Java: union of arrays produces a compilation failure

[rix0rrr]

Describe the bug

The following:

export type X = A[] | B[] | C;

Fails to compile in Java, because type erasure turns this into 2 arrays.

The following does work:

export type X = (A | B)[] | C;

jsii-compiler should reject the former.

Regression Issue

• Select this option if this issue appears to be a regression.

Expected Behavior

If it passes the compiler it shouldn't fail packaging.

Current Behavior

The opposite.

Reproduction Steps

SEe description.

Possible Solution

No response

Additional Information/Context

No response

SDK version used

Environment details (OS name and version, etc.)