diff options
| -rw-r--r-- | src/data/things/composite.js | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/src/data/things/composite.js b/src/data/things/composite.js index c3b08f86..113f0a4f 100644 --- a/src/data/things/composite.js +++ b/src/data/things/composite.js @@ -637,6 +637,10 @@ export function compositeFrom(description) { const compositionNests = description.compose ?? true; + if (compositionNests && empty(steps)) { + aggregate.push(new TypeError(`Expected at least one step`)); + } + // Steps default to exposing if using a shorthand syntax where flags aren't // specified at all. const stepsExpose = |