gnodet opened a new issue, #12305:
URL: https://github.com/apache/maven/issues/12305
## Description
Building any of the Apache Causeway sample applications with Maven from the
`maven-4.0.x` branch fails with `Invalid Collect Request: null` during
dependency resolution. The builds succeed with Maven 3.x.
## Error
```
[ERROR] Invalid Collect Request: null ->
[org.apache.causeway.core:causeway-applib:jar:3.6.0 (compile),
org.apache.causeway.testing:causeway-testing-fakedata-applib:jar:3.6.0
(compile),
...
org.springframework.boot:spring-boot-configuration-processor:jar:3.5.13
(compile?),
org.projectlombok:lombok:jar:1.18.44 (provided)]
< [central (https://repo.maven.apache.org/maven2, default, releases),
staging (https://repository.apache.org/content/groups/staging/,
default, releases+snapshots)]
```
The `null` in "Invalid Collect Request: null" suggests the dependency
collector is returning null somewhere internally.
Note the `(compile?)` scope annotation on
`spring-boot-configuration-processor` — the question mark may indicate scope
uncertainty in the resolver.
## Affected projects
- `causeway-app-helloworld` (3.6.0)
- `causeway-app-petclinic` (2.0.0)
- `causeway-app-simpleapp` (3.6.0)
All three use repositories declared in the POM (central + staging).
## Reproducer
```bash
git clone https://github.com/apache/causeway-app-simpleapp.git
cd causeway-app-simpleapp
mvn -B -e clean package -DskipTests
```
## Environment
- Maven: built from `maven-4.0.x` branch (bootstrapped with 4.0.0-rc-5)
- JDK: 17 (Temurin)
## Context
Found during [Maven 4 compatibility
testing](https://github.com/gnodet/maven4-testing/issues/20686).
_Claude Code on behalf of Guillaume Nodet_
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