forceContextQualifier has been broken since Tycho 4.0.5

[orionll]

There is an infinite recursion in AbstractTychoMapping.modelHasProperty if Tycho build is called with -DforceContextQualifier.
Steps to reproduce:

• Clone https://github.com/vogellacompany/tycho-example
• Run mvn clean verify -DskipTests -DforceContextQualifier=100500
• The build runs fine because the version of Tycho in the project is 4.0.4
• Now change the version of Tycho to 4.0.5 (or 4.0.6/4.0.7) in pom.xml and .mvn/extensions.xml
• Run mvn clean verify -DskipTests -DforceContextQualifier=100500 again
• The build is running much slower (or fails with OutOfMemoryError)

The bug was introduced in this commit by @laeubi: #3320.

If you run mvn with -X, you will notice many lines like these:

[DEBUG] C:\Projects\TreeAge\tycho-example\bundles\.polyglot.pom.tycho
[DEBUG] Generate aggregator pom for C:\Projects\TreeAge\tycho-example\bundles\pom.tycho
[DEBUG] Adding module com.vogella.logging.config
[DEBUG] Adding module com.vogella.tycho.p2.ui
[DEBUG] Adding module com.vogella.tycho.platform
[DEBUG] Adding module com.vogella.tycho.platform.linux
[DEBUG] Adding module com.vogella.tycho.plugin1
[DEBUG] Adding module com.vogella.tycho.rcp
[DEBUG] Derived parent for path C:\Projects\TreeAge\tycho-example\bundles is groupId: com.vogella.tycho, artifactId: com.vogella.tycho.root, relativePath: ..\pom.xml
[DEBUG] C:\Projects\TreeAge\tycho-example\bundles\com.vogella.logging.config\.polyglot.META-INF
[DEBUG] C:\Projects\TreeAge\tycho-example\bundles\.polyglot.pom.tycho
[DEBUG] Generate aggregator pom for C:\Projects\TreeAge\tycho-example\bundles\pom.tycho
[DEBUG] Adding module com.vogella.logging.config
[DEBUG] Adding module com.vogella.tycho.p2.ui
[DEBUG] Adding module com.vogella.tycho.platform
[DEBUG] Adding module com.vogella.tycho.platform.linux
[DEBUG] Adding module com.vogella.tycho.plugin1
[DEBUG] Adding module com.vogella.tycho.rcp
[DEBUG] Derived parent for path C:\Projects\TreeAge\tycho-example\bundles\com.vogella.logging.config is groupId: com.vogella.tycho, artifactId: bundles, relativePath: ..\.polyglot.pom.tycho
[DEBUG] C:\Projects\TreeAge\tycho-example\bundles\.polyglot.pom.tycho
[DEBUG] Generate aggregator pom for C:\Projects\TreeAge\tycho-example\bundles\pom.tycho
[DEBUG] Adding module com.vogella.logging.config
[DEBUG] Adding module com.vogella.tycho.p2.ui
[DEBUG] Adding module com.vogella.tycho.platform
[DEBUG] Adding module com.vogella.tycho.platform.linux
[DEBUG] Adding module com.vogella.tycho.plugin1
[DEBUG] Adding module com.vogella.tycho.rcp
[DEBUG] Derived parent for path C:\Projects\TreeAge\tycho-example\bundles\com.vogella.logging.config\META-INF\.. is groupId: com.vogella.tycho, artifactId: bundles, relativePath: ..\.polyglot.pom.tycho
[DEBUG] C:\Projects\TreeAge\tycho-example\bundles\.polyglot.pom.tycho
[DEBUG] Generate aggregator pom for C:\Projects\TreeAge\tycho-example\bundles\pom.tycho
[DEBUG] Adding module com.vogella.logging.config
[DEBUG] Adding module com.vogella.tycho.p2.ui
[DEBUG] Adding module com.vogella.tycho.platform
[DEBUG] Adding module com.vogella.tycho.platform.linux
[DEBUG] Adding module com.vogella.tycho.plugin1
[DEBUG] Adding module com.vogella.tycho.rcp
[DEBUG] Derived parent for path C:\Projects\TreeAge\tycho-example\bundles\com.vogella.logging.config\META-INF\..\.polyglot.pom.tycho\.. is groupId: com.vogella.tycho, artifactId: bundles, relativePath: ..\.polyglot.pom.tycho
[DEBUG] C:\Projects\TreeAge\tycho-example\bundles\.polyglot.pom.tycho
[DEBUG] Generate aggregator pom for C:\Projects\TreeAge\tycho-example\bundles\pom.tycho
[DEBUG] Adding module com.vogella.logging.config
[DEBUG] Adding module com.vogella.tycho.p2.ui
[DEBUG] Adding module com.vogella.tycho.platform
[DEBUG] Adding module com.vogella.tycho.platform.linux
[DEBUG] Adding module com.vogella.tycho.plugin1
[DEBUG] Adding module com.vogella.tycho.rcp
[DEBUG] Derived parent for path C:\Projects\TreeAge\tycho-example\bundles\com.vogella.logging.config\META-INF\..\.polyglot.pom.tycho\..\.polyglot.pom.tycho\.. is groupId: com.vogella.tycho, artifactId: bundles, relativePath: ..\.polyglot.pom.tycho
[DEBUG] C:\Projects\TreeAge\tycho-example\bundles\.polyglot.pom.tycho
[DEBUG] Generate aggregator pom for C:\Projects\TreeAge\tycho-example\bundles\pom.tycho
[DEBUG] Adding module com.vogella.logging.config
[DEBUG] Adding module com.vogella.tycho.p2.ui
[DEBUG] Adding module com.vogella.tycho.platform
[DEBUG] Adding module com.vogella.tycho.platform.linux
[DEBUG] Adding module com.vogella.tycho.plugin1
[DEBUG] Adding module com.vogella.tycho.rcp
[DEBUG] Derived parent for path C:\Projects\TreeAge\tycho-example\bundles\com.vogella.logging.config\META-INF\..\.polyglot.pom.tycho\..\.polyglot.pom.tycho\..\.polyglot.pom.tycho\.. is groupId: com.vogella.tycho, artifactId: bundles, relativePath: ..\.polyglot.pom.tycho
[DEBUG] C:\Projects\TreeAge\tycho-example\bundles\.polyglot.pom.tycho
[DEBUG] Generate aggregator pom for C:\Projects\TreeAge\tycho-example\bundles\pom.tycho
[DEBUG] Adding module com.vogella.logging.config
[DEBUG] Adding module com.vogella.tycho.p2.ui
[DEBUG] Adding module com.vogella.tycho.platform
[DEBUG] Adding module com.vogella.tycho.platform.linux
[DEBUG] Adding module com.vogella.tycho.plugin1
[DEBUG] Adding module com.vogella.tycho.rcp
[DEBUG] Derived parent for path C:\Projects\TreeAge\tycho-example\bundles\com.vogella.logging.config\META-INF\..\.polyglot.pom.tycho\..\.polyglot.pom.tycho\..\.polyglot.pom.tycho\..\.polyglot.pom.tycho\.. is groupId: com.vogella.tycho, artifactId: bundles, relativePath: ..\.polyglot.pom.tycho
[DEBUG] C:\Projects\TreeAge\tycho-example\bundles\.polyglot.pom.tycho
...