1 files changed, 9 insertions, 9 deletions
diff --git a/src/libsyntax_ext/proc_macro_harness.rs b/src/libsyntax_ext/proc_macro_harness.rs
index 7913a7442ed..e772eaf8349 100644
--- a/src/libsyntax_ext/proc_macro_harness.rs
+++ b/src/libsyntax_ext/proc_macro_harness.rs
@@ -1,18 +1,16 @@
 use std::mem;
 
+use smallvec::smallvec;
 use syntax::ast::{self, Ident};
 use syntax::attr;
-use syntax::source_map::{ExpnInfo, ExpnKind, respan};
+use syntax::source_map::{ExpnData, ExpnKind, respan};
 use syntax::ext::base::{ExtCtxt, MacroKind};
-use syntax::ext::expand::ExpansionConfig;
-use syntax::ext::hygiene::ExpnId;
+use syntax::ext::expand::{AstFragment, ExpansionConfig};
 use syntax::ext::proc_macro::is_proc_macro_attr;
-use syntax::mut_visit::MutVisitor;
 use syntax::parse::ParseSess;
 use syntax::ptr::P;
 use syntax::symbol::{kw, sym};
 use syntax::visit::{self, Visitor};
-
 use syntax_pos::{Span, DUMMY_SP};
 
 struct ProcMacroDerive {
@@ -329,7 +327,7 @@ fn mk_decls(
     custom_attrs: &[ProcMacroDef],
     custom_macros: &[ProcMacroDef],
 ) -> P<ast::Item> {
-    let span = DUMMY_SP.fresh_expansion(ExpnId::root(), ExpnInfo::allow_unstable(
+    let span = DUMMY_SP.fresh_expansion(ExpnData::allow_unstable(
         ExpnKind::Macro(MacroKind::Attr, sym::proc_macro), DUMMY_SP, cx.parse_sess.edition,
         [sym::rustc_attrs, sym::proc_macro_internals][..].into(),
     ));
@@ -338,7 +336,7 @@ fn mk_decls(
     let doc = cx.meta_list(span, sym::doc, vec![hidden]);
     let doc_hidden = cx.attribute(doc);
 
-    let proc_macro = Ident::with_empty_ctxt(sym::proc_macro);
+    let proc_macro = Ident::with_dummy_span(sym::proc_macro);
     let krate = cx.item(span,
                         proc_macro,
                         Vec::new(),
@@ -350,7 +348,7 @@ fn mk_decls(
     let custom_derive = Ident::from_str("custom_derive");
     let attr = Ident::from_str("attr");
     let bang = Ident::from_str("bang");
-    let crate_kw = Ident::with_empty_ctxt(kw::Crate);
+    let crate_kw = Ident::with_dummy_span(kw::Crate);
 
     let decls = {
         let local_path = |sp: Span, name| {
@@ -409,5 +407,7 @@ fn mk_decls(
         i
     });
 
-    cx.monotonic_expander().flat_map_item(module).pop().unwrap()
+    // Integrate the new module into existing module structures.
+    let module = AstFragment::Items(smallvec![module]);
+    cx.monotonic_expander().fully_expand_fragment(module).make_items().pop().unwrap()
 }