From 2ed4212c760701e308dcf6c740720d18e8f2dbf1 Mon Sep 17 00:00:00 2001
From: Naim A <227396+naim94a@users.noreply.github.com>
Date: Thu, 30 Mar 2023 00:07:08 +0300
Subject: [PATCH] bail! when #symbol is called without parameters (#440)

---
 library/src/compute/construct.rs | 3 +++
 tests/typ/compute/construct.typ  | 4 ++++
 2 files changed, 7 insertions(+)

diff --git a/library/src/compute/construct.rs b/library/src/compute/construct.rs
index a30faf2ea..04195f421 100644
--- a/library/src/compute/construct.rs
+++ b/library/src/compute/construct.rs
@@ -258,6 +258,9 @@ pub fn symbol(
     variants: Vec<Spanned<Variant>>,
 ) -> Value {
     let mut list = Vec::new();
+    if variants.is_empty() {
+        bail!(args.span, "expected at least one variant");
+    }
     for Spanned { v, span } in variants {
         if list.iter().any(|(prev, _)| &v.0 == prev) {
             bail!(span, "duplicate variant");
diff --git a/tests/typ/compute/construct.typ b/tests/typ/compute/construct.typ
index dc1467194..ee0a24b07 100644
--- a/tests/typ/compute/construct.typ
+++ b/tests/typ/compute/construct.typ
@@ -57,6 +57,10 @@
 #envelope.lightning
 #envelope.fly
 
+---
+// Error: 8-10 expected at least one variant
+#symbol()
+
 ---
 // Test conversion to string.
 #test(str(123), "123")