Add `delay_span_bug` to `AttrWrapper::take_for_recovery`

1 files changed, 9 insertions, 3 deletions

diff --git a/compiler/rustc_parse/src/parser/attr_wrapper.rs b/compiler/rustc_parse/src/parser/attr_wrapper.rs
index 1b16ecb5ec2..c8160548763 100644
--- a/compiler/rustc_parse/src/parser/attr_wrapper.rs
+++ b/compiler/rustc_parse/src/parser/attr_wrapper.rs
@@ -5,7 +5,8 @@ use rustc_ast::tokenstream::{AttrTokenTree, DelimSpan, LazyAttrTokenStream, Spac
 use rustc_ast::{self as ast};
 use rustc_ast::{AttrVec, Attribute, HasAttrs, HasTokens};
 use rustc_errors::PResult;
-use rustc_span::{sym, Span};
+use rustc_session::parse::ParseSess;
+use rustc_span::{sym, Span, DUMMY_SP};
 
 use std::convert::TryInto;
 use std::ops::Range;
@@ -39,8 +40,13 @@ impl AttrWrapper {
     pub fn empty() -> AttrWrapper {
         AttrWrapper { attrs: AttrVec::new(), start_pos: usize::MAX }
     }
-    // FIXME: Delay span bug here?
-    pub(crate) fn take_for_recovery(self) -> AttrVec {
+
+    pub(crate) fn take_for_recovery(self, sess: &ParseSess) -> AttrVec {
+        sess.span_diagnostic.delay_span_bug(
+            self.attrs.get(0).map(|attr| attr.span).unwrap_or(DUMMY_SP),
+            "AttrVec is taken for recovery but no error is produced",
+        );
+
         self.attrs
     }