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-rw-r--r--lib/compiler/test/match_SUITE.erl7
1 files changed, 6 insertions, 1 deletions
diff --git a/lib/compiler/test/match_SUITE.erl b/lib/compiler/test/match_SUITE.erl
index 67d668f650..9166726aa2 100644
--- a/lib/compiler/test/match_SUITE.erl
+++ b/lib/compiler/test/match_SUITE.erl
@@ -449,7 +449,10 @@ do_map_vars_used(X, Y, Map) ->
coverage(Config) when is_list(Config) ->
%% Cover beam_dead.
ok = coverage_1(x, a),
- ok = coverage_1(x, b).
+ ok = coverage_1(x, b),
+
+ %% Cover sys_pre_expand.
+ ok = coverage_3("abc").
coverage_1(B, Tag) ->
case Tag of
@@ -460,4 +463,6 @@ coverage_1(B, Tag) ->
coverage_2(1, a, x) -> ok;
coverage_2(2, b, x) -> ok.
+coverage_3([$a]++[]++"bc") -> ok.
+
id(I) -> I.