diff -Nru rust-wasm-bindgen-backend-0.2.51/debian/changelog rust-wasm-bindgen-backend-0.2.51/debian/changelog
--- rust-wasm-bindgen-backend-0.2.51/debian/changelog	2019-10-05 07:21:02.000000000 +0000
+++ rust-wasm-bindgen-backend-0.2.51/debian/changelog	2019-11-29 12:24:27.000000000 +0000
@@ -1,3 +1,9 @@
+rust-wasm-bindgen-backend (0.2.51-1+rpi1) bullseye-staging; urgency=medium
+
+  * use "raw identifier" for await as suggested by error message.
+
+ -- Peter Michael Green <plugwash@raspbian.org>  Fri, 29 Nov 2019 12:24:27 +0000
+
 rust-wasm-bindgen-backend (0.2.51-1) unstable; urgency=medium
 
   * Package wasm-bindgen-backend 0.2.51 from crates.io using debcargo 2.4.0
diff -Nru rust-wasm-bindgen-backend-0.2.51/debian/patches/series rust-wasm-bindgen-backend-0.2.51/debian/patches/series
--- rust-wasm-bindgen-backend-0.2.51/debian/patches/series	1970-01-01 00:00:00.000000000 +0000
+++ rust-wasm-bindgen-backend-0.2.51/debian/patches/series	2019-11-29 12:24:27.000000000 +0000
@@ -0,0 +1 @@
+use-raw-identifier-for-await.patch
diff -Nru rust-wasm-bindgen-backend-0.2.51/debian/patches/use-raw-identifier-for-await.patch rust-wasm-bindgen-backend-0.2.51/debian/patches/use-raw-identifier-for-await.patch
--- rust-wasm-bindgen-backend-0.2.51/debian/patches/use-raw-identifier-for-await.patch	1970-01-01 00:00:00.000000000 +0000
+++ rust-wasm-bindgen-backend-0.2.51/debian/patches/use-raw-identifier-for-await.patch	2019-11-29 12:24:27.000000000 +0000
@@ -0,0 +1,27 @@
+Description:  use "raw identifier" for await as suggested by error message.
+Author: Peter Michael Green <plugwash@raspbian.org>
+
+---
+The information above should follow the Patch Tagging Guidelines, please
+checkout http://dep.debian.net/deps/dep3/ to learn about the format. Here
+are templates for supplementary fields that you might want to add:
+
+Origin: <vendor|upstream|other>, <url of original patch>
+Bug: <url in upstream bugtracker>
+Bug-Debian: https://bugs.debian.org/<bugnumber>
+Bug-Ubuntu: https://launchpad.net/bugs/<bugnumber>
+Forwarded: <no|not-needed|url proving that it has been forwarded>
+Reviewed-By: <name and email of someone who approved the patch>
+Last-Update: 2019-11-29
+
+--- rust-wasm-bindgen-backend-0.2.51.orig/src/codegen.rs
++++ rust-wasm-bindgen-backend-0.2.51/src/codegen.rs
+@@ -451,7 +451,7 @@ impl TryToTokens for ast::Export {
+                 quote! { wasm_bindgen::JsValue },
+                 quote! {
+                     wasm_bindgen_futures::future_to_promise(async {
+-                        wasm_bindgen::__rt::IntoJsResult::into_js_result(#ret.await)
++                        wasm_bindgen::__rt::IntoJsResult::into_js_result(#ret.r#await)
+                     }).into()
+                 },
+             )