1 files changed, 10 insertions, 0 deletions
diff --git a/src/ninep/addr.zig b/src/ninep/addr.zig
index 09ef2b66..f60c07b1 100644
--- a/src/ninep/addr.zig
+++ b/src/ninep/addr.zig
@@ -377,6 +377,16 @@ test "an address is evaluated from the current one, as acme's are" {
     try testing.expectEqualStrings(e_order, th.wr(q, qaddr, "/a/,/b/").reply.ename);
 }
 
+test "a pattern with a newline and an anchor mvzr would misread is refused EINVAL, by addr and by Edit" {
+    const p = try th.withFile(testing.allocator, "a\nfoo\n");
+    defer p.deinit();
+    const r = th.wr(p, Node.of(th.serialOf(p), .addr), "/(^|\\n)foo/");
+    try testing.expectEqual(E.INVAL, r.errno());
+    try testing.expectEqualStrings(regexp_.Regex.e_anchor, r.reply.ename);
+    const e = th.wr(p, Node.of(th.serialOf(p), .ctl), "Edit ,x/(^|\\n)foo/d\n");
+    try testing.expectEqual(E.INVAL, e.errno());
+}
+
 test "a row's range, L:C-L2:C2 or L:C-C2, is an address through its last character" {
     const p = try th.withFile(testing.allocator, "one\ntwo three\nfour\n");
     defer p.deinit();