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-rw-r--r--lib/observer/src/cdv_bin_cb.erl2
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/observer/src/cdv_bin_cb.erl b/lib/observer/src/cdv_bin_cb.erl
index 5502869973..a4a542297c 100644
--- a/lib/observer/src/cdv_bin_cb.erl
+++ b/lib/observer/src/cdv_bin_cb.erl
@@ -71,6 +71,8 @@ hex_binary_fun(Bin) ->
plain_html(io_lib:format("~s",[S]))
end.
+format_hex(<<>>,_) ->
+ [];
format_hex(<<B1:4,B2:4>>,_) ->
[integer_to_list(B1,16),integer_to_list(B2,16)];
format_hex(<<B1:4,B2:4,Bin/binary>>,0) ->