prompt: We are currently solving the following issue within our repository. Here is the issue text:
  --- BEGIN ISSUE ---
  Some Errors cannot render their exceptions during the creation of portal
  This is a follow-up for #2203.
  
  A exception of the following type cannot rendered in Plone 5.2:
  
  ```
  ValueError
  
  Traceback (innermost last):
  
      Module ZServer.ZPublisher.Publish, line 144, in publish
      Module ZPublisher.mapply, line 85, in mapply
      Module Products.PDBDebugMode.runcall, line 68, in pdb_runcall
      Module ZServer.ZPublisher.Publish, line 44, in call_object
      Module Products.CMFPlone.browser.admin, line 271, in __call__
      Module Products.CMFPlone.factory, line 146, in addPloneSite
      Module Products.GenericSetup.tool, line 388, in runAllImportStepsFromProfile
      __traceback_info__: profile-Products.CMFPlone:plone
      Module Products.GenericSetup.tool, line 1433, in _runImportStepsFromContext
      Module Products.GenericSetup.tool, line 1245, in _doRunImportStep
      __traceback_info__: rolemap
      Module Products.GenericSetup.rolemap, line 102, in importRolemap
      Module <string>, line 8, in manage_permission
      Module AccessControl.requestmethod, line 79, in _curried
      Module OFS.role, line 86, in manage_permission
      Module AccessControl.rolemanager, line 224, in manage_permission
  
  ValueError: The permission <em>Use Database Methods</em> is invalid. 
  ```
  
  The issue is that the portal and the main_template exist during rendering of ExceptionView but the main_template cannot be rendered because the context of the exception is not the Plone site but the Application. Thus the exception-template cannot be rendered properly. To fix that i suggest we try to render main_template and switch to the basic_template when that fails.
  
  --- END ISSUE ---
  
  Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
  --- BEGIN FILES ---
  Path: `Products/CMFPlone/browser/exceptions.py`
  Content:
  ```
  1 # -*- coding: utf-8 -*-
  2 from AccessControl import getSecurityManager
  3 from Products.Five import BrowserView
  4 from Products.Five.browser.pagetemplatefile import ViewPageTemplateFile
  5 from zExceptions.ExceptionFormatter import format_exception
  6 from zope.component.hooks import getSite
  7 
  8 import json
  9 import sys
  10 
  11 
  12 class ExceptionView(BrowserView):
  13     basic_template = ViewPageTemplateFile('templates/basic_error_message.pt')
  14 
  15     def is_manager(self):
  16         return getSecurityManager().checkPermission(
  17             'Manage portal', self.context)
  18 
  19     def __call__(self):
  20         exception = self.context
  21         self.context = self.__parent__
  22         request = self.request
  23 
  24         error_type = exception.__class__.__name__
  25         exc_type, value, traceback = sys.exc_info()
  26         error_tb = ''.join(
  27             format_exception(exc_type, value, traceback, as_html=True))
  28         request.response.setStatus(exc_type)
  29 
  30         # Indicate exception as JSON
  31         if "text/html" not in request.getHeader('Accept', ''):
  32             request.response.setHeader("Content-Type", "application/json")
  33             return json.dumps({
  34                 'error_type': error_type,
  35             })
  36 
  37         if getSite() is None:
  38             # We cannot get the site, so we cannot render our nice template
  39             template = self.basic_template
  40         else:
  41             # Use a simplified template if main_template is not available
  42             try:
  43                 self.context.unrestrictedTraverse('main_template')
  44             except:
  45                 template = self.basic_template
  46             else:
  47                 template = self.index
  48 
  49         # Render page with user-facing error notice
  50         request.set('disable_border', True)
  51         request.set('disable_plone.leftcolumn', True)
  52         request.set('disable_plone.rightcolumn', True)
  53 
  54         return template(
  55             error_type=error_type,
  56             error_tb=error_tb,
  57         )
  58
  ```
  --- 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/Products/CMFPlone/browser/exceptions.py b/Products/CMFPlone/browser/exceptions.py
  --- a/Products/CMFPlone/browser/exceptions.py
  +++ b/Products/CMFPlone/browser/exceptions.py
  @@ -3,7 +3,6 @@
   from Products.Five import BrowserView
   from Products.Five.browser.pagetemplatefile import ViewPageTemplateFile
   from zExceptions.ExceptionFormatter import format_exception
  -from zope.component.hooks import getSite
   
   import json
   import sys
  @@ -34,24 +33,16 @@
                   'error_type': error_type,
               })
   
  -        if getSite() is None:
  -            # We cannot get the site, so we cannot render our nice template
  -            template = self.basic_template
  -        else:
  -            # Use a simplified template if main_template is not available
  -            try:
  -                self.context.unrestrictedTraverse('main_template')
  -            except:
  -                template = self.basic_template
  -            else:
  -                template = self.index
  -
           # Render page with user-facing error notice
           request.set('disable_border', True)
           request.set('disable_plone.leftcolumn', True)
           request.set('disable_plone.rightcolumn', True)
   
  -        return template(
  -            error_type=error_type,
  -            error_tb=error_tb,
  -        )
  +        try:
  +            return self.index(
  +                error_type=error_type,
  +                error_tb=error_tb)
  +        except:
  +            return self.basic_template(
  +                error_type=error_type,
  +                error_tb=error_tb)
  
verification_info: {"golden_diff": "diff --git a/Products/CMFPlone/browser/exceptions.py b/Products/CMFPlone/browser/exceptions.py\n--- a/Products/CMFPlone/browser/exceptions.py\n+++ b/Products/CMFPlone/browser/exceptions.py\n@@ -3,7 +3,6 @@\n from Products.Five import BrowserView\n from Products.Five.browser.pagetemplatefile import ViewPageTemplateFile\n from zExceptions.ExceptionFormatter import format_exception\n-from zope.component.hooks import getSite\n \n import json\n import sys\n@@ -34,24 +33,16 @@\n                 'error_type': error_type,\n             })\n \n-        if getSite() is None:\n-            # We cannot get the site, so we cannot render our nice template\n-            template = self.basic_template\n-        else:\n-            # Use a simplified template if main_template is not available\n-            try:\n-                self.context.unrestrictedTraverse('main_template')\n-            except:\n-                template = self.basic_template\n-            else:\n-                template = self.index\n-\n         # Render page with user-facing error notice\n         request.set('disable_border', True)\n         request.set('disable_plone.leftcolumn', True)\n         request.set('disable_plone.rightcolumn', True)\n \n-        return template(\n-            error_type=error_type,\n-            error_tb=error_tb,\n-        )\n+        try:\n+            return self.index(\n+                error_type=error_type,\n+                error_tb=error_tb)\n+        except:\n+            return self.basic_template(\n+                error_type=error_type,\n+                error_tb=error_tb)\n", "issue": "Some Errors cannot render their exceptions during the creation of portal\nThis is a follow-up for #2203.\r\n\r\nA exception of the following type cannot rendered in Plone 5.2:\r\n\r\n```\r\nValueError\r\n\r\nTraceback (innermost last):\r\n\r\n    Module ZServer.ZPublisher.Publish, line 144, in publish\r\n    Module ZPublisher.mapply, line 85, in mapply\r\n    Module Products.PDBDebugMode.runcall, line 68, in pdb_runcall\r\n    Module ZServer.ZPublisher.Publish, line 44, in call_object\r\n    Module Products.CMFPlone.browser.admin, line 271, in __call__\r\n    Module Products.CMFPlone.factory, line 146, in addPloneSite\r\n    Module Products.GenericSetup.tool, line 388, in runAllImportStepsFromProfile\r\n    __traceback_info__: profile-Products.CMFPlone:plone\r\n    Module Products.GenericSetup.tool, line 1433, in _runImportStepsFromContext\r\n    Module Products.GenericSetup.tool, line 1245, in _doRunImportStep\r\n    __traceback_info__: rolemap\r\n    Module Products.GenericSetup.rolemap, line 102, in importRolemap\r\n    Module <string>, line 8, in manage_permission\r\n    Module AccessControl.requestmethod, line 79, in _curried\r\n    Module OFS.role, line 86, in manage_permission\r\n    Module AccessControl.rolemanager, line 224, in manage_permission\r\n\r\nValueError: The permission <em>Use Database Methods</em> is invalid. \r\n```\r\n\r\nThe issue is that the portal and the main_template exist during rendering of ExceptionView but the main_template cannot be rendered because the context of the exception is not the Plone site but the Application. Thus the exception-template cannot be rendered properly. To fix that i suggest we try to render main_template and switch to the basic_template when that fails.\n", "before_files": [{"content": "# -*- coding: utf-8 -*-\nfrom AccessControl import getSecurityManager\nfrom Products.Five import BrowserView\nfrom Products.Five.browser.pagetemplatefile import ViewPageTemplateFile\nfrom zExceptions.ExceptionFormatter import format_exception\nfrom zope.component.hooks import getSite\n\nimport json\nimport sys\n\n\nclass ExceptionView(BrowserView):\n    basic_template = ViewPageTemplateFile('templates/basic_error_message.pt')\n\n    def is_manager(self):\n        return getSecurityManager().checkPermission(\n            'Manage portal', self.context)\n\n    def __call__(self):\n        exception = self.context\n        self.context = self.__parent__\n        request = self.request\n\n        error_type = exception.__class__.__name__\n        exc_type, value, traceback = sys.exc_info()\n        error_tb = ''.join(\n            format_exception(exc_type, value, traceback, as_html=True))\n        request.response.setStatus(exc_type)\n\n        # Indicate exception as JSON\n        if \"text/html\" not in request.getHeader('Accept', ''):\n            request.response.setHeader(\"Content-Type\", \"application/json\")\n            return json.dumps({\n                'error_type': error_type,\n            })\n\n        if getSite() is None:\n            # We cannot get the site, so we cannot render our nice template\n            template = self.basic_template\n        else:\n            # Use a simplified template if main_template is not available\n            try:\n                self.context.unrestrictedTraverse('main_template')\n            except:\n                template = self.basic_template\n            else:\n                template = self.index\n\n        # Render page with user-facing error notice\n        request.set('disable_border', True)\n        request.set('disable_plone.leftcolumn', True)\n        request.set('disable_plone.rightcolumn', True)\n\n        return template(\n            error_type=error_type,\n            error_tb=error_tb,\n        )\n", "path": "Products/CMFPlone/browser/exceptions.py"}], "after_files": [{"content": "# -*- coding: utf-8 -*-\nfrom AccessControl import getSecurityManager\nfrom Products.Five import BrowserView\nfrom Products.Five.browser.pagetemplatefile import ViewPageTemplateFile\nfrom zExceptions.ExceptionFormatter import format_exception\n\nimport json\nimport sys\n\n\nclass ExceptionView(BrowserView):\n    basic_template = ViewPageTemplateFile('templates/basic_error_message.pt')\n\n    def is_manager(self):\n        return getSecurityManager().checkPermission(\n            'Manage portal', self.context)\n\n    def __call__(self):\n        exception = self.context\n        self.context = self.__parent__\n        request = self.request\n\n        error_type = exception.__class__.__name__\n        exc_type, value, traceback = sys.exc_info()\n        error_tb = ''.join(\n            format_exception(exc_type, value, traceback, as_html=True))\n        request.response.setStatus(exc_type)\n\n        # Indicate exception as JSON\n        if \"text/html\" not in request.getHeader('Accept', ''):\n            request.response.setHeader(\"Content-Type\", \"application/json\")\n            return json.dumps({\n                'error_type': error_type,\n            })\n\n        # Render page with user-facing error notice\n        request.set('disable_border', True)\n        request.set('disable_plone.leftcolumn', True)\n        request.set('disable_plone.rightcolumn', True)\n\n        try:\n            return self.index(\n                error_type=error_type,\n                error_tb=error_tb)\n        except:\n            return self.basic_template(\n                error_type=error_type,\n                error_tb=error_tb)\n", "path": "Products/CMFPlone/browser/exceptions.py"}]}