From 3d86b8acdab25399fc921ab6b522943a02bac410 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Esteban=20K=C3=BCber?= <esteban@kuber.com.ar>
Date: Fri, 30 Jun 2023 03:06:15 +0000
Subject: [PATCH] Add test for #56607

---
 tests/ui/sized/unsized-binding.rs     |  5 ++++
 tests/ui/sized/unsized-binding.stderr | 39 +++++++++++++++++++++++++++
 2 files changed, 44 insertions(+)
 create mode 100644 tests/ui/sized/unsized-binding.rs
 create mode 100644 tests/ui/sized/unsized-binding.stderr

diff --git a/tests/ui/sized/unsized-binding.rs b/tests/ui/sized/unsized-binding.rs
new file mode 100644
index 00000000000..7d410718612
--- /dev/null
+++ b/tests/ui/sized/unsized-binding.rs
@@ -0,0 +1,5 @@
+fn main() {
+    let x = *""; //~ ERROR E0277
+    println!("{}", x); //~ ERROR E0277
+    println!("{}", x); //~ ERROR E0277
+}
diff --git a/tests/ui/sized/unsized-binding.stderr b/tests/ui/sized/unsized-binding.stderr
new file mode 100644
index 00000000000..d508d84930a
--- /dev/null
+++ b/tests/ui/sized/unsized-binding.stderr
@@ -0,0 +1,39 @@
+error[E0277]: the size for values of type `str` cannot be known at compilation time
+  --> $DIR/unsized-binding.rs:2:9
+   |
+LL |     let x = *"";
+   |         ^ doesn't have a size known at compile-time
+   |
+   = help: the trait `Sized` is not implemented for `str`
+   = note: all local variables must have a statically known size
+   = help: unsized locals are gated as an unstable feature
+
+error[E0277]: the size for values of type `str` cannot be known at compilation time
+  --> $DIR/unsized-binding.rs:3:20
+   |
+LL |     println!("{}", x);
+   |               --   ^ doesn't have a size known at compile-time
+   |               |
+   |               required by a bound introduced by this call
+   |
+   = help: the trait `Sized` is not implemented for `str`
+note: required by a bound in `core::fmt::rt::Argument::<'a>::new_display`
+  --> $SRC_DIR/core/src/fmt/rt.rs:LL:COL
+   = note: this error originates in the macro `$crate::format_args_nl` which comes from the expansion of the macro `println` (in Nightly builds, run with -Z macro-backtrace for more info)
+
+error[E0277]: the size for values of type `str` cannot be known at compilation time
+  --> $DIR/unsized-binding.rs:4:20
+   |
+LL |     println!("{}", x);
+   |               --   ^ doesn't have a size known at compile-time
+   |               |
+   |               required by a bound introduced by this call
+   |
+   = help: the trait `Sized` is not implemented for `str`
+note: required by a bound in `core::fmt::rt::Argument::<'a>::new_display`
+  --> $SRC_DIR/core/src/fmt/rt.rs:LL:COL
+   = note: this error originates in the macro `$crate::format_args_nl` which comes from the expansion of the macro `println` (in Nightly builds, run with -Z macro-backtrace for more info)
+
+error: aborting due to 3 previous errors
+
+For more information about this error, try `rustc --explain E0277`.