gnu /
gcc /
df3ae94a5eb3090e59d5fd8d3ccc3d8231bac87f c++: ICE with structured bindings and m-d array [PR102594]
We ICE in decay_conversion with this test:
struct S {
S() {}
};
S arr[1][1];
auto [m](arr3);
But not when the last line is:
auto [n] = arr3;
Therefore the difference is between copy- and direct-init. In
particular, in build_vec_init we have:
if (direct_init)
from = build_tree_list (NULL_TREE, from);
and then we call build_vec_init again with init==from. Then
decay_conversion gets the TREE_LIST and it crashes.
build_aggr_init has:
/* Wrap the initializer in a CONSTRUCTOR so that build_vec_init
recognizes it as direct-initialization. */
init = build_constructor_single (init_list_type_node,
NULL_TREE, init);
CONSTRUCTOR_IS_DIRECT_INIT (init) = true;
so I propose to do the same in build_vec_init.
PR c++/102594
gcc/cp/ChangeLog:
* init.cc (build_vec_init): Build up a CONSTRUCTOR to signal
direct-initialization rather than a TREE_LIST.
gcc/testsuite/ChangeLog:
* g++.dg/cpp1z/decomp61.C: New test.
Reviewed-by: Jason Merrill <jason@redhat.com>
(cherry picked from commit 96e0370f4daef29b918aafcff68c7f5e4ef397fd)
2 files changed
