Warning 'Can't create array of wildcard' with stacktrace when compiling

[loicmathieu]

Expected Behavior

No warning is displayed

Actual Behaviour

There is a warning Can't create array of wildcard with a big stacktrace when compiling a Micronaut application.

warning: Error with getting properties for class java.lang.Class: java.lang.UnsupportedOperationException: Can't create array of wildcard
  Can't create array of wildcard
> Task :webserver:compileJava
  java.lang.UnsupportedOperationException: Can't create array of wildcard
  	at io.micronaut.annotation.processing.visitor.JavaWildcardElement.withArrayDimensions(JavaWildcardElement.java:125)
  	at io.micronaut.inject.ast.ArrayableClassElement.toArray(ArrayableClassElement.java:27)
  	at io.micronaut.annotation.processing.visitor.AbstractJavaElement.newClassElement(AbstractJavaElement.java:282)
  	at io.micronaut.annotation.processing.visitor.AbstractJavaElement.newClassElement(AbstractJavaElement.java:213)
  	at io.micronaut.annotation.processing.visitor.AbstractJavaElement.newClassElement(AbstractJavaElement.java:191)
  	at io.micronaut.annotation.processing.visitor.JavaMethodElement.returnType(JavaMethodElement.java:340)
  	at io.micronaut.annotation.processing.visitor.JavaMethodElement.getGenericReturnType(JavaMethodElement.java:210)
  	at io.micronaut.inject.ast.utils.AstBeanPropertiesUtils.processGetter(AstBeanPropertiesUtils.java:244)
  	at io.micronaut.inject.ast.utils.AstBeanPropertiesUtils.resolveBeanProperties(AstBeanPropertiesUtils.java:105)
  	at io.micronaut.annotation.processing.visitor.JavaClassElement.getBeanProperties(JavaClassElement.java:343)
  	at io.micronaut.annotation.processing.visitor.JavaClassElement.getBeanProperties(JavaClassElement.java:298)
  	at io.micronaut.openapi.visitor.AbstractOpenApiVisitor.populateSchemaProperties(AbstractOpenApiVisitor.java:2455)
  	at io.micronaut.openapi.visitor.AbstractOpenApiVisitor.getSchemaDefinition(AbstractOpenApiVisitor.java:1966)
  	at io.micronaut.openapi.visitor.AbstractOpenApiVisitor.resolveSchema(AbstractOpenApiVisitor.java:983)
  	at io.micronaut.openapi.visitor.AbstractOpenApiVisitor.resolveSchema(AbstractOpenApiVisitor.java:927)

Complete stacktrace: warning-micronaut-compile.txt

Steps To Reproduce

No response

Environment Information

No response

Example Application

No response

Version

4.3.4

[dstepanov]

Can you please provide a sample app?

[loicmathieu]

This is the method that trigger the exception:

@Slf4j
@Validated
@Controller("/api/v1/executions")
public class ExecutionController {

    @Delete(uri = "/by-ids")
    @ExecuteOn(TaskExecutors.IO)
    @Operation(tags = {"Executions"}, summary = "Delete a list of executions")
    @ApiResponse(responseCode = "200", description = "On success", content = {@Content(schema = @Schema(implementation = BulkResponse.class))})
    @ApiResponse(responseCode = "422", description = "Deleted with errors", content = {@Content(schema = @Schema(implementation = BulkErrorResponse.class))})
    public MutableHttpResponse<?> deleteByIds(
        @Parameter(description = "The execution id") @Body List<String> executionsId,
        @Parameter(description = "Specificies whether to delete non-terminated executions") @Nullable @QueryValue(defaultValue = "false") boolean includeNonTerminated
    ) {
        List<Execution> executions = new ArrayList<>();
        Set<ManualConstraintViolation<String>> invalids = new HashSet<>();

        for (String executionId : executionsId) {
            Optional<Execution> execution = executionRepository.findById(tenantService.resolveTenant(), executionId);
            if (execution.isPresent() && (execution.get().getState().isTerminated() || includeNonTerminated)) {
                executions.add(execution.get());
            } else {
                invalids.add(ManualConstraintViolation.of(
                    "execution not found",
                    executionId,
                    String.class,
                    "execution",
                    executionId
                ));
            }
        }
        if (!invalids.isEmpty()) {
            return HttpResponse.badRequest()
                .body(BulkErrorResponse
                    .builder()
                    .message("invalid bulk delete")
                    .invalids(invalids)
                    .build()
                );
        }

        executions
            .forEach(execution -> executionRepository.delete(execution));

        return HttpResponse.ok(BulkResponse.builder().count(executions.size()).build());
    }
}

Sorry, I didn't have the time to create a reproducer project but the issue is trigger by the compilation of this method in this class.