3 files changed, 117 insertions, 0 deletions
diff --git a/html-test/ref/Threaded.html b/html-test/ref/Threaded.html
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--- /dev/null
+++ b/html-test/ref/Threaded.html
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+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml"
+><head
+  ><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"
+     /><title
+    >Threaded</title
+    ><link href="ocean.css" rel="stylesheet" type="text/css" title="Ocean"
+     /><script src="haddock-util.js" type="text/javascript"
+    ></script
+    ><script type="text/javascript"
+    >//<![CDATA[
+window.onload = function () {pageLoad();setSynopsis("mini_Threaded.html");};
+//]]>
+</script
+    ></head
+  ><body
+  ><div id="package-header"
+    ><ul class="links" id="page-menu"
+      ><li
+	><a href="index.html"
+	  >Contents</a
+	  ></li
+	><li
+	><a href="doc-index.html"
+	  >Index</a
+	  ></li
+	></ul
+      ><p class="caption empty"
+      >&nbsp;</p
+      ></div
+    ><div id="content"
+    ><div id="module-header"
+      ><table class="info"
+	><tr
+	  ><th
+	    >Safe Haskell</th
+	    ><td
+	    >None</td
+	    ></tr
+	  ></table
+	><p class="caption"
+	>Threaded</p
+	></div
+      ><div id="description"
+      ><p class="caption"
+	>Description</p
+	><div class="doc"
+	><p
+	  >Ensures haddock built with <code
+	    >-threaded</code
+	    >.</p
+	  ></div
+	></div
+      ><div id="synopsis"
+      ><p id="control.syn" class="caption expander" onclick="toggleSection('syn')"
+	>Synopsis</p
+	><ul id="section.syn" class="hide" onclick="toggleSection('syn')"
+	><li class="src short"
+	  ><a href="#v:f"
+	    >f</a
+	    > :: <a href=" ${pkgroot}/../../share/doc/ghc/html/libraries/base-4.8.0.0/Prelude.html#t:Integer"
+	    >Integer</a
+	    ></li
+	  ></ul
+	></div
+      ><div id="interface"
+      ><h1
+	>Documentation</h1
+	><div class="top"
+	><p class="src"
+	  ><a name="v:f" class="def"
+	    >f</a
+	    > :: <a href=" ${pkgroot}/../../share/doc/ghc/html/libraries/base-4.8.0.0/Prelude.html#t:Integer"
+	    >Integer</a
+	    ></p
+	  ><div class="doc"
+	  ><p
+	    ><code
+	      >$(forkTH)</code
+	      > fails at compile time if haddock isn't using the
+ threaded RTS.</p
+	    ></div
+	  ></div
+	></div
+      ></div
+    ><div id="footer"
+    ><p
+      >Produced by <a href="http://www.haskell.org/haddock/"
+	>Haddock</a
+	> version 2.16.0</p
+      ></div
+    ></body
+  ></html
+>
diff --git a/html-test/src/Threaded.hs b/html-test/src/Threaded.hs
new file mode 100644
index 00000000..7f3073ad
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+++ b/html-test/src/Threaded.hs
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+{-# LANGUAGE TemplateHaskell #-}
+
+-- | Ensures haddock built with @-threaded@.
+module Threaded where
+
+import Threaded_TH
+
+-- | @$(forkTH)@ fails at compile time if haddock isn't using the
+-- threaded RTS.
+f = $(forkTH)
diff --git a/html-test/src/Threaded_TH.hs b/html-test/src/Threaded_TH.hs
new file mode 100644
index 00000000..53e5a399
--- /dev/null
+++ b/html-test/src/Threaded_TH.hs
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+-- | Imported by 'Threaded', since a TH splice can't be used in the
+-- module where it is defined.
+module Threaded_TH where
+
+import Control.Concurrent (forkOS)
+import Language.Haskell.TH.Syntax (Exp (LitE), Lit (IntegerL), Q, runIO)
+
+-- | forkOS requires the threaded RTS, so this TH fails if haddock was
+-- built without @-threaded@.
+forkTH :: Q Exp
+forkTH = do
+  _ <- runIO (forkOS (return ()))
+  return (LitE (IntegerL 0))