This patch fixes PR c++/96329 which is an ICE-on-invalid-code regression
affecting mainline.
This patch has been tested on x86_64-pc-linux-gnu, enabling languages
c and c++, with make bootstrap and make -k check with no new failures.
Ok for mainline?
2022-03-07 Roger Sayle <ro...@nextmovesoftware.com>
gcc/cp/ChangeLog
PR c++/96329
* parser.cc (cp_parser_linkage_specification): Treat the case where
linkage is error_mark_node as "invalid linkage-specification".
gcc/testsuite/ChangeLog
PR c++/96329
* g++.dg/pr96329.C: New test case.
Thanks in advance,
Roger
--
diff --git a/gcc/cp/parser.cc b/gcc/cp/parser.cc
index 03d99ab..d2993c7 100644
--- a/gcc/cp/parser.cc
+++ b/gcc/cp/parser.cc
@@ -16148,8 +16148,9 @@ cp_parser_linkage_specification (cp_parser* parser,
tree prefix_attr)
/* Transform the literal into an identifier. If the literal is a
wide-character string, or contains embedded NULs, then we can't
handle it as the user wants. */
- if (strlen (TREE_STRING_POINTER (linkage))
- != (size_t) (TREE_STRING_LENGTH (linkage) - 1))
+ if (linkage == error_mark_node
+ || strlen (TREE_STRING_POINTER (linkage))
+ != (size_t) (TREE_STRING_LENGTH (linkage) - 1))
{
cp_parser_error (parser, "invalid linkage-specification");
/* Assume C++ linkage. */
diff --git a/gcc/testsuite/g++.dg/pr96329.C b/gcc/testsuite/g++.dg/pr96329.C
new file mode 100644
index 0000000..c9f44b7
--- /dev/null
+++ b/gcc/testsuite/g++.dg/pr96329.C
@@ -0,0 +1,5 @@
+/* { dg-do compile } */
+/* { dg-options "-O2" } */
+/* { dg-excess-errors "" } */
+
+extern "C" ""a
