From 8e80ca6470f7bf776b07729c956ef5fdb3ae8a37 Mon Sep 17 00:00:00 2001
From: Takayuki Maeda <takoyaki0316@gmail.com>
Date: Thu, 25 Aug 2022 02:08:00 +0900
Subject: [PATCH] fix ICE #100948

---
 compiler/rustc_ast/src/util/literal.rs |  2 +-
 src/test/ui/issues/issue-100948.rs     |  5 +++++
 src/test/ui/issues/issue-100948.stderr | 10 ++++++++++
 src/test/ui/issues/issue-100948.stdout |  9 +++++++++
 4 files changed, 25 insertions(+), 1 deletion(-)
 create mode 100644 src/test/ui/issues/issue-100948.rs
 create mode 100644 src/test/ui/issues/issue-100948.stderr
 create mode 100644 src/test/ui/issues/issue-100948.stdout

diff --git a/compiler/rustc_ast/src/util/literal.rs b/compiler/rustc_ast/src/util/literal.rs
index 6a02a3b56f616..5e0f784b73469 100644
--- a/compiler/rustc_ast/src/util/literal.rs
+++ b/compiler/rustc_ast/src/util/literal.rs
@@ -199,7 +199,7 @@ impl LitKind {
                 let symbol = if value { kw::True } else { kw::False };
                 (token::Bool, symbol, None)
             }
-            LitKind::Err => unreachable!(),
+            LitKind::Err => (token::Err, kw::Empty, None),
         };
 
         token::Lit::new(kind, symbol, suffix)
diff --git a/src/test/ui/issues/issue-100948.rs b/src/test/ui/issues/issue-100948.rs
new file mode 100644
index 0000000000000..6dd69bf7030c8
--- /dev/null
+++ b/src/test/ui/issues/issue-100948.rs
@@ -0,0 +1,5 @@
+// compile-flags: -Zunpretty=hir
+
+fn main() {
+    1u; //~ ERROR invalid suffix `u` for number literal
+}
diff --git a/src/test/ui/issues/issue-100948.stderr b/src/test/ui/issues/issue-100948.stderr
new file mode 100644
index 0000000000000..b72ff9e1770a5
--- /dev/null
+++ b/src/test/ui/issues/issue-100948.stderr
@@ -0,0 +1,10 @@
+error: invalid suffix `u` for number literal
+  --> $DIR/issue-100948.rs:4:5
+   |
+LL |     1u;
+   |     ^^ invalid suffix `u`
+   |
+   = help: the suffix must be one of the numeric types (`u32`, `isize`, `f32`, etc.)
+
+error: aborting due to previous error
+
diff --git a/src/test/ui/issues/issue-100948.stdout b/src/test/ui/issues/issue-100948.stdout
new file mode 100644
index 0000000000000..97a367ea21253
--- /dev/null
+++ b/src/test/ui/issues/issue-100948.stdout
@@ -0,0 +1,9 @@
+#[prelude_import]
+use ::std::prelude::rust_2015::*;
+#[macro_use]
+extern crate std;
+// compile-flags: -Zunpretty=hir
+
+fn main() {
+        ;
+    }