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c++: Fix ICE with xobj parms and maybe incomplete decl-specifiers

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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.

Signed-off-by: Nathaniel Shead <nathanieloshead@gmail.com>
This commit is contained in:
Nathaniel Shead 2024-04-20 14:44:11 +10:00
parent 628c2221d3
commit 7318f1a389
2 changed files with 12 additions and 2 deletions
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5
gcc/cp/parser.cc
View File

@ -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],

9
gcc/testsuite/g++.dg/cpp23/explicit-obj-basic7.C Normal file
View File

@ -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);
};