Report an error on incompatible symbol definitions

[rust.git] / src / constant.rs

diff --git a/src/constant.rs b/src/constant.rs
index 48972321a9f40e2e09c5edb8265c7d1605d241fa..9a8139053f147b5415e924e03b438f0f2ed7d8df 100644 (file)
--- a/src/constant.rs
+++ b/src/constant.rs
@@ -255,7 +255,7 @@ pub(crate) fn codegen_const_value<'tcx>(
     }
 }
 
-pub(crate) fn pointer_for_allocation<'tcx>(
+fn pointer_for_allocation<'tcx>(
     fx: &mut FunctionCx<'_, '_, 'tcx>,
     alloc: ConstAllocation<'tcx>,
 ) -> crate::pointer::Pointer {
@@ -316,14 +316,18 @@ fn data_id_for_static(
 
     let attrs = tcx.codegen_fn_attrs(def_id);
 
-    let data_id = module
-        .declare_data(
-            &*symbol_name,
-            linkage,
-            is_mutable,
-            attrs.flags.contains(CodegenFnAttrFlags::THREAD_LOCAL),
-        )
-        .unwrap();
+    let data_id = match module.declare_data(
+        &*symbol_name,
+        linkage,
+        is_mutable,
+        attrs.flags.contains(CodegenFnAttrFlags::THREAD_LOCAL),
+    ) {
+        Ok(data_id) => data_id,
+        Err(ModuleError::IncompatibleDeclaration(_)) => tcx.sess.fatal(&format!(
+            "attempt to declare `{symbol_name}` as static, but it was already declared as function"
+        )),
+        Err(err) => Err::<_, _>(err).unwrap(),
+    };
 
     if rlinkage.is_some() {
         // Comment copied from https://github.com/rust-lang/rust/blob/45060c2a66dfd667f88bd8b94261b28a58d85bd5/src/librustc_codegen_llvm/consts.rs#L141