ClassCastException in @ParameterizedTest: Base Class from Different Class Loader

[schulzp]

Describe the bug
Running a @QuarkusTest fails with a java.lang.ClassCastException, see MWE.

Expected behavior
The tests passes.

Actual behavior
When using @ParameterizedTest with @MethodSource, see MWE, the test fails with the following exception:
java.lang.ClassCastException: class org.hamcrest.core.Is cannot be cast to class org.hamcrest.Matcher (org.hamcrest.core.Is is in unnamed module of loader 'app'; org.hamcrest.Matcher is in unnamed module of loader io.quarkus.bootstrap.classloading.QuarkusClassLoader @7188af83)

However, if the test parameters are mapped manually (using a regular @Test) it passes.

To Reproduce
Steps to reproduce the behavior:

1. Check out the MWE
2. run ./mvnw verify

Configuration

# no properties are set explicitly

Environment (please complete the following information):

• Output of uname -a or ver:

  Darwin Kernel Version 19.3.0; root:xnu-6153.81.5~1/RELEASE_X86_64 x86_64
  

• Output of java -version: 11.0.1, vendor: Oracle Corporation
• Quarkus version or git rev: 1.3.1.Final
• Build tool (ie. output of mvnw --version or gradlew --version):

  Apache Maven 3.6.3 (cecedd343002696d0abb50b32b541b8a6ba2883f)
  Java version: 11.0.1, vendor: Oracle Corporation, runtime: [...]
  Default locale: de_DE, platform encoding: UTF-8
  OS name: "mac os x", version: "10.15.3", arch: "x86_64", family: "mac"
  

Additional context
The behavior occurred when I upgraded quarkus from 1.2.1.Final to 1.3.0.Final/1.3.1.Final.

[geoand]

The issue should be fixed by #8252