Often in a code review I’ll point out that public signatures are being changed, and we can’t do that in a minor release. Then the author will reply that it’s OK because it’s an internal only API, or an impl API, or both so it’s OK. No one is depending on it. And then this happens:

Error:  Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.14.0:compile (default-compile) on project mvnd-daemon: Compilation failure
Error:  /Users/runner/work/maven-mvnd/maven-mvnd/daemon/src/main/java/org/mvndaemon/mvnd/syncontext/DaemonNamedLockFactoryAdapterFactoryImpl.java:[48,9] no suitable constructor found for NamedLockFactoryAdapterFactoryImpl(java.util.Map,java.lang.String,java.util.Map,java.lang.String,org.eclipse.aether.impl.RepositorySystemLifecycle)
Error:      constructor org.eclipse.aether.internal.impl.synccontext.named.NamedLockFactoryAdapterFactoryImpl.NamedLockFactoryAdapterFactoryImpl(java.util.Map,java.util.Map,java.util.Map,org.eclipse.aether.impl.RepositorySystemLifecycle) is not applicable
Error:        (actual and formal argument lists differ in length)
Error:      constructor org.eclipse.aether.internal.impl.synccontext.named.NamedLockFactoryAdapterFactoryImpl.NamedLockFactoryAdapterFactoryImpl(java.util.Map,java.lang.String,java.util.Map,java.lang.String,java.util.Map,org.eclipse.aether.impl.RepositorySystemLifecycle) is not applicable
Error:        (actual and formal argument lists differ in length)
Error:  -> [Help 1]

Hyrum’s Law applies. From JLBP-3:

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