> Bootstrapped and regtested on x86_64-pc-linux-gnu, OK for trunk?
>
> -- >8 --
>
> This fixes a null dereference issue when decl_specifiers.type is not yet
> provided.
>
> gcc/cp/ChangeLog:
>
> * parser.cc (cp_parser_parameter_declaration): Check if
> decl_specifiers.type is null.
>
> gcc/testsuite/ChangeLog:
>
> * g++.dg/cpp23/explicit-obj-basic7.C: New test.
LGTM
>
> Signed-off-by: Nathaniel Shead <nathanielosh...@gmail.com>
> ---
> gcc/cp/parser.cc | 5 +++--
> gcc/testsuite/g++.dg/cpp23/explicit-obj-basic7.C | 9 +++++++++
> 2 files changed, 12 insertions(+), 2 deletions(-)
> create mode 100644 gcc/testsuite/g++.dg/cpp23/explicit-obj-basic7.C
>
> diff --git a/gcc/cp/parser.cc b/gcc/cp/parser.cc
> index 50d3ad35b61..97ee2650dc4 100644
> --- a/gcc/cp/parser.cc
> +++ b/gcc/cp/parser.cc
> @@ -25780,8 +25780,9 @@ cp_parser_parameter_declaration (cp_parser *parser,
> }
>
> if (xobj_param_p
> - && (declarator ? declarator->parameter_pack_p
> - : PACK_EXPANSION_P (decl_specifiers.type)))
> + && ((declarator && declarator->parameter_pack_p)
> + || (decl_specifiers.type
> + && PACK_EXPANSION_P (decl_specifiers.type))))
> {
> location_t xobj_param
> = make_location (decl_specifiers.locations[ds_this],
> diff --git a/gcc/testsuite/g++.dg/cpp23/explicit-obj-basic7.C
> b/gcc/testsuite/g++.dg/cpp23/explicit-obj-basic7.C
> new file mode 100644
> index 00000000000..a474e97fc18
> --- /dev/null
> +++ b/gcc/testsuite/g++.dg/cpp23/explicit-obj-basic7.C
> @@ -0,0 +1,9 @@
> +// { dg-do compile { target c++23 } }
> +
> +// Shouldn't ICE
> +struct S {
> + void a(this long);
> + void b(this const long);
> + void c(this long unsigned);
> + void c(this signed);
> +};
> --
> 2.43.2
>
>
