From 64d98f8ee037282c35007b64c2649055c56af1db Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Wed, 17 Apr 2024 14:19:03 +0200 Subject: Merging upstream version 1.68.2+dfsg1. Signed-off-by: Daniel Baumann --- tests/ui/extern/extern-const.rs | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) create mode 100644 tests/ui/extern/extern-const.rs (limited to 'tests/ui/extern/extern-const.rs') diff --git a/tests/ui/extern/extern-const.rs b/tests/ui/extern/extern-const.rs new file mode 100644 index 000000000..7cef5b349 --- /dev/null +++ b/tests/ui/extern/extern-const.rs @@ -0,0 +1,26 @@ +// Check extern items cannot be const + `rustfix` suggests using +// extern static. +// +// #54388: an unused reference to an undefined static may or may not +// compile. To sidestep this by using one that *is* defined. + +// run-rustfix +// ignore-wasm32-bare no external library to link to. +// ignore-asmjs wasm2js does not support source maps yet +// compile-flags: -g +#![feature(rustc_private)] +extern crate libc; + +#[link(name = "rust_test_helpers", kind = "static")] +extern "C" { + const rust_dbg_static_mut: libc::c_int; //~ ERROR extern items cannot be `const` +} + +fn main() { + // We suggest turning the (illegal) extern `const` into an extern `static`, + // but this also requires `unsafe` (a deny-by-default lint at comment time, + // future error; Issue #36247) + unsafe { + let _x = rust_dbg_static_mut; + } +} -- cgit v1.2.3