Add UI test for panic/assert in Rust 2021.

2 files changed, 51 insertions, 0 deletions

diff --git a/src/test/ui/panics/panic-2021.rs b/src/test/ui/panics/panic-2021.rs
new file mode 100644
index 00000000000..e606612e108
--- /dev/null
+++ b/src/test/ui/panics/panic-2021.rs
@@ -0,0 +1,9 @@
+// edition:2021
+
+fn main() {
+    panic!(123); //~ ERROR: format argument must be a string literal
+    panic!("{}"); //~ ERROR: 1 positional argument in format string
+    core::panic!("{}"); //~ ERROR: 1 positional argument in format string
+    assert!(false, 123); //~ ERROR: format argument must be a string literal
+    assert!(false, "{}"); //~ ERROR: 1 positional argument in format string
+}
diff --git a/src/test/ui/panics/panic-2021.stderr b/src/test/ui/panics/panic-2021.stderr
new file mode 100644
index 00000000000..59b1e4f7a98
--- /dev/null
+++ b/src/test/ui/panics/panic-2021.stderr
@@ -0,0 +1,42 @@
+error: format argument must be a string literal
+  --> $DIR/panic-2021.rs:4:12
+   |
+LL |     panic!(123);
+   |            ^^^
+   |
+help: you might be missing a string literal to format with
+   |
+LL |     panic!("{}", 123);
+   |            ^^^^^
+
+error: 1 positional argument in format string, but no arguments were given
+  --> $DIR/panic-2021.rs:5:13
+   |
+LL |     panic!("{}");
+   |             ^^
+
+error: 1 positional argument in format string, but no arguments were given
+  --> $DIR/panic-2021.rs:6:19
+   |
+LL |     core::panic!("{}");
+   |                   ^^
+
+error: format argument must be a string literal
+  --> $DIR/panic-2021.rs:7:20
+   |
+LL |     assert!(false, 123);
+   |                    ^^^
+   |
+help: you might be missing a string literal to format with
+   |
+LL |     assert!(false, "{}", 123);
+   |                    ^^^^^
+
+error: 1 positional argument in format string, but no arguments were given
+  --> $DIR/panic-2021.rs:8:21
+   |
+LL |     assert!(false, "{}");
+   |                     ^^
+
+error: aborting due to 5 previous errors
+