Rikkola opened a new issue, #7102:
URL: https://github.com/apache/incubator-kie/issues/7102
### Describe the bug
`.bind(...)` variables inside a sequence → `NullPointerException` in RHS
```java
Variable<String> toyName = declarationOf(String.class);
sequence(
pattern(toy)
.expr("ball", t -> t.getName().equals("ball"))
.bind(toyName, Toy::getName)
),
on(toyName).execute(name -> results.add(name))
```
`buildStepGate()` records only `patternImpl.getPatternVariable()` in
`sequenceVarIndexes`; variables from `.bind(...)` are not recorded and are
absent from the activation tuple too, so the consequence fails with:
```
NullPointerException: Cannot invoke "Declaration.getTupleIndex()" because
"declaration" is null
```
Since the API accepts a full `PatternDef` as a `SequenceStep`, its bindings
should work. If that's intentionally unsupported, `.bind(...)` should be
rejected during model construction or compilation.
**Relevant code:**
- `KiePackagesBuilder.java:627-632`
- `LambdaConsequence.java:251-258`
### Expected behavior
_No response_
### Actual behavior
_No response_
### How to Reproduce?
_No response_
### Output of `uname -a` or `ver`
_No response_
### Output of `java -version`
_No response_
### GraalVM version (if different from Java)
_No response_
### Kogito version or git rev (or at least Quarkus version if you are using
Kogito via Quarkus platform BOM)
_No response_
### Build tool (ie. output of `mvnw --version` or `gradlew --version`)
_No response_
### Additional information
_No response_
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