Internal compiler error when matching an undeclared type

[wlott]

When using the match pattern = expr; form and the pattern references a undefined/unknown type:

package MatchInternalError;
module mkMatchInternalError(Empty);
   match UndeclaredType { next_pc: .next_pc, rd: .rd, u_imm20: .u_imm20, op: .op } = ?;
endmodule
endpackage

bsc fails with the following error message:

Internal Bluespec Compiler Error:
Please report this failure to the BSC developers, by opening a ticket
in the issue database: https://github.com/B-Lang-org/bsc/issues
The following internal error message should be included in your
correspondence along with any other relevant details:
Bluespec Compiler, version 2025.01 (build a798d8a9)
getTInfo: UndeclaredType