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-rw-r--r--lib/compiler/test/receive_SUITE.erl53
1 files changed, 51 insertions, 2 deletions
diff --git a/lib/compiler/test/receive_SUITE.erl b/lib/compiler/test/receive_SUITE.erl
index 4219768d6f..0038eb1a4b 100644
--- a/lib/compiler/test/receive_SUITE.erl
+++ b/lib/compiler/test/receive_SUITE.erl
@@ -25,7 +25,8 @@
init_per_group/2,end_per_group/2,
init_per_testcase/2,end_per_testcase/2,
export/1,recv/1,coverage/1,otp_7980/1,ref_opt/1,
- wait/1,recv_in_try/1,double_recv/1]).
+ wait/1,recv_in_try/1,double_recv/1,receive_var_zero/1,
+ match_built_terms/1]).
-include_lib("common_test/include/ct.hrl").
@@ -45,7 +46,8 @@ all() ->
groups() ->
[{p,test_lib:parallel(),
[recv,coverage,otp_7980,ref_opt,export,wait,
- recv_in_try,double_recv]}].
+ recv_in_try,double_recv,receive_var_zero,
+ match_built_terms]}].
init_per_suite(Config) ->
@@ -378,4 +380,51 @@ do_double_recv(_, Msg) ->
error
end.
+%% Test 'after Z', when Z =:= 0 been propagated as an immediate by the type
+%% optimization pass.
+receive_var_zero(Config) when is_list(Config) ->
+ self() ! x,
+ self() ! y,
+ Z = zero(),
+ timeout = receive
+ z -> ok
+ after Z -> timeout
+ end,
+ timeout = receive
+ after Z -> timeout
+ end,
+ self() ! w,
+ receive
+ x -> ok;
+ Other ->
+ ct:fail({bad_message,Other})
+ end.
+
+zero() -> 0.
+
+%% ERL-862; the validator would explode when a term was constructed in a
+%% receive guard.
+
+-define(MATCH_BUILT_TERM(Ref, Expr),
+ (fun() ->
+ Ref = make_ref(),
+ A = id($a),
+ B = id($b),
+ Built = id(Expr),
+ self() ! {Ref, A, B},
+ receive
+ {Ref, A, B} when Expr =:= Built ->
+ ok
+ after 5000 ->
+ ct:fail("Failed to match message with term built in "
+ "receive guard.")
+ end
+ end)()).
+
+match_built_terms(Config) when is_list(Config) ->
+ ?MATCH_BUILT_TERM(Ref, [A, B]),
+ ?MATCH_BUILT_TERM(Ref, {A, B}),
+ ?MATCH_BUILT_TERM(Ref, <<A, B>>),
+ ?MATCH_BUILT_TERM(Ref, #{ 1 => A, 2 => B}).
+
id(I) -> I.