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Diffstat (limited to '')
-rw-r--r-- | src/test/ui/statics/issue-91050-1.rs | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/src/test/ui/statics/issue-91050-1.rs b/src/test/ui/statics/issue-91050-1.rs new file mode 100644 index 000000000..403a41462 --- /dev/null +++ b/src/test/ui/statics/issue-91050-1.rs @@ -0,0 +1,34 @@ +// build-pass +// compile-flags: --crate-type=rlib --emit=llvm-ir -Cno-prepopulate-passes + +// This test declares globals by the same name with different types, which +// caused problems because Module::getOrInsertGlobal would return a Constant* +// bitcast instead of a GlobalVariable* that could access linkage/visibility. +// In alt builds with LLVM assertions this would fail: +// +// rustc: /checkout/src/llvm-project/llvm/include/llvm/Support/Casting.h:269: +// typename cast_retty<X, Y *>::ret_type llvm::cast(Y *) [X = llvm::GlobalValue, Y = llvm::Value]: +// Assertion `isa<X>(Val) && "cast<Ty>() argument of incompatible type!"' failed. +// +// In regular builds, the bad cast was UB, like "Invalid LLVMRustVisibility value!" + +pub mod before { + #[no_mangle] + pub static GLOBAL1: [u8; 1] = [1]; +} + +pub mod inner { + extern "C" { + pub static GLOBAL1: u8; + pub static GLOBAL2: u8; + } + + pub fn call() { + drop(unsafe { (GLOBAL1, GLOBAL2) }); + } +} + +pub mod after { + #[no_mangle] + pub static GLOBAL2: [u8; 1] = [2]; +} |