._check_version(version)
  55         elif len(versions) == 2:
  56             version_left = versions[0]
  57             version_right = versions[1]
  58             # Only allow two elements if the second one is
  59             # <0.5.0 or <0.6.0
  60             if version_right not in [('<', '', '0', '5', '0'), ('<', '', '0', '6', '0')]:
  61                 return self.COMPLEX_PRAGMA
  62             return self._check_version(version_left)
  63         else:
  64             return self.COMPLEX_PRAGMA
  65     def _detect(self):
  66         """
  67         Detects pragma statements that allow for outdated solc versions.
  68         :return: Returns the relevant JSON data for the findings.
  69         """
  70         # Detect all version related pragmas and check if they are disallowed.
  71         results = []
  72         pragma = self.slither.pragma_directives
  73         disallowed_pragmas = []
  74         detected_version = False
  75         for p in pragma:
  76             # Skip any pragma directives which do not refer to version
  77             if len(p.directive) < 1 or p.directive[0] != "solidity":
  78                 continue
  79 
  80             # This is version, so we test if this is disallowed.
  81             detected_version = True
  82             reason = self._check_pragma(p.version)
  83             if reason:
  84                 disallowed_pragmas.append((reason, p))
  85 
  86         # If we found any disallowed pragmas, we output our findings.
  87         if disallowed_pragmas:
  88             for (reason, p) in disallowed_pragmas:
  89                 info = f"Pragma version \"{p.version}\" {reason} ({p.source_mapping_str})\n"
  90 
  91                 json = self.generate_json_result(info)
  92                 self.add_pragma_to_json(p, json)
  93                 results.append(json)
  94 
  95         return results
  96
  ```
  --- 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()
  
  ```
  
golden_diff: diff --git a/slither/detectors/attributes/incorrect_solc.py b/slither/detectors/attributes/incorrect_solc.py
  --- a/slither/detectors/attributes/incorrect_solc.py
  +++ b/slither/detectors/attributes/incorrect_solc.py
  @@ -23,31 +23,43 @@
       IMPACT = DetectorClassification.INFORMATIONAL
       CONFIDENCE = DetectorClassification.HIGH
   
  -    WIKI = 'https://github.com/crytic/slither/wiki/Detector-Documentation#incorrect-version-of-solidity'
  +    WIKI = 'https://github.com/crytic/slither/wiki/Detector-Documentation#incorrect-versions-of-solidity'
   
       WIKI_TITLE = 'Incorrect versions of Solidity'
       WIKI_DESCRIPTION = '''
   Solc frequently releases new compiler versions. Using an old version prevents access to new Solidity security checks.
   We recommend avoiding complex pragma statement.'''
  -    WIKI_RECOMMENDATION = 'Use Solidity 0.4.25 or 0.5.2.'
  +    WIKI_RECOMMENDATION = '''
  +Use Solidity 0.4.25 or 0.5.3. Consider using the latest version of Solidity for testing the compilation, and a trusted version for deploying.'''
   
  -    COMPLEX_PRAGMA = "is too complex"
  -    OLD_VERSION = "allows old versions"
  -    LESS_THAN = "uses lesser than"
  +    COMPLEX_PRAGMA_TXT = "is too complex"
  +    OLD_VERSION_TXT = "allows old versions"
  +    LESS_THAN_TXT = "uses lesser than"
  +
  +    TOO_RECENT_VERSION_TXT = "necessitates versions too recent to be trusted. Consider deploying with 0.5.3"
  +    BUGGY_VERSION_TXT = "is known to contain severe issue (https://solidity.readthedocs.io/en/v0.5.8/bugs.html)"
   
       # Indicates the allowed versions.
  -    ALLOWED_VERSIONS = ["0.4.24", "0.4.25", "0.5.2", "0.5.3"]
  +    ALLOWED_VERSIONS = ["0.4.25", "0.4.26", "0.5.3"]
  +    # Indicates the versions too recent.
  +    TOO_RECENT_VERSIONS = ["0.5.4", "0.5.7", "0.5.8", "0.5.9", "0.5.10"]
  +    # Indicates the versions that should not be used.
  +    BUGGY_VERSIONS = ["0.4.22", "0.5.5", "0.5.6", "^0.4.22", "^0.5.5", "^0.5.6"]
   
       def _check_version(self, version):
           op = version[0]
           if op and not op in ['>', '>=', '^']:
  -            return self.LESS_THAN
  +            return self.LESS_THAN_TXT
           version_number = '.'.join(version[2:])
           if version_number not in self.ALLOWED_VERSIONS:
  -            return self.OLD_VERSION
  +            if version_number in self.TOO_RECENT_VERSIONS:
  +                return self.TOO_RECENT_VERSION_TXT
  +            return self.OLD_VERSION_TXT
           return None
   
       def _check_pragma(self, version):
  +        if version in self.BUGGY_VERSIONS:
  +            return self.BUGGY_VERSION_TXT
           versions = PATTERN.findall(version)
           if len(versions) == 1:
               version = versions[0]
  @@ -58,10 +70,10 @@
               # Only allow two elements if the second one is
               # <0.5.0 or <0.6.0
               if version_right not in [('<', '', '0', '5', '0'), ('<', '', '0', '6', '0')]:
  -                return self.COMPLEX_PRAGMA
  +                return self.COMPLEX_PRAGMA_TXT
               return self._check_version(version_left)
           else:
  -            return self.COMPLEX_PRAGMA
  +            return self.COMPLEX_PRAGMA_TXT
       def _detect(self):
           """
           Detects pragma statements that allow for outdated solc versions.
  
verification_info: {"golden_diff": "diff --git a/slither/detectors/attributes/incorrect_solc.py b/slither/detectors/attributes/incorrect_solc.py\n--- a/slither/detectors/attributes/incorrect_solc.py\n+++ b/slither/detectors/attributes/incorrect_solc.py\n@@ -23,31 +23,43 @@\n     IMPACT = DetectorClassification.INFORMATIONAL\n     CONFIDENCE = DetectorClassification.HIGH\n \n-    WIKI = 'https://github.com/crytic/slither/wiki/Detector-Documentation#incorrect-version-of-solidity'\n+    WIKI = 'https://github.com/crytic/slither/wiki/Detector-Documentation#incorrect-versions-of-solidity'\n \n     WIKI_TITLE = 'Incorrect versions of Solidity'\n     WIKI_DESCRIPTION = '''\n Solc frequently releases new compiler versions. Using an old version prevents access to new Solidity security checks.\n We recommend avoiding complex pragma statement.'''\n-    WIKI_RECOMMENDATION = 'Use Solidity 0.4.25 or 0.5.2.'\n+    WIKI_RECOMMENDATION = '''\n+Use Solidity 0.4.25 or 0.5.3. Consider using the latest version of Solidity for testing the compilation, and a trusted version for deploying.'''\n \n-    COMPLEX_PRAGMA = \"is too complex\"\n-    OLD_VERSION = \"allows old versions\"\n-    LESS_THAN = \"uses lesser than\"\n+    COMPLEX_PRAGMA_TXT = \"is too complex\"\n+    OLD_VERSION_TXT = \"allows old versions\"\n+    LESS_THAN_TXT = \"uses lesser than\"\n+\n+    TOO_RECENT_VERSION_TXT = \"necessitates versions too recent to be trusted. Consider deploying with 0.5.3\"\n+    BUGGY_VERSION_TXT = \"is known to contain severe issue (https://solidity.readthedocs.io/en/v0.5.8/bugs.html)\"\n \n     # Indicates the allowed versions.\n-    ALLOWED_VERSIONS = [\"0.4.24\", \"0.4.25\", \"0.5.2\", \"0.5.3\"]\n+    ALLOWED_VERSIONS = [\"0.4.25\", \"0.4.26\", \"0.5.3\"]\n+    # Indicates the versions too recent.\n+    TOO_RECENT_VERSIONS = [\"0.5.4\", \"0.5.7\", \"0.5.8\", \"0.5.9\", \"0.5.10\"]\n+    # Indicates the versions that should not be used.\n+    BUGGY_VERSIONS = [\"0.4.22\", \"0.5.5\", \"0.5.6\", \"^0.4.22\", \"^0.5.5\", \"^0.5.6\"]\n \n     def _check_version(self, version):\n         op = version[0]\n         if op and not op in ['>', '>=', '^']:\n-            return self.LESS_THAN\n+            return self.LESS_THAN_TXT\n         version_number = '.'.join(version[2:])\n         if version_number not in self.ALLOWED_VERSIONS:\n-            return self.OLD_VERSION\n+            if version_number in self.TOO_RECENT_VERSIONS:\n+                return self.TOO_RECENT_VERSION_TXT\n+            return self.OLD_VERSION_TXT\n         return None\n \n     def _check_pragma(self, version):\n+        if version in self.BUGGY_VERSIONS:\n+            return self.BUGGY_VERSION_TXT\n         versions = PATTERN.findall(version)\n         if len(versions) == 1:\n             version = versions[0]\n@@ -58,10 +70,10 @@\n             # Only allow two elements if the second one is\n             # <0.5.0 or <0.6.0\n             if version_right not in [('<', '', '0', '5', '0'), ('<', '', '0', '6', '0')]:\n-                return self.COMPLEX_PRAGMA\n+                return self.COMPLEX_PRAGMA_TXT\n             return self._check_version(version_left)\n         else:\n-            return self.COMPLEX_PRAGMA\n+            return self.COMPLEX_PRAGMA_TXT\n     def _detect(self):\n         \"\"\"\n         Detects pragma statements that allow for outdated solc versions.\n", "issue": "Improvements on solc-version detectors\nThe allowed version is out of date:\r\nhttps://github.com/crytic/slither/blob/0891f9a8a5e5e096084476e4b2bd292c3685f251/slither/detectors/attributes/incorrect_solc.py#L39\r\n\r\nDue to the frequent solc release, we might want to change the logic to allow future releases.\r\n\r\nAdditionally:\r\n- 0.5.5 should not be used: https://twitter.com/ethchris/status/1105903546602528768\r\n- the wiki link is incorrect\n", "before_files": [{"content": "\"\"\"\n    Check if an incorrect version of solc is used\n\"\"\"\n\nfrom slither.detectors.abstract_detector import AbstractDetector, DetectorClassification\nimport re\n\n# group:\n# 0: ^ > >= < <= (optional)\n# 1: ' ' (optional)\n# 2: version number\n# 3: version number\n# 4: version number\nPATTERN = re.compile('(\\^|>|>=|<|<=)?([ ]+)?(\\d+)\\.(\\d+)\\.(\\d+)')\n\nclass IncorrectSolc(AbstractDetector):\n    \"\"\"\n    Check if an old version of solc is used\n    \"\"\"\n\n    ARGUMENT = 'solc-version'\n    HELP = 'Incorrect Solidity version (< 0.4.24 or complex pragma)'\n    IMPACT = DetectorClassification.INFORMATIONAL\n    CONFIDENCE = DetectorClassification.HIGH\n\n    WIKI = 'https://github.com/crytic/slither/wiki/Detector-Documentation#incorrect-version-of-solidity'\n\n    WIKI_TITLE = 'Incorrect versions of Solidity'\n    WIKI_DESCRIPTION = '''\nSolc frequently releases new compiler versions. Using an old version prevents access to new Solidity security checks.\nWe recommend avoiding complex pragma statement.'''\n    WIKI_RECOMMENDATION = 'Use Solidity 0.4.25 or 0.5.2.'\n\n    COMPLEX_PRAGMA = \"is too complex\"\n    OLD_VERSION = \"allows old versions\"\n    LESS_THAN = \"uses lesser than\"\n\n    # Indicates the allowed versions.\n    ALLOWED_VERSIONS = [\"0.4.24\", \"0.4.25\", \"0.5.2\", \"0.5.3\"]\n\n    def _check_version(self, version):\n        op = version[0]\n        if op and not op in ['>', '>=', '^']:\n            return self.LESS_THAN\n        version_number = '.'.join(version[2:])\n        if version_number not in self.ALLOWED_VERSIONS:\n            return self.OLD_VERSION\n        return None\n\n    def _check_pragma(self, version):\n        versions = PATTERN.findall(version)\n        if len(versions) == 1:\n            version = versions[0]\n            return self._check_version(version)\n        elif len(versions) == 2:\n            version_left = versions[0]\n            version_right = versions[1]\n            # Only allow two elements if the second one is\n            # <0.5.0 or <0.6.0\n            if version_right not in [('<', '', '0', '5', '0'), ('<', '', '0', '6', '0')]:\n                return self.COMPLEX_PRAGMA\n            return self._check_version(version_left)\n        else:\n            return self.COMPLEX_PRAGMA\n    def _detect(self):\n        \"\"\"\n        Detects pragma statements that allow for outdated solc versions.\n        :return: Returns the relevant JSON data for the findings.\n        \"\"\"\n        # Detect all version related pragmas and check if they are disallowed.\n        results = []\n        pragma = self.slither.pragma_directives\n        disallowed_pragmas = []\n        detected_version = False\n        for p in pragma:\n            # Skip any pragma directives which do not refer to version\n            if len(p.directive) < 1 or p.directive[0] != \"solidity\":\n                continue\n\n            # This is version, so we test if this is disallowed.\n            detected_version = True\n            reason = self._check_pragma(p.version)\n            if reason:\n                disallowed_pragmas.append((reason, p))\n\n        # If we found any disallowed pragmas, we output our findings.\n        if disallowed_pragmas:\n            for (reason, p) in disallowed_pragmas:\n                info = f\"Pragma version \\\"{p.version}\\\" {reason} ({p.source_mapping_str})\\n\"\n\n                json = self.generate_json_result(info)\n                self.add_pragma_to_json(p, json)\n                results.append(json)\n\n        return results\n", "path": "slither/detectors/attributes/incorrect_solc.py"}], "after_files": [{"content": "\"\"\"\n    Check if an incorrect version of solc is used\n\"\"\"\n\nfrom slither.detectors.abstract_detector import AbstractDetector, DetectorClassification\nimport re\n\n# group:\n# 0: ^ > >= < <= (optional)\n# 1: ' ' (optional)\n# 2: version number\n# 3: version number\n# 4: version number\nPATTERN = re.compile('(\\^|>|>=|<|<=)?([ ]+)?(\\d+)\\.(\\d+)\\.(\\d+)')\n\nclass IncorrectSolc(AbstractDetector):\n    \"\"\"\n    Check if an old version of solc is used\n    \"\"\"\n\n    ARGUMENT = 'solc-version'\n    HELP = 'Incorrect Solidity version (< 0.4.24 or complex pragma)'\n    IMPACT = DetectorClassification.INFORMATIONAL\n    CONFIDENCE = DetectorClassification.HIGH\n\n    WIKI = 'https://github.com/crytic/slither/wiki/Detector-Documentation#incorrect-versions-of-solidity'\n\n    WIKI_TITLE = 'Incorrect versions of Solidity'\n    WIKI_DESCRIPTION = '''\nSolc frequently releases new compiler versions. Using an old version prevents access to new Solidity security checks.\nWe recommend avoiding complex pragma statement.'''\n    WIKI_RECOMMENDATION = '''\nUse Solidity 0.4.25 or 0.5.3. Consider using the latest version of Solidity for testing the compilation, and a trusted version for deploying.'''\n\n    COMPLEX_PRAGMA_TXT = \"is too complex\"\n    OLD_VERSION_TXT = \"allows old versions\"\n    LESS_THAN_TXT = \"uses lesser than\"\n\n    TOO_RECENT_VERSION_TXT = \"necessitates versions too recent to be trusted. Consider deploying with 0.5.3\"\n    BUGGY_VERSION_TXT = \"is known to contain severe issue (https://solidity.readthedocs.io/en/v0.5.8/bugs.html)\"\n\n    # Indicates the allowed versions.\n    ALLOWED_VERSIONS = [\"0.4.25\", \"0.4.26\", \"0.5.3\"]\n    # Indicates the versions too recent.\n    TOO_RECENT_VERSIONS = [\"0.5.4\", \"0.5.7\", \"0.5.8\", \"0.5.9\", \"0.5.10\"]\n    # Indicates the versions that should not be used.\n    BUGGY_VERSIONS = [\"0.4.22\", \"0.5.5\", \"0.5.6\", \"^0.4.22\", \"^0.5.5\", \"^0.5.6\"]\n\n    def _check_version(self, version):\n        op = version[0]\n        if op and not op in ['>', '>=', '^']:\n            return self.LESS_THAN_TXT\n        version_number = '.'.join(version[2:])\n        if version_number not in self.ALLOWED_VERSIONS:\n            if version_number in self.TOO_RECENT_VERSIONS:\n                return self.TOO_RECENT_VERSION_TXT\n            return self.OLD_VERSION_TXT\n        return None\n\n    def _check_pragma(self, version):\n        if version in self.BUGGY_VERSIONS:\n            return self.BUGGY_VERSION_TXT\n        versions = PATTERN.findall(version)\n        if len(versions) == 1:\n            version = versions[0]\n            return self._check_version(version)\n        elif len(versions) == 2:\n            version_left = versions[0]\n            version_right = versions[1]\n            # Only allow two elements if the second one is\n            # <0.5.0 or <0.6.0\n            if version_right not in [('<', '', '0', '5', '0'), ('<', '', '0', '6', '0')]:\n                return self.COMPLEX_PRAGMA_TXT\n            return self._check_version(version_left)\n        else:\n            return self.COMPLEX_PRAGMA_TXT\n    def _detect(self):\n        \"\"\"\n        Detects pragma statements that allow for outdated solc versions.\n        :return: Returns the relevant JSON data for the findings.\n        \"\"\"\n        # Detect all version related pragmas and check if they are disallowed.\n        results = []\n        pragma = self.slither.pragma_directives\n        disallowed_pragmas = []\n        detected_version = False\n        for p in pragma:\n            # Skip any pragma directives which do not refer to version\n            if len(p.directive) < 1 or p.directive[0] != \"solidity\":\n                continue\n\n            # This is version, so we test if this is disallowed.\n            detected_version = True\n            reason = self._check_pragma(p.version)\n            if reason:\n                disallowed_pragmas.append((reason, p))\n\n        # If we found any disallowed pragmas, we output our findings.\n        if disallowed_pragmas:\n            for (reason, p) in disallowed_pragmas:\n                info = f\"Pragma version \\\"{p.version}\\\" {reason} ({p.source_mapping_str})\\n\"\n\n                json = self.generate_json_result(info)\n                self.add_pragma_to_json(p, json)\n                results.append(json)\n\n        return results\n", "path": "slither/detectors/attributes/incorrect_solc.py"}]}