Add test cases

yaahc · Voultapher · commit 448e51678f67 · 2025-12-14T09:54:52.000+01:00
diff --git a/tests/ui/imports/ambiguous-panic-glob-vs-multiouter.rs b/tests/ui/imports/ambiguous-panic-glob-vs-multiouter.rs
@@ -0,0 +1,20 @@
+//@ edition: 2024
+//@ check-pass
+#![crate_type = "lib"]
+mod m1 {
+    pub use core::prelude::v1::*;
+}
+
+mod m2 {
+    pub use std::prelude::v1::*;
+}
+
+#[allow(unused)]
+use m2::*;
+fn foo() {
+    use m1::*;
+
+    panic!();
+    //~^ WARN: `panic` is ambiguous [ambiguous_panic_imports]
+    //~| WARN: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
+}
diff --git a/tests/ui/imports/ambiguous-panic-glob-vs-multiouter.stderr b/tests/ui/imports/ambiguous-panic-glob-vs-multiouter.stderr
@@ -0,0 +1,25 @@
+warning: `panic` is ambiguous
+  --> $DIR/ambiguous-panic-glob-vs-multiouter.rs:20:5
+   |
+LL |     panic!();
+   |     ^^^^^ ambiguous name
+   |
+   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
+   = note: for more information, see issue #147319 <https://github.com/rust-lang/rust/issues/147319>
+   = note: ambiguous because of a conflict between a name from a glob import and an outer scope during import or macro resolution
+note: `panic` could refer to the macro imported here
+  --> $DIR/ambiguous-panic-glob-vs-multiouter.rs:15:9
+   |
+LL |     use m1::*;
+   |         ^^^^^
+   = help: consider adding an explicit import of `panic` to disambiguate
+note: `panic` could also refer to the macro imported here
+  --> $DIR/ambiguous-panic-glob-vs-multiouter.rs:13:5
+   |
+LL | use m2::*;
+   |     ^^^^^
+   = help: use `crate::panic` to refer to this macro unambiguously
+   = note: `#[warn(ambiguous_panic_imports)]` (part of `#[warn(future_incompatible)]`) on by default
+
+warning: 1 warning emitted
+
diff --git a/tests/ui/imports/ambiguous-panic-globvsglob.rs b/tests/ui/imports/ambiguous-panic-globvsglob.rs
@@ -0,0 +1,23 @@
+//@ edition: 2024
+#![crate_type = "lib"]
+mod m1 {
+    pub use core::prelude::v1::*;
+}
+
+mod m2 {
+    pub use std::prelude::v1::*;
+}
+
+#[allow(unused)]
+fn foo() {
+    use m1::*;
+    use m2::*;
+
+    // I had hoped that this would not produce the globvsglob error because it would never be
+    // resolving `panic` via one of the ambiguous glob imports above but it appears to do so, not
+    // sure why
+    panic!();
+    //~^ ERROR: `panic` is ambiguous [E0659]
+    //~| WARN: `panic` is ambiguous [ambiguous_panic_imports]
+    //~| WARN: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
+}
diff --git a/tests/ui/imports/ambiguous-panic-globvsglob.stderr b/tests/ui/imports/ambiguous-panic-globvsglob.stderr
@@ -0,0 +1,42 @@
+error[E0659]: `panic` is ambiguous
+  --> $DIR/ambiguous-panic-globvsglob.rs:19:5
+   |
+LL |     panic!();
+   |     ^^^^^ ambiguous name
+   |
+   = note: ambiguous because of multiple glob imports of a name in the same module
+note: `panic` could refer to the macro imported here
+  --> $DIR/ambiguous-panic-globvsglob.rs:13:9
+   |
+LL |     use m1::*;
+   |         ^^^^^
+   = help: consider adding an explicit import of `panic` to disambiguate
+note: `panic` could also refer to the macro imported here
+  --> $DIR/ambiguous-panic-globvsglob.rs:14:9
+   |
+LL |     use m2::*;
+   |         ^^^^^
+   = help: consider adding an explicit import of `panic` to disambiguate
+
+warning: `panic` is ambiguous
+  --> $DIR/ambiguous-panic-globvsglob.rs:19:5
+   |
+LL |     panic!();
+   |     ^^^^^ ambiguous name
+   |
+   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
+   = note: for more information, see issue #147319 <https://github.com/rust-lang/rust/issues/147319>
+   = note: ambiguous because of a conflict between a name from a glob import and an outer scope during import or macro resolution
+note: `panic` could refer to the macro imported here
+  --> $DIR/ambiguous-panic-globvsglob.rs:13:9
+   |
+LL |     use m1::*;
+   |         ^^^^^
+   = help: consider adding an explicit import of `panic` to disambiguate
+note: `panic` could also refer to a macro from prelude
+  --> $SRC_DIR/std/src/prelude/mod.rs:LL:COL
+   = note: `#[warn(ambiguous_panic_imports)]` (part of `#[warn(future_incompatible)]`) on by default
+
+error: aborting due to 1 previous error; 1 warning emitted
+
+For more information about this error, try `rustc --explain E0659`.
diff --git a/tests/ui/imports/ambiguous-panic-no-implicit-prelude.rs b/tests/ui/imports/ambiguous-panic-no-implicit-prelude.rs
@@ -0,0 +1,16 @@
+//@ edition: 2024
+#![crate_type = "lib"]
+#![no_implicit_prelude]
+
+mod m1 {
+    macro_rules! panic {
+        () => {};
+    }
+
+    pub(crate) use panic;
+}
+
+fn foo() {
+    use m1::*;
+    panic!(); //~ERROR: `panic` is ambiguous [E0659]
+}
diff --git a/tests/ui/imports/ambiguous-panic-no-implicit-prelude.stderr b/tests/ui/imports/ambiguous-panic-no-implicit-prelude.stderr
@@ -0,0 +1,19 @@
+error[E0659]: `panic` is ambiguous
+  --> $DIR/ambiguous-panic-no-implicit-prelude.rs:15:5
+   |
+LL |     panic!();
+   |     ^^^^^ ambiguous name
+   |
+   = note: ambiguous because of a conflict between a name from a glob import and an outer scope during import or macro resolution
+note: `panic` could refer to the macro imported here
+  --> $DIR/ambiguous-panic-no-implicit-prelude.rs:14:9
+   |
+LL |     use m1::*;
+   |         ^^^^^
+   = help: consider adding an explicit import of `panic` to disambiguate
+note: `panic` could also refer to a macro from prelude
+  --> $SRC_DIR/std/src/prelude/mod.rs:LL:COL
+
+error: aborting due to 1 previous error
+
+For more information about this error, try `rustc --explain E0659`.
diff --git a/tests/ui/imports/ambiguous-panic-non-prelude-core-glob.rs b/tests/ui/imports/ambiguous-panic-non-prelude-core-glob.rs
@@ -0,0 +1,11 @@
+//@ edition: 2024
+//@ check-pass
+#![crate_type = "lib"]
+
+use ::core::*;
+
+fn f() {
+    panic!();
+    //~^ WARN: `panic` is ambiguous [ambiguous_panic_imports]
+    //~| WARN: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
+}
diff --git a/tests/ui/imports/ambiguous-panic-non-prelude-core-glob.stderr b/tests/ui/imports/ambiguous-panic-non-prelude-core-glob.stderr
@@ -0,0 +1,22 @@
+warning: `panic` is ambiguous
+  --> $DIR/ambiguous-panic-non-prelude-core-glob.rs:8:5
+   |
+LL |     panic!();
+   |     ^^^^^ ambiguous name
+   |
+   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
+   = note: for more information, see issue #147319 <https://github.com/rust-lang/rust/issues/147319>
+   = note: ambiguous because of a conflict between a name from a glob import and an outer scope during import or macro resolution
+note: `panic` could refer to the macro imported here
+  --> $DIR/ambiguous-panic-non-prelude-core-glob.rs:5:5
+   |
+LL | use ::core::*;
+   |     ^^^^^^^^^
+   = help: consider adding an explicit import of `panic` to disambiguate
+   = help: or use `crate::panic` to refer to this macro unambiguously
+note: `panic` could also refer to a macro from prelude
+  --> $SRC_DIR/std/src/prelude/mod.rs:LL:COL
+   = note: `#[warn(ambiguous_panic_imports)]` (part of `#[warn(future_incompatible)]`) on by default
+
+warning: 1 warning emitted
+
diff --git a/tests/ui/imports/ambiguous-panic-non-prelude-std-glob.rs b/tests/ui/imports/ambiguous-panic-non-prelude-std-glob.rs
@@ -0,0 +1,12 @@
+//@ check-pass
+#![crate_type = "lib"]
+#![no_std]
+
+extern crate std;
+use ::std::*;
+
+fn f() {
+    panic!();
+    //~^ WARN: `panic` is ambiguous [ambiguous_panic_imports]
+    //~| WARN: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
+}
diff --git a/tests/ui/imports/ambiguous-panic-non-prelude-std-glob.stderr b/tests/ui/imports/ambiguous-panic-non-prelude-std-glob.stderr
@@ -0,0 +1,22 @@
+warning: `panic` is ambiguous
+  --> $DIR/ambiguous-panic-non-prelude-std-glob.rs:9:5
+   |
+LL |     panic!();
+   |     ^^^^^ ambiguous name
+   |
+   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
+   = note: for more information, see issue #147319 <https://github.com/rust-lang/rust/issues/147319>
+   = note: ambiguous because of a conflict between a name from a glob import and an outer scope during import or macro resolution
+note: `panic` could refer to the macro imported here
+  --> $DIR/ambiguous-panic-non-prelude-std-glob.rs:6:5
+   |
+LL | use ::std::*;
+   |     ^^^^^^^^
+   = help: consider adding an explicit import of `panic` to disambiguate
+   = help: or use `crate::panic` to refer to this macro unambiguously
+note: `panic` could also refer to a macro from prelude
+  --> $SRC_DIR/core/src/prelude/mod.rs:LL:COL
+   = note: `#[warn(ambiguous_panic_imports)]` (part of `#[warn(future_incompatible)]`) on by default
+
+warning: 1 warning emitted
+
diff --git a/tests/ui/imports/ambiguous-panic-pick-core.rs b/tests/ui/imports/ambiguous-panic-pick-core.rs
@@ -0,0 +1,14 @@
+//@ edition: 2018
+//@ check-pass
+#![crate_type = "lib"]
+#![no_std]
+
+extern crate std;
+use ::std::prelude::v1::*;
+
+fn f() {
+    panic!(std::string::String::new());
+    //~^ WARN: `panic` is ambiguous [ambiguous_panic_imports]
+    //~| WARN: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
+    //~| WARN: panic message is not a string literal [non_fmt_panics]
+}
diff --git a/tests/ui/imports/ambiguous-panic-pick-core.stderr b/tests/ui/imports/ambiguous-panic-pick-core.stderr
@@ -0,0 +1,36 @@
+warning: `panic` is ambiguous
+  --> $DIR/ambiguous-panic-pick-core.rs:10:5
+   |
+LL |     panic!(std::string::String::new());
+   |     ^^^^^ ambiguous name
+   |
+   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
+   = note: for more information, see issue #147319 <https://github.com/rust-lang/rust/issues/147319>
+   = note: ambiguous because of a conflict between a name from a glob import and an outer scope during import or macro resolution
+note: `panic` could refer to the macro imported here
+  --> $DIR/ambiguous-panic-pick-core.rs:7:5
+   |
+LL | use ::std::prelude::v1::*;
+   |     ^^^^^^^^^^^^^^^^^^^^^
+   = help: consider adding an explicit import of `panic` to disambiguate
+   = help: or use `crate::panic` to refer to this macro unambiguously
+note: `panic` could also refer to a macro from prelude
+  --> $SRC_DIR/core/src/prelude/mod.rs:LL:COL
+   = note: `#[warn(ambiguous_panic_imports)]` (part of `#[warn(future_incompatible)]`) on by default
+
+warning: panic message is not a string literal
+  --> $DIR/ambiguous-panic-pick-core.rs:10:12
+   |
+LL |     panic!(std::string::String::new());
+   |            ^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+   = note: this usage of `panic!()` is deprecated; it will be a hard error in Rust 2021
+   = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/panic-macro-consistency.html>
+   = note: `#[warn(non_fmt_panics)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
+help: add a "{}" format string to `Display` the message
+   |
+LL |     panic!("{}", std::string::String::new());
+   |            +++++
+
+warning: 2 warnings emitted
+
diff --git a/tests/ui/imports/ambiguous-panic-pick-std.rs b/tests/ui/imports/ambiguous-panic-pick-std.rs
@@ -0,0 +1,11 @@
+//@ edition: 2018
+#![crate_type = "lib"]
+use ::core::prelude::v1::*;
+
+#[allow(unused)]
+fn f() {
+    panic!(std::string::String::new());
+    //~^ WARN: `panic` is ambiguous [ambiguous_panic_imports]
+    //~| WARN: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
+    //~| ERROR: mismatched types [E0308]
+}
diff --git a/tests/ui/imports/ambiguous-panic-pick-std.stderr b/tests/ui/imports/ambiguous-panic-pick-std.stderr
@@ -0,0 +1,39 @@
+warning: `panic` is ambiguous
+  --> $DIR/ambiguous-panic-pick-std.rs:7:5
+   |
+LL |     panic!(std::string::String::new());
+   |     ^^^^^ ambiguous name
+   |
+   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
+   = note: for more information, see issue #147319 <https://github.com/rust-lang/rust/issues/147319>
+   = note: ambiguous because of a conflict between a name from a glob import and an outer scope during import or macro resolution
+note: `panic` could refer to the macro imported here
+  --> $DIR/ambiguous-panic-pick-std.rs:3:5
+   |
+LL | use ::core::prelude::v1::*;
+   |     ^^^^^^^^^^^^^^^^^^^^^^
+   = help: consider adding an explicit import of `panic` to disambiguate
+   = help: or use `crate::panic` to refer to this macro unambiguously
+note: `panic` could also refer to a macro from prelude
+  --> $SRC_DIR/std/src/prelude/mod.rs:LL:COL
+   = note: `#[warn(ambiguous_panic_imports)]` (part of `#[warn(future_incompatible)]`) on by default
+
+error[E0308]: mismatched types
+  --> $DIR/ambiguous-panic-pick-std.rs:7:12
+   |
+LL |     panic!(std::string::String::new());
+   |     -------^^^^^^^^^^^^^^^^^^^^^^^^^^-
+   |     |      |
+   |     |      expected `&str`, found `String`
+   |     arguments to this function are incorrect
+   |
+note: function defined here
+  --> $SRC_DIR/core/src/panicking.rs:LL:COL
+help: consider borrowing here
+   |
+LL |     panic!(&std::string::String::new());
+   |            +
+
+error: aborting due to 1 previous error; 1 warning emitted
+
+For more information about this error, try `rustc --explain E0308`.
diff --git a/tests/ui/imports/ambiguous-panic-rename-builtin.rs b/tests/ui/imports/ambiguous-panic-rename-builtin.rs
@@ -0,0 +1,16 @@
+//@ edition: 2024
+#![crate_type = "lib"]
+#![no_std]
+
+extern crate std;
+mod m1 {
+    pub use std::prelude::v1::env as panic;
+}
+use m1::*;
+
+fn xx() {
+    panic!();
+    //~^ ERROR: `env!()` takes 1 or 2 arguments
+    //~| WARN: `panic` is ambiguous [ambiguous_panic_imports]
+    //~| WARN: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
+}
diff --git a/tests/ui/imports/ambiguous-panic-rename-builtin.stderr b/tests/ui/imports/ambiguous-panic-rename-builtin.stderr
@@ -0,0 +1,28 @@
+error: `env!()` takes 1 or 2 arguments
+  --> $DIR/ambiguous-panic-rename-builtin.rs:12:5
+   |
+LL |     panic!();
+   |     ^^^^^^^^
+
+warning: `panic` is ambiguous
+  --> $DIR/ambiguous-panic-rename-builtin.rs:12:5
+   |
+LL |     panic!();
+   |     ^^^^^ ambiguous name
+   |
+   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
+   = note: for more information, see issue #147319 <https://github.com/rust-lang/rust/issues/147319>
+   = note: ambiguous because of a conflict between a name from a glob import and an outer scope during import or macro resolution
+note: `panic` could refer to the macro imported here
+  --> $DIR/ambiguous-panic-rename-builtin.rs:9:5
+   |
+LL | use m1::*;
+   |     ^^^^^
+   = help: consider adding an explicit import of `panic` to disambiguate
+   = help: or use `crate::panic` to refer to this macro unambiguously
+note: `panic` could also refer to a macro from prelude
+  --> $SRC_DIR/core/src/prelude/mod.rs:LL:COL
+   = note: `#[warn(ambiguous_panic_imports)]` (part of `#[warn(future_incompatible)]`) on by default
+
+error: aborting due to 1 previous error; 1 warning emitted
+
diff --git a/tests/ui/imports/ambiguous-panic-rename-panics.rs b/tests/ui/imports/ambiguous-panic-rename-panics.rs
@@ -0,0 +1,17 @@
+//@ edition: 2024
+#![crate_type = "lib"]
+
+mod m1 {
+    pub use core::prelude::v1::panic as p;
+}
+
+mod m2 {
+    pub use std::prelude::v1::panic as p;
+}
+
+use m2::*;
+fn xx() {
+    use m1::*;
+
+    p!(); //~ ERROR: `p` is ambiguous [E0659]
+}
diff --git a/tests/ui/imports/ambiguous-panic-rename-panics.stderr b/tests/ui/imports/ambiguous-panic-rename-panics.stderr
