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AB4.21で次のコードをコンパイルしようとすると，
デバッグ・リリース共にコンパイル途中でBasicCompiler.exeが強制終了されてしまいます。

#strict
TypeDef HRESULT = Long

Type VARIANT
End Type

Class Test
Public
	Virtual Function f(
		Macro_1 As QWord, Macro_2 As QWord,
		Arg1_1 As QWord, Arg1_2 As QWord,
		Arg2_1 As QWord, Arg2_2 As QWord,
		Arg3_1 As QWord, Arg3_2 As QWord,
		Arg4_1 As QWord, Arg4_2 As QWord,
		Arg5_1 As QWord, Arg5_2 As QWord,
		Arg6_1 As QWord, Arg6_2 As QWord,
		Arg7_1 As QWord, Arg7_2 As QWord,
		Arg8_1 As QWord, Arg8_2 As QWord,
		Arg9_1 As QWord, Arg9_2 As QWord,
		Arg10_1 As QWord, Arg10_2 As QWord,
		Arg11_1 As QWord, Arg11_2 As QWord,
		Arg12_1 As QWord, Arg12_2 As QWord,
		Arg13_1 As QWord, Arg13_2 As QWord,
		Arg14_1 As QWord, Arg14_2 As QWord,
		Arg15_1 As QWord, Arg15_2 As QWord,
		Arg16_1 As QWord, Arg16_2 As QWord,
		Arg17_1 As QWord, Arg17_2 As QWord,
		Arg18_1 As QWord, Arg18_2 As QWord,
		Arg19_1 As QWord, Arg19_2 As QWord,
		Arg20_1 As QWord, Arg20_2 As QWord,
		Arg21_1 As QWord, Arg21_2 As QWord,
		Arg22_1 As QWord, Arg22_2 As QWord,
		Arg23_1 As QWord, Arg23_2 As QWord,
		Arg24_1 As QWord, Arg24_2 As QWord,
		Arg25_1 As QWord, Arg25_2 As QWord,
		Arg26_1 As QWord, Arg26_2 As QWord,
		Arg27_1 As QWord, Arg27_2 As QWord,
		Arg28_1 As QWord, Arg28_2 As QWord,
		Arg29_1 As QWord, Arg29_2 As QWord,
		Arg30_1 As QWord, Arg30_2 As QWord,
		/*[out,retval]*/ RHS As *VARIANT) As HRESULT
End Class

なんでこんなに大量の引数が必要かというと，
ExcelのApplicationインターフェイスのRunメソッドがそうなっているからです。
本当はVARIANTを値渡ししているのですが，ABでは構造体の値渡しができないため，
苦肉の策としてQWord型の引数2つに分割した結果，こんなことになってしまったのです。
（ようするに，元からArg1～Arg30までという具合で十分引数は多かったのですけどね）

ご報告ありがとうございます。次回のバージョンアップで修正します。

ab.com コミュニティ

巨大なインターフェイスの宣言時

巨大なインターフェイスの宣言時