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-rw-r--r--lib/stdlib/test/io_SUITE.erl42
1 files changed, 40 insertions, 2 deletions
diff --git a/lib/stdlib/test/io_SUITE.erl b/lib/stdlib/test/io_SUITE.erl
index 65a112c966..aa698ecaa2 100644
--- a/lib/stdlib/test/io_SUITE.erl
+++ b/lib/stdlib/test/io_SUITE.erl
@@ -29,7 +29,8 @@
manpage/1, otp_6708/1, otp_7084/1, otp_7421/1,
io_lib_collect_line_3_wb/1, cr_whitespace_in_string/1,
io_fread_newlines/1, otp_8989/1, io_lib_fread_literal/1,
- io_lib_print_binary_depth_one/1, otp_10302/1, otp_10836/1]).
+ io_lib_print_binary_depth_one/1, otp_10302/1, otp_10755/1,
+ otp_10836/1]).
%-define(debug, true).
@@ -65,7 +66,7 @@ all() ->
manpage, otp_6708, otp_7084, otp_7421,
io_lib_collect_line_3_wb, cr_whitespace_in_string,
io_fread_newlines, otp_8989, io_lib_fread_literal,
- io_lib_print_binary_depth_one, otp_10302, otp_10836].
+ io_lib_print_binary_depth_one, otp_10302, otp_10755, otp_10836].
groups() ->
[].
@@ -2085,3 +2086,40 @@ otp_10836(Suite) when is_list(Suite) ->
S = io_lib:format("~ts", [[<<"äpple"/utf8>>, <<"äpple">>]]),
"äppleäpple" = lists:flatten(S),
ok.
+
+otp_10755(doc) ->
+ "OTP-10755. The 'l' modifier";
+otp_10755(Suite) when is_list(Suite) ->
+ S = "string",
+ "\"string\"" = fmt("~p", [S]),
+ "[115,116,114,105,110,103]" = fmt("~lp", [S]),
+ "\"string\"" = fmt("~P", [S, 2]),
+ "[115|...]" = fmt("~lP", [S, 2]),
+ {'EXIT',{badarg,_}} = (catch fmt("~ltp", [S])),
+ {'EXIT',{badarg,_}} = (catch fmt("~tlp", [S])),
+ {'EXIT',{badarg,_}} = (catch fmt("~ltP", [S])),
+ {'EXIT',{badarg,_}} = (catch fmt("~tlP", [S])),
+ Text =
+ "-module(l_mod).\n"
+ "-export([t/0]).\n"
+ "t() ->\n"
+ " S = \"string\",\n"
+ " io:format(\"~ltp\", [S]),\n"
+ " io:format(\"~tlp\", [S]),\n"
+ " io:format(\"~ltP\", [S, 1]),\n"
+ " io:format(\"~tlP\", [S, 1]).\n",
+ {ok,l_mod,[{_File,Ws}]} = compile_file("l_mod.erl", Text, Suite),
+ ["format string invalid (invalid control ~lt)",
+ "format string invalid (invalid control ~tl)",
+ "format string invalid (invalid control ~lt)",
+ "format string invalid (invalid control ~tl)"] =
+ [lists:flatten(M:format_error(E)) || {_L,M,E} <- Ws],
+ ok.
+
+compile_file(File, Text, Config) ->
+ PrivDir = ?privdir(Config),
+ Fname = filename:join(PrivDir, File),
+ ok = file:write_file(Fname, Text),
+ try compile:file(Fname, [return])
+ after ok %file:delete(Fname)
+ end.