1 files changed, 15 insertions, 0 deletions
diff --git a/src/ninep/ctl.zig b/src/ninep/ctl.zig
index 76f09084..d1bb5907 100644
--- a/src/ninep/ctl.zig
+++ b/src/ninep/ctl.zig
@@ -1406,3 +1406,18 @@ test "Shell refuses a path that is no executable, and bare it goes back to the d
     var want: [300]u8 = undefined;
     try testing.expect(std.mem.indexOf(u8, rd(p, root_ctl, 0, 8192).bytes, try std.fmt.bufPrint(&want, "Shell {s}\n", .{config.defaultShell()})) != null);
 }
+
+test "a builtin that fails a ctl write logs only its err, so the same failure again is counted" {
+    const p = try withFile(testing.allocator, "x\n");
+    defer p.deinit();
+    p.update(.tick); // the pane's `new` is logged first
+    while (p.nextEffect()) |_| {}
+    const ctl_node = @intFromEnum(tree.TopFile.ctl);
+    for (0..3) |_| try testing.expectEqual(Status.err, wr(p, ctl_node, "Kill zzz\n").reply.status);
+    const log = @intFromEnum(tree.TopFile.log);
+    const h = call(p, .{ .tag = 1, .op = .open, .node = log }).reply.handle;
+    const text = call(p, .{ .tag = 2, .op = .read, .node = log, .handle = h, .size = 1 << 16 }).bytes;
+    try testing.expect(std.mem.endsWith(u8, text, "err - ctl: Kill: no running command has that first word \"Kill zzz\" (x3)\n"));
+    try testing.expect(std.mem.indexOf(u8, text, "msg - Kill") == null);
+    _ = call(p, .{ .tag = 3, .op = .release, .node = log, .handle = h });
+}