From 55b9aac25e9527badd5ae7139be8ba08dfa7e58f Mon Sep 17 00:00:00 2001
From: Timothy Crosley <timothy.crosley@gmail.com>
Date: Sun, 5 Jan 2020 04:05:35 -0800
Subject: Fix issue #1065, multiple noqa comments

---
 isort/comments.py   |  6 +++++-
 isort/parse.py      |  3 ++-
 tests/test_isort.py | 37 +++++++++++++++++++++++++++++++++----
 3 files changed, 40 insertions(+), 6 deletions(-)

diff --git a/isort/comments.py b/isort/comments.py
index d033804d..b865b328 100644
--- a/isort/comments.py
+++ b/isort/comments.py
@@ -25,4 +25,8 @@ def add_to_line(
     if not comments:
         return original_string
     else:
-        return f"{parse(original_string)[0]}{comment_prefix} {'; '.join(comments)}"
+        unique_comments: List[str] = []
+        for comment in comments:
+            if comment not in unique_comments:
+                unique_comments.append(comment)
+        return f"{parse(original_string)[0]}{comment_prefix} {'; '.join(unique_comments)}"
diff --git a/isort/parse.py b/isort/parse.py
index 92bb46b5..8172808d 100644
--- a/isort/parse.py
+++ b/isort/parse.py
@@ -332,7 +332,8 @@ def file_contents(contents: str, config: Config = DEFAULT_CONFIG) -> ParsedConte
                         categorized_comments["nested"].setdefault(import_from, {})[
                             import_name
                         ] = associated_comment
-                        comments.pop(comments.index(associated_comment))
+                        if associated_comment in comments:
+                            comments.pop(comments.index(associated_comment))
                 if comments:
                     categorized_comments["from"].setdefault(import_from, []).extend(comments)
 
diff --git a/tests/test_isort.py b/tests/test_isort.py
index 0bed7f49..db982587 100644
--- a/tests/test_isort.py
+++ b/tests/test_isort.py
@@ -964,8 +964,7 @@ def test_force_single_line_imports() -> None:
     )
 
     test_input = (
-        "from third_party import lib_a, lib_b, lib_d\n"
-        "from third_party.lib_c import lib1\n"
+        "from third_party import lib_a, lib_b, lib_d\n" "from third_party.lib_c import lib1\n"
     )
     test_output = SortImports(
         file_contents=test_input,
@@ -4617,9 +4616,39 @@ IF CEF_VERSION == 3:
 
 
 def test_top_level_import_order() -> None:
-    config = {"force_sort_within_sections": 1}  # type: Dict[str, Any]
     test_input = (
         "from rest_framework import throttling, viewsets\n"
         "from rest_framework.authentication import TokenAuthentication\n"
     )
-    assert SortImports(file_contents=test_input, **config).output == test_input
+    assert (
+        SortImports(file_contents=test_input, force_sort_within_sections=True).output == test_input
+    )
+
+
+def test_noqa_issue_1065() -> None:
+    test_input = """
+#
+# USER SIGNALS
+#
+
+from flask_login import user_logged_in, user_logged_out  # noqa
+
+from flask_security.signals import (  # noqa
+    password_changed as user_reset_password,  # noqa
+    user_confirmed,  # noqa
+    user_registered,  # noqa
+)  # noqa
+
+from flask_principal import identity_changed as user_identity_changed  # noqa
+"""
+    expected_output = """
+#
+# USER SIGNALS
+#
+from flask_login import user_logged_in, user_logged_out  # noqa
+from flask_principal import identity_changed as user_identity_changed  # noqa
+from flask_security.signals import password_changed as user_reset_password  # noqa
+from flask_security.signals import user_confirmed  # noqa
+from flask_security.signals import user_registered  # noqa
+"""
+    assert SortImports(file_contents=test_input).output == expected_output
-- 
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