Use the correct current element when computing the type of function elements.

lib/compiler/implementation/elements/elements.dart

Index: lib/compiler/implementation/elements/elements.dart
diff --git a/lib/compiler/implementation/elements/elements.dart b/lib/compiler/implementation/elements/elements.dart
index 498bad83e06c16d1248ffdd84ac9eacf253d3d01..91106d17eaf7fb39e192d2b2164ecc37173376fd 100644
--- a/lib/compiler/implementation/elements/elements.dart
+++ b/lib/compiler/implementation/elements/elements.dart
@@ -619,21 +619,23 @@ class FunctionElement extends Element {
 
   FunctionType computeType(Compiler compiler) {
     if (type != null) return type;
-    FunctionParameters parameters = computeParameters(compiler);
-    Types types = compiler.types;
-    FunctionExpression node =
-        compiler.parser.measure(() => parseNode(compiler));
-    Type returnType = getType(node.returnType, compiler, getLibrary());
-    if (returnType === null) returnType = types.dynamicType;
-
-    LinkBuilder<Type> parameterTypes = new LinkBuilder<Type>();
-    for (Link<Element> link = parameters.requiredParameters;
-         !link.isEmpty();
-         link = link.tail) {
-      parameterTypes.addLast(link.head.computeType(compiler));
-    }
-    type = new FunctionType(returnType, parameterTypes.toLink(), this);
-    return type;
+    return compiler.withCurrentElement(this, () {

[kasperl, 2012/04/23 11:45:45]

Would it be possible to add a regression test case for this? How involved is it?

+      FunctionParameters parameters = computeParameters(compiler);
+      Types types = compiler.types;
+      FunctionExpression node =
+          compiler.parser.measure(() => parseNode(compiler));
+      Type returnType = getType(node.returnType, compiler, getLibrary());
+      if (returnType === null) returnType = types.dynamicType;
+
+      LinkBuilder<Type> parameterTypes = new LinkBuilder<Type>();
+      for (Link<Element> link = parameters.requiredParameters;
+           !link.isEmpty();
+           link = link.tail) {
+        parameterTypes.addLast(link.head.computeType(compiler));
+      }
+      type = new FunctionType(returnType, parameterTypes.toLink(), this);
+      return type;
+    });
   }
 
   Node parseNode(DiagnosticListener listener) => cachedNode;