Use edition of macro_rules when compiling the macro

compiler/rustc_resolve/src/def_collector.rs

@@ -191,7 +191,7 @@ impl<'a, 'ra, 'tcx> visit::Visitor<'a> for DefCollector<'a, 'ra, 'tcx> {
             ItemKind::Const(..) => DefKind::Const,
             ItemKind::Fn(..) | ItemKind::Delegation(..) => DefKind::Fn,
             ItemKind::MacroDef(def) => {
-                let edition = self.resolver.tcx.sess.edition();
+                let edition = i.span.edition();
                 let macro_data =
                     self.resolver.compile_macro(def, i.ident, &i.attrs, i.span, i.id, edition);
                 let macro_kind = macro_data.ext.macro_kind();

tests/ui/proc-macro/auxiliary/macro_rules_edition_pm.rs

@@ -0,0 +1,42 @@
+//@ force-host
+//@ no-prefer-dynamic
+
+#![crate_type = "proc-macro"]
+
+extern crate proc_macro;
+
+use proc_macro::TokenStream;
+
+#[proc_macro]
+pub fn make_edition_macro(_input: TokenStream) -> TokenStream {
+    "macro_rules! edition {
+        ($_:expr) => {
+            2024
+        };
+        (const {}) => {
+            2021
+        };
+    }
+    "
+    .parse()
+    .unwrap()
+}
+
+#[proc_macro]
+pub fn make_nested_edition_macro(_input: TokenStream) -> TokenStream {
+    "macro_rules! make_inner {
+        () => {
+            macro_rules! edition_inner {
+                ($_:expr) => {
+                    2024
+                };
+                (const {}) => {
+                    2021
+                };
+            }
+        };
+    }
+    "
+    .parse()
+    .unwrap()
+}

tests/ui/proc-macro/macro_rules_edition_from_pm.rs

@@ -0,0 +1,27 @@
+// Tests how edition hygiene works for macro_rules macros generated from a
+// proc-macro.
+// See https://github.com/rust-lang/rust/issues/132906
+
+//@ aux-crate: macro_rules_edition_pm=macro_rules_edition_pm.rs
+//@ revisions: edition2021 edition2024
+//@[edition2021] edition:2021
+//@[edition2024] edition:2024
+//@[edition2024] compile-flags: -Zunstable-options
+//@ check-pass
+
+// This checks how the expr fragment specifier works.
+macro_rules_edition_pm::make_edition_macro!{}
+
+const _: () = {
+    assert!(edition!(const {}) == 2021);
+};
+
+// This checks how the expr fragment specifier from a nested macro.
+macro_rules_edition_pm::make_nested_edition_macro!{}
+make_inner!{}
+
+const _: () = {
+    assert!(edition_inner!(const {}) == 2021);
+};
+
+fn main() {}

tests/ui/rust-2024/unsafe-attributes/auxiliary/unsafe-attributes-pm.rs

@@ -0,0 +1,22 @@
+//@ force-host
+//@ no-prefer-dynamic
+
+#![crate_type = "proc-macro"]
+
+extern crate proc_macro;
+
+use proc_macro::TokenStream;
+
+#[proc_macro]
+pub fn missing_unsafe(_input: TokenStream) -> TokenStream {
+    "#[no_mangle] pub fn abc() {}".parse().unwrap()
+}
+
+#[proc_macro]
+pub fn macro_rules_missing_unsafe(_input: TokenStream) -> TokenStream {
+    "macro_rules! make_fn {
+        () => { #[no_mangle] pub fn foo() { } };
+    }"
+    .parse()
+    .unwrap()
+}

tests/ui/rust-2024/unsafe-attributes/unsafe-attributes-from-pm.rs

@@ -0,0 +1,17 @@
+// Test for unsafe attributes generated by a proc-macro.
+// See https://github.com/rust-lang/rust/issues/132906
+
+//@ revisions: edition2021 edition2024
+//@ check-pass
+//@[edition2021] edition:2021
+//@[edition2024] edition:2024
+//@[edition2024] compile-flags: -Zunstable-options
+//@ aux-crate: unsafe_attributes_pm=unsafe-attributes-pm.rs
+
+unsafe_attributes_pm::missing_unsafe!();
+
+unsafe_attributes_pm::macro_rules_missing_unsafe!();
+
+make_fn!();
+
+fn main() {}