Handle multiline strings with '# noqa'

In Flake8 2.x we allowed people to use # noqa at the end of a multiline
string to ignore errors inside the string (e.g., E501). Being blissfully
ignorant of this, I never accounted for it in Flake8 3. This fixes the
oversight and allows multiline statements to have the # noqa at the end.

Closes #177

docs/source/release-notes/3.0.1.rst

@@ -0,0 +1,10 @@
+3.0.1 -- 2016-07-25
+-------------------
+
+- Fix regression in handling of ``# noqa`` for multiline strings.
+  (See also `GitLab#177`_)
+
+
+.. links
+.. _GitLab#177:
+    https://gitlab.com/pycqa/flake8/issues/177

docs/source/release-notes/index.rst

@@ -6,6 +6,7 @@ All of the release notes that have been recorded for Flake8 are organized here
 with the newest releases first.
 
 .. toctree::
+    3.0.1
     3.0.0
     2.6.2
     2.6.1

src/flake8/__init__.py

@@ -27,7 +27,7 @@ LOG.addHandler(NullHandler())
 # Clean up after LOG config
 del NullHandler
 
-__version__ = '3.0.0'
+__version__ = '3.0.1'
 __version_info__ = tuple(int(i) for i in __version__.split('.') if i.isdigit())
 
 

src/flake8/checker.py

@@ -425,16 +425,16 @@ class FileChecker(object):
             self.report('E902', 0, 0, message)
             return None
 
-    def report(self, error_code, line_number, column, text):
+    def report(self, error_code, line_number, column, text, line=None):
         # type: (str, int, int, str) -> str
         """Report an error by storing it in the results list."""
         if error_code is None:
             error_code, text = text.split(' ', 1)
 
-        physical_line = ''
+        physical_line = line
         # If we're recovering from a problem in _make_processor, we will not
         # have this attribute.
-        if getattr(self, 'processor', None):
+        if not physical_line and getattr(self, 'processor', None):
             physical_line = self.processor.line_for(line_number)
 
         error = (error_code, line_number, column, text, physical_line)
@@ -504,7 +504,7 @@ class FileChecker(object):
 
         self.processor.next_logical_line()
 
-    def run_physical_checks(self, physical_line):
+    def run_physical_checks(self, physical_line, override_error_line=None):
         """Run all checks for a given physical line."""
         for plugin in self.checks.physical_line_plugins:
             self.processor.update_checker_state_for(plugin)
@@ -516,6 +516,7 @@ class FileChecker(object):
                     line_number=self.processor.line_number,
                     column=column_offset,
                     text=text,
+                    line=(override_error_line or physical_line),
                 )
 
                 self.processor.check_physical_error(error_code, physical_line)
@@ -611,7 +612,8 @@ class FileChecker(object):
             line_no = token[2][0]
             with self.processor.inside_multiline(line_number=line_no):
                 for line in self.processor.split_line(token):
-                    self.run_physical_checks(line + '\n')
+                    self.run_physical_checks(line + '\n',
+                                             override_error_line=token[4])
 
 
 def find_offset(offset, mapping):