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-rw-r--r--lib/dialyzer/src/dialyzer_contracts.erl11
-rw-r--r--lib/dialyzer/test/small_SUITE_data/src/loopy.erl17
2 files changed, 24 insertions, 4 deletions
diff --git a/lib/dialyzer/src/dialyzer_contracts.erl b/lib/dialyzer/src/dialyzer_contracts.erl
index d1ffa07706..272ad10e90 100644
--- a/lib/dialyzer/src/dialyzer_contracts.erl
+++ b/lib/dialyzer/src/dialyzer_contracts.erl
@@ -591,10 +591,13 @@ remove_uses([{Var, Use}|ToRemove], Constrs0) ->
remove_uses(_Var, _Use, []) -> [];
remove_uses(Var, Use, [Constr|Constrs]) ->
{V, Form} = Constr,
- case erl_types:t_var_name(V) =:= Var of
- true -> [{V, remove_use(Form, Use)}|Constrs];
- false -> [Constr|remove_uses(Var, Use, Constrs)]
- end.
+ NewConstr = case erl_types:t_var_name(V) =:= Var of
+ true ->
+ {V, remove_use(Form, Use)};
+ false ->
+ Constr
+ end,
+ [NewConstr|remove_uses(Var, Use, Constrs)].
remove_use({var, L, V}, V) -> {var, L, '_'};
remove_use(T, V) when is_tuple(T) ->
diff --git a/lib/dialyzer/test/small_SUITE_data/src/loopy.erl b/lib/dialyzer/test/small_SUITE_data/src/loopy.erl
new file mode 100644
index 0000000000..28125ec3d9
--- /dev/null
+++ b/lib/dialyzer/test/small_SUITE_data/src/loopy.erl
@@ -0,0 +1,17 @@
+%% ERL-157, OTP-13653.
+%% Would cause Dialyzer to go into an infinite loop.
+
+-module(loopy).
+
+-export([loop/1]).
+
+
+-spec loop(Args) -> ok when
+ Args :: [{Module, Args}],
+ Module :: module(),
+ Args :: any().
+loop([{Module, Args} | Rest]) ->
+ Module:init(Args),
+ loop(Rest);
+loop([]) ->
+ ok.