In all app image packaging tests output of on all platforms:
---
[17:31:52.845] TRACE: assertTrue(): Unexptected value in app image file for <signed>
[17:31:52.860] TRACE: assertTrue(): Unexptected value in app image file for <app-store>
---
These checks were introduced in JDK-8293462. Commit - https://github.com/openjdk/jdk/commit/1e222bccd3807c1be0d1d824e0ff9745751d8375#diff-1c3ecd7a8a4a4125f52b6f7a7d4f83a050b5f3603d074151ab946f877e6c6d9fR845
The checks are harmless but should be executed only on osx.