A Study to Test How Zongertinib is Taken up in the Blood of People With and Without Liver Problems

inclusion criteria * Male or female subjects of non-childbearing potential. Female subjects must be of non-childbearing potential either be a) postmenopausal, defined as no menses for 1 year without an alternative medical cause (in questionable cases a blood sample with levels of Follicle stimulating hormone (FSH) above 25 U/L and estradiol below 30 ng/L is confirmatory) or b) have proof of acceptable surgical sterilization. Subjects must use condom from time point of administration of trial medication until 30 days after drug administration. * Age of 18 to 80 years (inclusive) * Body mass index (BMI) of 18.0 to 42 kg/m\^2 (inclusive) * Signed and dated written informed consent in accordance with International Council for Harmonisation-Good Clinical Practice (ICH-GCP) and local legislation prior to admission to the trial * Male subjects with Women of child-bearing potential (WOCBP) partner must be willing to use highly effective methods of contraception (condom in combination with other methods or sexual abstinence) from time point of administration of trial medication until 30 days thereafter. These include: * Subject uses condoms * Subject is sexually abstinent * Subject is vasectomized (with appropriate post-vasectomy documentation of the absence of sperm in the ejaculate) and uses condom Additionally female partners of male subjects must be willing to use any of the following criteria for a highly effective contraception from at least 30 days before the first adm…