https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102071
Bug ID: 102071
Summary: crash when combining -faligned-new=N with array cookie
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: richard-gccbugzilla at metafoo dot co.uk
Target Milestone: ---
Testcase:
struct X { ~X(); int c; };
extern int n;
X *p = new X[n];
Compiling with -faligned-new=2 gives:
<source>:3:15: internal compiler error: tree check: expected class 'vl_exp',
have 'unary' (nop_expr) in stabilize_call, at cp/tree.c:5739
3 | X *p = new X[n];
| ^
0x1f2c1d9 internal_error(char const*, ...)
???:0
0x6baa59 tree_class_check_failed(tree_node const*, tree_code_class, char
const*, int, char const*)
???:0
0xab0d8d stabilize_call(tree_node*, tree_node**)
???:0
0x8e0551 build_new(unsigned int, vec<tree_node*, va_gc, vl_embed>**,
tree_node*, tree_node*, vec<tree_node*, va_gc, vl_embed>**, int, int)
???:0
0x9cffc5 c_parse_file()
???:0
0xb55092 c_common_parse_file()
???:0
FWIW, for this example, Clang passes align_val_t{max(alignof(size_t),
alignof(X))} as the alignment argument to ensure the cookie is suitably
aligned.
