From 440f1cb081c0947ba3ba8b00b33f4dcc74bafe98 Mon Sep 17 00:00:00 2001
From: alex <alex@slab.org>
Date: Thu, 19 Jun 2025 08:27:23 +0100
Subject: [PATCH] reify arguments of stepcat

---
 packages/core/pattern.mjs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/packages/core/pattern.mjs b/packages/core/pattern.mjs
index 76b02c21e..59833aea7 100644
--- a/packages/core/pattern.mjs
+++ b/packages/core/pattern.mjs
@@ -2720,6 +2720,7 @@ export function stepcat(...timepats) {
     return nothing;
   }
   const findsteps = (x) => (Array.isArray(x) ? x : [x._steps, x]);
+  timepats = timepats.map(reify);
   timepats = timepats.map(findsteps);
   if (timepats.find((x) => x[0] === undefined)) {
     const times = timepats.map((a) => a[0]).filter((x) => x !== undefined);