From 47364f64efa2242df2d1b16a0aa264ff64fd4a53 Mon Sep 17 00:00:00 2001
From: Oliver Scherer <github35764891676564198441@oli-obk.de>
Date: Mon, 22 Oct 2018 19:15:25 +0200
Subject: [PATCH] Add a workaround for a rustc ICE

---
 components/script/build.rs | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/components/script/build.rs b/components/script/build.rs
index d801137c59c..6bce87d65b5 100644
--- a/components/script/build.rs
+++ b/components/script/build.rs
@@ -79,9 +79,10 @@ struct Bytes<'a>(&'a str);
 
 impl<'a> fmt::Debug for Bytes<'a> {
     fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
-        formatter.write_str("b\"")?;
-        formatter.write_str(self.0)?;
-        formatter.write_str("\" as &'static [u8]")
+        // https://github.com/rust-lang/rust/issues/55223
+        // should technically be just `write!(formatter, "b\"{}\"", self.0)
+        // but the referenced issue breaks promotion in the surrounding code
+        write!(formatter, "{{ const FOO: &[u8] = b\"{}\"; FOO }}", self.0)
     }
 }