From daefddfc9efbfa19fb36d69d2ce8cef531a460fd Mon Sep 17 00:00:00 2001
From: Casey Rodarmor <casey@rodarmor.com>
Date: Mon, 6 Jul 2026 20:03:07 -0700
Subject: [PATCH 1/2] Don't panic when recipe with flag parameter is used as
 dependency

---
 src/recipe.rs    |  4 +++-
 tests/options.rs | 20 ++++++++++++++++++++
 2 files changed, 23 insertions(+), 1 deletion(-)

diff --git a/src/recipe.rs b/src/recipe.rs
index b2567a2476..19d114c650 100644
--- a/src/recipe.rs
+++ b/src/recipe.rs
@@ -73,7 +73,9 @@ impl<'src> Recipe<'src> {
         rest = &rest[1..];
         vec![argument.clone()]
       } else {
-        debug_assert!(parameter.default.is_some() || parameter.kind == ParameterKind::Star);
+        debug_assert!(
+          parameter.default.is_some() || parameter.kind == ParameterKind::Star || parameter.flag
+        );
         Vec::new()
       };
 
diff --git a/tests/options.rs b/tests/options.rs
index 7060b8aefe..bf0c993cb3 100644
--- a/tests/options.rs
+++ b/tests/options.rs
@@ -1283,3 +1283,23 @@ fn multiple_option_below_min_is_an_error() {
     .stderr("error: recipe `foo` parameter `bar` got 1 value but takes at least 2\n")
     .failure();
 }
+
+#[test]
+fn recipe_with_flag_parameter_may_be_used_as_dependency() {
+  Test::new()
+    .justfile(
+      "
+        set lists
+
+        [arg('bar', long, flag)]
+        @foo bar:
+          echo bar={{show(bar)}}
+
+        baz: foo
+      ",
+    )
+    .unstable()
+    .args(["baz"])
+    .stdout("bar=[]\n")
+    .success();
+}

From 7fab29933c95723b3e5799bcaaff55b56b2a1ca5 Mon Sep 17 00:00:00 2001
From: Casey Rodarmor <casey@rodarmor.com>
Date: Mon, 6 Jul 2026 20:29:11 -0700
Subject: [PATCH 2/2] Adjust

---
 src/recipe.rs | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/src/recipe.rs b/src/recipe.rs
index 19d114c650..85b2b19105 100644
--- a/src/recipe.rs
+++ b/src/recipe.rs
@@ -73,9 +73,6 @@ impl<'src> Recipe<'src> {
         rest = &rest[1..];
         vec![argument.clone()]
       } else {
-        debug_assert!(
-          parameter.default.is_some() || parameter.kind == ParameterKind::Star || parameter.flag
-        );
         Vec::new()
       };