https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102576
--- Comment #1 from Johel Ernesto Guerrero Peña <johelegp at gmail dot com> ---
`<array>` is specified as including `<initializer_list>`.
It doesn't with with that either:
```C++
import<array>;
namespace {
constexpr void test() {
for (const int i : {0, 1, -1}) { }
```
```
error: deducing from brace-enclosed initializer list requires ‘#include
<initializer_list>’
2 | import<array>;
+++ |+#include <initializer_list>
3 | // import<iterator>;
......
10 | for (const int i : {0, 1, -1}) {
| ^
```
This might apply more generally to standard headers specified as including
other headers.
