It turns out there are legitimate cases for the new decl to not have
lang-specific.
PR c++/97905
gcc/cp/
* decl.c (duplicate_decls): Relax new assert.
gcc/testsuite/
* g++.dg/lookup/pr97905.C: New.
pushing to trunk
--
Nathan Sidwell
diff --git c/gcc/cp/decl.c w/gcc/cp/decl.c
index d90e9840f40..f5c6f5c0d10 100644
--- c/gcc/cp/decl.c
+++ w/gcc/cp/decl.c
@@ -2749,9 +2749,8 @@ duplicate_decls (tree newdecl, tree olddecl, bool hiding, bool was_hidden)
with that from NEWDECL below. */
if (DECL_LANG_SPECIFIC (olddecl))
{
- gcc_checking_assert (DECL_LANG_SPECIFIC (newdecl)
- && (DECL_LANG_SPECIFIC (olddecl)
- != DECL_LANG_SPECIFIC (newdecl)));
+ gcc_checking_assert (DECL_LANG_SPECIFIC (olddecl)
+ != DECL_LANG_SPECIFIC (newdecl));
ggc_free (DECL_LANG_SPECIFIC (olddecl));
}
diff --git c/gcc/testsuite/g++.dg/lookup/pr97905.C w/gcc/testsuite/g++.dg/lookup/pr97905.C
new file mode 100644
index 00000000000..22a7e5cf6d4
--- /dev/null
+++ w/gcc/testsuite/g++.dg/lookup/pr97905.C
@@ -0,0 +1,7 @@
+// PR 97905
+
+
+template <typename> void a() {
+ extern int *b; // This decl gets an (unneeded) decl-lang-specific
+}
+int *b; // this does not
