3 files changed, 21 insertions, 5 deletions
diff --git a/lib/compiler/test/bs_match_SUITE.erl b/lib/compiler/test/bs_match_SUITE.erl
index a19b152bc5..d8bef18a1a 100644
--- a/lib/compiler/test/bs_match_SUITE.erl
+++ b/lib/compiler/test/bs_match_SUITE.erl
@@ -116,9 +116,16 @@ fun_shadow_4(L) ->
 
 int_float(Config) when is_list(Config) ->
     %% OTP-5323
-    ?line <<103133.0:64/float>> = <<103133:64/float>>,
-    ?line <<103133:64/float>> = <<103133:64/float>>,
-    ok.
+    <<103133.0:64/float>> = <<103133:64/float>>,
+    <<103133:64/float>> = <<103133:64/float>>,
+
+    %% Coverage of error cases in sys_pre_expand:coerce_to_float/2.
+    case id(default) of
+	<<(1 bsl 1024):64/float>> ->
+	    ?t:fail();
+	default ->
+	    ok
+    end.
 
 %% Stolen from erl_eval_SUITE and modified.
 %% OTP-5269. Bugs in the bit syntax.
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.
diff --git a/lib/compiler/test/misc_SUITE.erl b/lib/compiler/test/misc_SUITE.erl
index b88abaf62d..c7c20fdbf2 100644
--- a/lib/compiler/test/misc_SUITE.erl
+++ b/lib/compiler/test/misc_SUITE.erl
@@ -38,7 +38,11 @@
 -compile({no_auto_import,[byte_size/1]}).
 -import(erlang,[byte_size/1]).
 
-
+%% Cover the code for callback handling.
+-callback must_define_this_one() -> 'ok'.
+-callback do_something_strange(atom()) -> 'ok'.
+-optional_callbacks([do_something_strange/1]).
+-optional_callbacks([ignore_me]).		%Invalid; ignored.
 
 %% Include an opaque declaration to cover the stripping of
 %% opaque types from attributes in v3_kernel.