Produce expansion info for more builtin macros

4 files changed, 4 insertions, 1 deletions

diff --git a/src/libsyntax_ext/cfg.rs b/src/libsyntax_ext/cfg.rs
index 98da49545f9..1d8dc406468 100644
--- a/src/libsyntax_ext/cfg.rs
+++ b/src/libsyntax_ext/cfg.rs
@@ -24,6 +24,7 @@ pub fn expand_cfg<'cx>(cx: &mut ExtCtxt,
                        sp: Span,
                        tts: &[tokenstream::TokenTree])
                        -> Box<base::MacResult + 'static> {
+    let sp = sp.with_ctxt(sp.ctxt().apply_mark(cx.current_expansion.mark));
     let mut p = cx.new_parser_from_tts(tts);
     let cfg = panictry!(p.parse_meta_item());
 
diff --git a/src/libsyntax_ext/concat.rs b/src/libsyntax_ext/concat.rs
index bfe18dc4060..c79e7867c5f 100644
--- a/src/libsyntax_ext/concat.rs
+++ b/src/libsyntax_ext/concat.rs
@@ -57,5 +57,6 @@ pub fn expand_syntax_ext(cx: &mut base::ExtCtxt,
             }
         }
     }
+    let sp = sp.with_ctxt(sp.ctxt().apply_mark(cx.current_expansion.mark));
     base::MacEager::expr(cx.expr_str(sp, Symbol::intern(&accumulator)))
 }
diff --git a/src/libsyntax_ext/concat_idents.rs b/src/libsyntax_ext/concat_idents.rs
index 6f4c112acb6..8d0104e512b 100644
--- a/src/libsyntax_ext/concat_idents.rs
+++ b/src/libsyntax_ext/concat_idents.rs
@@ -92,6 +92,6 @@ pub fn expand_syntax_ext<'cx>(cx: &'cx mut ExtCtxt,
 
     Box::new(Result {
         ident: res,
-        span: sp,
+        span: sp.with_ctxt(sp.ctxt().apply_mark(cx.current_expansion.mark)),
     })
 }
diff --git a/src/libsyntax_ext/env.rs b/src/libsyntax_ext/env.rs
index affebbabbbd..fcad065be52 100644
--- a/src/libsyntax_ext/env.rs
+++ b/src/libsyntax_ext/env.rs
@@ -32,6 +32,7 @@ pub fn expand_option_env<'cx>(cx: &'cx mut ExtCtxt,
         Some(v) => v,
     };
 
+    let sp = sp.with_ctxt(sp.ctxt().apply_mark(cx.current_expansion.mark));
     let e = match env::var(&*var.as_str()) {
         Err(..) => {
             cx.expr_path(cx.path_all(sp,