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-rw-r--r--lib/stdlib/src/ms_transform.erl2
-rw-r--r--lib/stdlib/test/ms_transform_SUITE.erl2
2 files changed, 4 insertions, 0 deletions
diff --git a/lib/stdlib/src/ms_transform.erl b/lib/stdlib/src/ms_transform.erl
index c0eea652e7..98745b13f3 100644
--- a/lib/stdlib/src/ms_transform.erl
+++ b/lib/stdlib/src/ms_transform.erl
@@ -451,6 +451,8 @@ check_type(_,[{record,_,_,_}],ets) ->
ok;
check_type(_,[{cons,_,_,_}],dbg) ->
ok;
+check_type(_,[{nil,_}],dbg) ->
+ ok;
check_type(Line0,[{match,_,{var,_,_},X}],Any) ->
check_type(Line0,[X],Any);
check_type(Line0,[{match,_,X,{var,_,_}}],Any) ->
diff --git a/lib/stdlib/test/ms_transform_SUITE.erl b/lib/stdlib/test/ms_transform_SUITE.erl
index 1c5faa960b..f35013b1b2 100644
--- a/lib/stdlib/test/ms_transform_SUITE.erl
+++ b/lib/stdlib/test/ms_transform_SUITE.erl
@@ -296,6 +296,8 @@ basic_dbg(Config) when is_list(Config) ->
compile_and_run(<<"dbg:fun2ms(fun([A,B]) -> bindings() end)">>),
[{['$1','$2'],[],['$_']}] =
compile_and_run(<<"dbg:fun2ms(fun([A,B]) -> object() end)">>),
+ [{[],[],[{return_trace}]}] =
+ compile_and_run(<<"dbg:fun2ms(fun([]) -> return_trace() end)">>),
ok.
%% Test calling of ets/dbg:fun2ms from the shell.