Method: KeyError#key

Defined in:
error.c

#key ⇒ Object

Return the key caused this KeyError exception.

Returns:

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# File 'error.c', line 2075

static VALUE
key_err_key(VALUE self)
{
    VALUE key;

    key = rb_ivar_lookup(self, id_key, Qundef);
    if (key != Qundef) return key;
    rb_raise(rb_eArgError, "no key is available");
}