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-rw-r--r--src/boot/me/semant.ml3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/boot/me/semant.ml b/src/boot/me/semant.ml
index 63b52445..6fb6a580 100644
--- a/src/boot/me/semant.ml
+++ b/src/boot/me/semant.ml
@@ -1005,7 +1005,8 @@ let rec pretty_ty_str (cx:ctxt) (fallback:(Ast.ty -> string)) (ty:Ast.ty) =
let fn_args_str = String.concat ", " (Array.to_list fn_args) in
let fn_rv_str = format_slot fnsig.Ast.sig_output_slot in
Printf.sprintf "fn(%s) -> %s" fn_args_str fn_rv_str
- | Ast.TY_tag { Ast.tag_id = tag_id; Ast.tag_args = args } ->
+ | Ast.TY_tag { Ast.tag_id = tag_id; Ast.tag_args = args }
+ when Hashtbl.mem cx.ctxt_all_tag_info tag_id ->
let tag_info = Hashtbl.find cx.ctxt_all_tag_info tag_id in
let tag_idents = tag_info.tag_idents in
let item_id = ref None in