[llvm-bugs] [Bug 61427] [C++20] [Modules] The entity with internal linkage shouldn't be accessed in other TU even if they are in the same module

[LLVM Bugs via llvm-bugs]

Issue	61427
Summary	[C++20] [Modules] The entity with internal linkage shouldn't be accessed in other TU even if they are in the same module
Labels	clang:modules
Assignees
Reporter	ChuanqiXu9

    Reproducer:

```
export module m:a;
static int a = 32;
```

```
export module m:b;
import :a;
int b() {
    return a;
}
```

Currently the reproducer is accepted. But we expect the compiler  to reject it and saying that the partition b can't access the static variable 'a' in partition a.

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