致ち命めい的てき誤あやまり

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Meanings

1

noun

fatal error

computing

Computing term for an error that causes a program or system to crash or become unusable.

致doth, do, send

命fate, command, decree

的bull's eye, mark, target

誤mistake, err, do wrong

エラー
General term for any error; 致命的誤り specifically refers to a fatal, unrecoverable error.
バグ
A bug is a flaw in the program; a fatal error is the severe consequence that may result from a bug.

Compound of 致命的 (fatal) + 誤り (error). A straightforward technical term.