gradle/gradle · error · InvalidUserDataException

Must specify a value for incremental input property '%s'.

Error message

Must specify a value for incremental input property '%s'.

What it means

Error "Must specify a value for incremental input property '%s'." thrown in gradle/gradle.

Source

Thrown at platforms/core-execution/execution/src/main/java/org/gradle/internal/execution/steps/ResolveChangesStep.java:93

                    : nonIncremental(VALIDATION_FAILED, beforeExecution, incrementalInputProperties)
                )
                .orElseGet(() -> nonIncremental(NO_HISTORY, beforeExecution, incrementalInputProperties))
            );
    }

    private static IncrementalInputProperties createIncrementalInputProperties(MutableUnitOfWork work) {
        switch (work.getExecutionBehavior()) {
            case NON_INCREMENTAL:
                return IncrementalInputProperties.NONE;
            case INCREMENTAL:
                ImmutableBiMap.Builder<String, Object> builder = ImmutableBiMap.builder();
                InputVisitor visitor = new InputVisitor() {
                    @Override
                    public void visitInputFileProperty(String propertyName, InputBehavior behavior, InputFileValueSupplier valueSupplier) {
                        if (behavior.shouldTrackChanges()) {
                            Object value = valueSupplier.getValue();
                            if (value == null) {
                                throw new InvalidUserDataException("Must specify a value for incremental input property '" + propertyName + "'.");
                            }
                            builder.put(propertyName, value);
                        }
                    }
                };
                work.visitImmutableInputs(visitor);
                work.visitMutableInputs(visitor);
                return new DefaultIncrementalInputProperties(builder.build());
            default:
                throw new AssertionError();
        }
    }
}

View on GitHub (pinned to 534f27719b)

Solutions

1. An incremental input property has no value. Set a value for the named property before executing the task.

When it happens

Trigger: Thrown at platforms/core-execution/execution/src/main/java/org/gradle/internal/execution/steps/ResolveChangesStep.java:93 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of gradle/gradle@534f27719b (2026-08-22). Data as JSON: /api/errors/a061e5a8852e06a8. Report an issue: GitHub.