Quarkus Qute broken in 3.16

[Madere]

Describe the bug

Hi,
we used Quarkus Qute 3.15.2 and all worked fine. Since 3.16.1 we have an issue with calling a Java method. The parameter in the Java method is always the same value where in the HTML file the field has the correct value within a loop.

Html fragments:

{#for project in schedules.projects}
  {#for name in schedules.names}
    <script>console.log("Name: Project.name = [{project.name}]");</script>
    {#let schedule = schedules.forProjectAndName(project, name, project_index)}
    ........
  {/for}
{/for}

In the browser console logging, the value for project.name is correct for each project in 'schedules.projects'

Java Code:

public PipelineSchedule forProjectAndName(final Project project, final String scheduleName, final int indexCount) {
log.info("Name: Project.Name = [{}], ScheduleName = [{}], indexCount = [{}]", project.name(), scheduleName, indexCount);

The java logging shows always the first project name from the loop in the html code. Anyone an idea what is going on? And how to solve this?

Expected behavior

That the loop works the same as in Quarkus version 3.15

Actual behavior

The value of the parameter in the Java method is always of the first entry in the loop.

How to Reproduce?

No response

Output of uname -a or ver

No response

Output of java -version

No response

Quarkus version or git rev

3.15 versus 3.16

Build tool (ie. output of mvnw --version or gradlew --version)

mvn

Additional information

No response

[quarkus-bot]

/cc @mkouba (qute)

[mkouba]

Hi @Madere and thanks for the report. Would it be possible to extract the relevant code in a minimal reproducer project? It's hard to guess without something concrete in hand.

[Madere]

Hi @mkouba find attached a zip file with a short demo project. Zipfile removed.

Compiled with Java-21

usage:
java -jar target/documentation-runner.jar list-schedules

The Html ouput is in: pages/schedules.html

Screenshots:
Html Output with Quarkus 3.15.2 (correct)

Html Output with Quarkus 3.16.1 (incorrect)

[mkouba]

Hi @mkouba find attached a zip file with a short demo project. Quarkus Qute issue.zip

Compiled with Java-21

usage: java -jar target/documentation-runner.jar list-schedules

The Html ouput is in: pages/schedules.html

Screenshots: Html Output with Quarkus 3.15.2 (correct)

Html Output with Quarkus 3.16.1 (incorrect)

Thanks. I'll take a look.

[mkouba]

Ok, found it. It's a regression caused by #43308.

I've sent a PR with a fix. This is the fix: https://github.com/quarkusio/quarkus/pull/44817/files#diff-172c5b92001e43b2cc32c9a8025b0730084d360fa398a1600dc4e4a8b88cc3d3R65 🤦 😦

Workarounds exists: do not use the reflection fallback value resolver, but instead:

• use type-safe templates/records/expressions (e.g. https://quarkus.io/guides/qute-reference#template-records)
• annotate the ProjectSchedules class with @TemplateData

[Madere]

Hi @mkouba , thanks.
Adding @TemplateData made it work again.
Regards,
Martin.