commit e3512d887df41a8162c3e361171c04beca08415b
Author: Tom Stejskal <tom.stejskal@gmail.com>
Date:   Mon Nov 19 20:09:43 2018 +0100

    Fix Map.!: given key is not an element in the map

diff --git a/compiler/src/Elm/Compiler/Type/Extract.hs b/compiler/src/Elm/Compiler/Type/Extract.hs
index 1aafe1d4..99763392 100644
--- a/compiler/src/Elm/Compiler/Type/Extract.hs
+++ b/compiler/src/Elm/Compiler/Type/Extract.hs
@@ -10,6 +10,7 @@ module Elm.Compiler.Type.Extract
 
 
 import Data.Map ((!))
+import qualified Data.Map as Map
 import qualified Data.Maybe as Maybe
 import qualified Data.Set as Set
 
@@ -134,11 +135,15 @@ extractUnion interfaces (Opt.Global home name) =
     else
       let
         pname = toPublicName home name
-        unions = I._unions (interfaces ! home)
+        maybeUnions = I._unions <$> Map.lookup home interfaces
       in
-      case I.toUnionInternals (unions ! name) of
-        Can.Union vars ctors _ _ ->
-          T.Union pname vars <$> traverse extractCtor ctors
+      case Map.lookup name =<< maybeUnions of
+        Just union ->
+          case I.toUnionInternals union of
+            Can.Union vars ctors _ _ ->
+              T.Union pname vars <$> traverse extractCtor ctors
+        Nothing ->
+          return $ T.Union pname [] []
 
 
 extractCtor :: Can.Ctor -> Extractor (N.Name, [T.Type])
9464ca53ab66a92d1d223738227a23e8ad1b86b'>commit</a><a href='/guix/diff/nix/libstore/gc.cc?id=d9464ca53ab66a92d1d223738227a23e8ad1b86b'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/nix/libstore/gc.cc'>
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<div class='path'>path: <a href='/guix/log/?id=d9464ca53ab66a92d1d223738227a23e8ad1b86b'>root</a>/<a href='/guix/log/nix?id=d9464ca53ab66a92d1d223738227a23e8ad1b86b'>nix</a>/<a href='/guix/log/nix/libstore?id=d9464ca53ab66a92d1d223738227a23e8ad1b86b'>libstore</a>/<a href='/guix/log/nix/libstore/gc.cc?id=d9464ca53ab66a92d1d223738227a23e8ad1b86b'>gc.cc</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/nix/libstore/gc.cc?id=d9464ca53ab66a92d1d223738227a23e8ad1b86b&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2019-02-04 16:20:01 +0100'>2019-02-04</span></td><td><a href='/guix/commit/nix/libstore/gc.cc?id=959eaa1eb834fd47ceab3c5bbbe4967e808d530b'>daemon: Add "/guix" to default 'nixLibexecDir'.</a><span class='msg-avail'>...<span class='msg-tooltip'>This makes it easier to run the uninstalled daemon.

* nix/local.mk (libstore_a_CPPFLAGS): Append "/guix" to
NIX_LIBEXEC_DIR.
* build-aux/pre-inst-env.in (NIX_LIBEXEC_DIR): Adjust comment.
* nix/libstore/builtins.cc (builtinDownload): Remove SUBDIR and its
use.
* nix/libstore/local-store.cc (runAuthenticationProgram): Ditto.
* nix/libstore/gc.cc (addAdditionalRoots): Remove "/guix" prefix.
* nix/nix-daemon/guix-daemon.cc (main): Ditto.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-12-16 16:28:07 +0100'>2018-12-16</span></td><td><a href='/guix/commit/nix/libstore/gc.cc?id=8327e733966cc4a93dfaadd1a761ca1088078baa'>daemon: Use unbranded phrases in comments and messages.</a><span class='msg-avail'>...<span class='msg-tooltip'>* nix/libstore/build.cc, nix/libstore/globals.cc,
nix/libstore/gc.cc, nix/libstore/local-store.cc,
nix/libstore/optimise-store.cc, nix/libstore/store-api.cc,
nix/libutil/archive.cc, nix/nix-daemon/nix-daemon.cc: Replace "Nix
store" by "store", and "Nix daemon" by "build daemon".
</span></span></td><td>Ludovic Courtès</td></tr>