--- /dev/null
+// originally from rustc ./src/test/ui/macros/issue-78325-inconsistent-resolution.rs
+// inconsistent resolution for a macro
+
+macro_rules! define_other_core {
+ ( ) => {
+ extern crate std as core;
+ //~^ ERROR macro-expanded `extern crate` items cannot shadow names passed with `--extern`
+ };
+}
+
+fn main() {
+ core::panic!();
+}
+
+define_other_core!();