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-rw-r--r--lib/stdlib/src/io_lib_pretty.erl12
-rw-r--r--lib/stdlib/test/io_SUITE.erl10
2 files changed, 17 insertions, 5 deletions
diff --git a/lib/stdlib/src/io_lib_pretty.erl b/lib/stdlib/src/io_lib_pretty.erl
index dca1b37ef3..ba9d9e8434 100644
--- a/lib/stdlib/src/io_lib_pretty.erl
+++ b/lib/stdlib/src/io_lib_pretty.erl
@@ -722,7 +722,7 @@ printable_list(L, _D, T, latin1) when T < 0 ->
io_lib:printable_latin1_list(L);
printable_list(L, _D, T, Enc) when T >= 0 ->
case slice(L, tsub(T, 2)) of
- {prefix, ""} ->
+ false ->
false;
{prefix, Prefix} when Enc =:= latin1 ->
io_lib:printable_latin1_list(Prefix) andalso {true, Prefix};
@@ -738,11 +738,17 @@ printable_list(L, _D, T, _Uni) when T < 0->
io_lib:printable_list(L).
slice(L, N) ->
- case string:length(L) =< N of
+ try string:length(L) =< N of
true ->
all;
false ->
- {prefix, string:slice(L, 0, N)}
+ case string:slice(L, 0, N) of
+ "" ->
+ false;
+ Prefix ->
+ {prefix, Prefix}
+ end
+ catch _:_ -> false
end.
printable_bin0(Bin, D, T, Enc) ->
diff --git a/lib/stdlib/test/io_SUITE.erl b/lib/stdlib/test/io_SUITE.erl
index 91fe1133f6..79cee54335 100644
--- a/lib/stdlib/test/io_SUITE.erl
+++ b/lib/stdlib/test/io_SUITE.erl
@@ -31,7 +31,8 @@
otp_10836/1, io_lib_width_too_small/1,
io_with_huge_message_queue/1, format_string/1,
maps/1, coverage/1, otp_14178_unicode_atoms/1, otp_14175/1,
- otp_14285/1, limit_term/1, otp_14983/1, otp_15103/1]).
+ otp_14285/1, limit_term/1, otp_14983/1, otp_15103/1,
+ otp_15159/1]).
-export([pretty/2, trf/3]).
@@ -63,7 +64,7 @@ all() ->
io_lib_print_binary_depth_one, otp_10302, otp_10755, otp_10836,
io_lib_width_too_small, io_with_huge_message_queue,
format_string, maps, coverage, otp_14178_unicode_atoms, otp_14175,
- otp_14285, limit_term, otp_14983, otp_15103].
+ otp_14285, limit_term, otp_14983, otp_15103, otp_15159].
%% Error cases for output.
error_1(Config) when is_list(Config) ->
@@ -2633,3 +2634,8 @@ otp_15103(_Config) ->
"[{a,\n b,\n c},\n {a,\n b,...},\n {a,...},\n {...}|...]" =
lists:flatten(S5),
ok.
+
+otp_15159(_Config) ->
+ "[atom]" =
+ lists:flatten(io_lib:format("~p", [[atom]], [{chars_limit,5}])),
+ ok.