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-rw-r--r--src/urweb.grm3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/urweb.grm b/src/urweb.grm
index 7ec580f3..1a9eb855 100644
--- a/src/urweb.grm
+++ b/src/urweb.grm
@@ -1462,6 +1462,9 @@ xmlOne : NOTAGS (EApp ((EVar (["Basis"], "cdata", Infer)
NONE => (EVar (["Basis"], "None", Infer), pos)
| SOME c => (EApp ((EVar (["Basis"], "Some", Infer), pos), c), pos)), pos)
in
+ case #3 tag of
+ NONE => ()
+ | SOME _ => ErrorMsg.errorAt pos "<form> does not support 'dynClass' attribute";
(EApp (e, xmlOpt), pos)
end
else if et = "subform" orelse et = "subforms" then