1 files changed, 89 insertions, 0 deletions
diff --git a/src/test/ui/non-fmt-panic.rs b/src/test/ui/non-fmt-panic.rs
new file mode 100644
index 000000000..d0d06b797
--- /dev/null
+++ b/src/test/ui/non-fmt-panic.rs
@@ -0,0 +1,89 @@
+// run-rustfix
+// rustfix-only-machine-applicable
+// build-pass (FIXME(62277): should be check-pass)
+// aux-build:fancy-panic.rs
+
+extern crate fancy_panic;
+
+const C: &str = "abc {}";
+static S: &str = "{bla}";
+
+#[allow(unreachable_code)]
+fn main() {
+    panic!("here's a brace: {"); //~ WARN panic message contains a brace
+    unreachable!("here's a brace: {"); //~ WARN panic message contains a brace
+    std::panic!("another one: }"); //~ WARN panic message contains a brace
+    core::panic!("Hello {}"); //~ WARN panic message contains an unused formatting placeholder
+    assert!(false, "{:03x} {test} bla");
+    //~^ WARN panic message contains unused formatting placeholders
+    assert!(false, S);
+    //~^ WARN panic message is not a string literal
+    assert!(false, 123);
+    //~^ WARN panic message is not a string literal
+    assert!(false, Some(123));
+    //~^ WARN panic message is not a string literal
+    debug_assert!(false, "{{}} bla"); //~ WARN panic message contains braces
+    panic!(C); //~ WARN panic message is not a string literal
+    panic!(S); //~ WARN panic message is not a string literal
+    unreachable!(S); //~ WARN panic message is not a string literal
+    unreachable!(S); //~ WARN panic message is not a string literal
+    std::panic!(123); //~ WARN panic message is not a string literal
+    core::panic!(&*"abc"); //~ WARN panic message is not a string literal
+    panic!(Some(123)); //~ WARN panic message is not a string literal
+    panic!(concat!("{", "}")); //~ WARN panic message contains an unused formatting placeholder
+    panic!(concat!("{", "{")); //~ WARN panic message contains braces
+
+    fancy_panic::fancy_panic!("test {} 123");
+    //~^ WARN panic message contains an unused formatting placeholder
+
+    fancy_panic::fancy_panic!(); // OK
+    fancy_panic::fancy_panic!(S); // OK
+
+    macro_rules! a {
+        () => { 123 };
+    }
+
+    panic!(a!()); //~ WARN panic message is not a string literal
+    unreachable!(a!()); //~ WARN panic message is not a string literal
+
+    panic!(format!("{}", 1)); //~ WARN panic message is not a string literal
+    unreachable!(format!("{}", 1)); //~ WARN panic message is not a string literal
+    assert!(false, format!("{}", 1)); //~ WARN panic message is not a string literal
+    debug_assert!(false, format!("{}", 1)); //~ WARN panic message is not a string literal
+
+    panic![123]; //~ WARN panic message is not a string literal
+    panic!{123}; //~ WARN panic message is not a string literal
+
+    // Check that the lint only triggers for std::panic and core::panic,
+    // not any panic macro:
+    macro_rules! panic {
+        ($e:expr) => ();
+    }
+    panic!("{}"); // OK
+    panic!(S); // OK
+
+    a(1);
+    b(1);
+    c(1);
+    d(1);
+}
+
+fn a<T: Send + 'static>(v: T) {
+    panic!(v); //~ WARN panic message is not a string literal
+    assert!(false, v); //~ WARN panic message is not a string literal
+}
+
+fn b<T: std::fmt::Debug + Send + 'static>(v: T) {
+    panic!(v); //~ WARN panic message is not a string literal
+    assert!(false, v); //~ WARN panic message is not a string literal
+}
+
+fn c<T: std::fmt::Display + Send + 'static>(v: T) {
+    panic!(v); //~ WARN panic message is not a string literal
+    assert!(false, v); //~ WARN panic message is not a string literal
+}
+
+fn d<T: std::fmt::Display + std::fmt::Debug + Send + 'static>(v: T) {
+    panic!(v); //~ WARN panic message is not a string literal
+    assert!(false, v); //~ WARN panic message is not a string literal
+}