[Clang][Windows] Accepts invalid `[] int x;`

[MagentaTreehouse]

[] int x;

This code is invalid but accepted by Clang on Windows, reproducible with the main branch.
See https://compiler-explorer.com/z/s65rv9Pcf. (clang-cl 18.1 only)

[EugeneZelenko]

Could you please try 21 or main branch? Only most recent release is maintained.

[llvmbot]

@llvm/issue-subscribers-clang-frontend

Author: None (MagentaTreehouse)

Details

```c++ [] int x; ``` This code is invalid but accepted by Clang on Windows, reproducible with the main branch. See https://compiler-explorer.com/z/s65rv9Pcf. (clang-cl 18.1 only)

[MagentaTreehouse]

Could you please try 21 or main branch? Only most recent release is maintained.

@EugeneZelenko Yes, this is reproducible with the main branch as described in the OP. It is Compiler Explorer that provides 18.1 only for clang-cl.

[keinflue]

Also reproducible with -fms-extensions and usual clang driver on main: https://compiler-explorer.com/z/xcs6axovW