1 files changed, 6 insertions, 0 deletions
diff --git a/src/exec.zig b/src/exec.zig
index 5a421f19..215a4fd1 100644
--- a/src/exec.zig
+++ b/src/exec.zig
@@ -959,6 +959,12 @@ pub fn runBuiltinFrom(p: *Pardes, b: Builtin, id: usize, txt: []const u8, arg: ?
         p.fs.unlogged = false;
         pane.msg_announcement = true;
     }
+    // A word for one kind of pane, on another: refused with why, not a
+    // silent nothing (Palette on a file, Filter on a PDF).
+    if (builtins.registry.needs(b)) |kind| if (p.panes[id] == null or !kind.has(pane)) {
+        var said: [96]u8 = undefined;
+        return p.reportFailure(id, std.fmt.bufPrint(&said, "{s}: only {s} pane takes it", .{ @tagName(b), kind.noun() }) catch "only another kind of pane takes it");
+    };
     const c: builtins.Ctx = .{ .p = p, .pane = pane, .id = id, .txt = txt, .arg = arg, .from_body = from_body };
     builtins.registry.dispatch(b, c);
 }