Fix parsing of interpolated paths

src/libsyntax/parse/parser.rs

@@ -566,7 +566,8 @@ impl Parser {
             self.parse_borrowed_pointee()
         } else if self.token_is_fn_keyword(self.token) {
             self.parse_ty_fn(None, None)
-        } else if self.token == token::MOD_SEP || is_ident(self.token) {
+        } else if self.token == token::MOD_SEP
+            || is_ident_or_path(self.token) {
             let path = self.parse_path_with_tps(colons_before_params);
             ty_path(path, self.get_id())
         } else { self.fatal(~"expected type"); };

src/test/run-pass/macro-path.rs

@@ -0,0 +1,16 @@
+mod m {
+    pub type t = int;
+}
+
+fn macros() {
+    macro_rules! foo {
+        ($p:path) => {
+            fn f() -> $p { 10 }
+            f()
+        }
+    }
+}
+
+fn main() {
+    assert foo!(m::t) == 10;
+}