From e77e006f51a977ff7f0bd2ee569a58f075cdcc88 Mon Sep 17 00:00:00 2001
From: nojaf <florian.verdonck@outlook.com>
Date: Sat, 12 Oct 2019 11:31:31 +0200
Subject: [PATCH] Fix for #505

---
 src/Fantomas.Tests/ModuleTests.fs | 17 +++++++++++++++++
 src/Fantomas/CodePrinter.fs       |  3 ++-
 2 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/src/Fantomas.Tests/ModuleTests.fs b/src/Fantomas.Tests/ModuleTests.fs
index c63d5d311d..74260f32d7 100644
--- a/src/Fantomas.Tests/ModuleTests.fs
+++ b/src/Fantomas.Tests/ModuleTests.fs
@@ -328,4 +328,21 @@ type T() =
 type T() =
     interface IDisposable with
         override x.Dispose() = ()
+"""
+
+[<Test>]
+let ``attribute on module after namespace`` () =
+    formatSourceString false """namespace SomeNamespace
+
+[<AutoOpen>]
+module Types =
+    let a = 5
+"""  config
+    |> prepend newline
+    |> should equal """
+namespace SomeNamespace
+
+[<AutoOpen>]
+module Types =
+    let a = 5
 """
\ No newline at end of file
diff --git a/src/Fantomas/CodePrinter.fs b/src/Fantomas/CodePrinter.fs
index 2d017d028d..2108662e5a 100644
--- a/src/Fantomas/CodePrinter.fs
+++ b/src/Fantomas/CodePrinter.fs
@@ -113,7 +113,8 @@ and genModuleOrNamespace astContext (ModuleOrNamespace(ats, px, ao, s, mds, isRe
         match firstDecl with
         | None -> rep 2 sepNln
         | Some mdl ->
-            sepNlnConsideringTriviaContentBefore mdl.Range +> sepNln
+            let attrRanges = getRangesFromAttributesFromModuleDeclaration mdl
+            sepNlnConsideringTriviaContentBeforeWithAttributes mdl.Range attrRanges +> sepNln
 
     let genTriviaForLongIdent (f: Context -> Context) =
         match node with