From c53cb8cf9b446104d50f65a855684b4fe02c011e Mon Sep 17 00:00:00 2001 From: Dan Gudmundsson Date: Tue, 30 Apr 2019 12:39:24 +0200 Subject: Fix bug string:slice/3 on bad input Fixed bug in slice which wrongly could return <<>> for non-utf8 binary input. Also give a better error reason when non-utf8 binaries are given as input to some functions. --- lib/stdlib/src/string.erl | 78 ++++++++++++++++++++++-------- lib/stdlib/test/string_SUITE.erl | 63 +++++++++++++++++++++++- lib/stdlib/uc_spec/gen_unicode_mod.escript | 12 +++-- 3 files changed, 127 insertions(+), 26 deletions(-) diff --git a/lib/stdlib/src/string.erl b/lib/stdlib/src/string.erl index 1f8bdc5432..a418754caf 100644 --- a/lib/stdlib/src/string.erl +++ b/lib/stdlib/src/string.erl @@ -128,7 +128,8 @@ length(CD) -> to_graphemes(CD0) -> case unicode_util:gc(CD0) of [GC|CD] -> [GC|to_graphemes(CD)]; - [] -> [] + [] -> []; + {error, Err} -> error({badarg, Err}) end. %% Compare two strings return boolean, assumes that the input are @@ -332,7 +333,10 @@ uppercase(<>=Orig) -> catch unchanged -> Orig end; uppercase(<<>>) -> - <<>>. + <<>>; +uppercase(Bin) -> + error({badarg, Bin}). + %% Lowercase all chars in Str -spec lowercase(String::unicode:chardata()) -> unicode:chardata(). @@ -346,7 +350,10 @@ lowercase(<>=Orig) -> catch unchanged -> Orig end; lowercase(<<>>) -> - <<>>. + <<>>; +lowercase(Bin) -> + error({badarg, Bin}). + %% Make a titlecase of the first char in Str -spec titlecase(String::unicode:chardata()) -> unicode:chardata(). @@ -375,7 +382,9 @@ casefold(<>=Orig) -> catch unchanged -> Orig end; casefold(<<>>) -> - <<>>. + <<>>; +casefold(Bin) -> + error({badarg, Bin}). -spec to_integer(String) -> {Int, Rest} | {'error', Reason} when String :: unicode:chardata(), @@ -544,7 +553,8 @@ length_1([CP1|[CP2|_]=Cont], N) when ?ASCII_LIST(CP1,CP2) -> length_1(Str, N) -> case unicode_util:gc(Str) of [] -> N; - [_|Rest] -> length_1(Rest, N+1) + [_|Rest] -> length_1(Rest, N+1); + {error, Err} -> error({badarg, Err}) end. length_b(<>, CP1, N) @@ -554,7 +564,8 @@ length_b(Bin0, CP1, N) -> [_|Bin1] = unicode_util:gc([CP1|Bin0]), case unicode_util:cp(Bin1) of [] -> N+1; - [CP3|Bin] -> length_b(Bin, CP3, N+1) + [CP3|Bin] -> length_b(Bin, CP3, N+1); + {error, Err} -> error({badarg, Err}) end. equal_1([A|AR], [B|BR]) when is_integer(A), is_integer(B) -> @@ -599,7 +610,8 @@ reverse_1([CP1|[CP2|_]=Cont], Acc) when ?ASCII_LIST(CP1,CP2) -> reverse_1(CD, Acc) -> case unicode_util:gc(CD) of [GC|Rest] -> reverse_1(Rest, [GC|Acc]); - [] -> Acc + [] -> Acc; + {error, Err} -> error({badarg, Err}) end. reverse_b(<>, CP1, Acc) @@ -609,7 +621,8 @@ reverse_b(Bin0, CP1, Acc) -> [GC|Bin1] = unicode_util:gc([CP1|Bin0]), case unicode_util:cp(Bin1) of [] -> [GC|Acc]; - [CP3|Bin] -> reverse_b(Bin, CP3, [GC|Acc]) + [CP3|Bin] -> reverse_b(Bin, CP3, [GC|Acc]); + {error, Err} -> error({badarg, Err}) end. slice_l0(<>, N) when N > 0 -> @@ -622,7 +635,8 @@ slice_l([CP1|[CP2|_]=Cont], N) when ?ASCII_LIST(CP1,CP2),N > 0 -> slice_l(CD, N) when N > 0 -> case unicode_util:gc(CD) of [_|Cont] -> slice_l(Cont, N-1); - [] -> [] + [] -> []; + {error, Err} -> error({badarg, Err}) end; slice_l(Cont, 0) -> Cont. @@ -634,7 +648,8 @@ slice_lb(Bin, CP1, N) -> if N > 1 -> case unicode_util:cp(Rest) of [CP2|Cont] -> slice_lb(Cont, CP2, N-1); - [] -> <<>> + [] -> <<>>; + {error, Err} -> error({badarg, Err}) end; N =:= 1 -> Rest @@ -647,7 +662,10 @@ slice_trail(Orig, N) when is_binary(Orig) -> Sz = byte_size(Orig) - Length, <> = Orig, Keep; - _ -> <<>> + <<_, _/binary>> when N > 0 -> + error({badarg, Orig}); + _ -> + <<>> end; slice_trail(CD, N) when is_list(CD) -> slice_list(CD, N). @@ -657,7 +675,8 @@ slice_list([CP1|[CP2|_]=Cont], N) when ?ASCII_LIST(CP1,CP2),N > 0 -> slice_list(CD, N) when N > 0 -> case unicode_util:gc(CD) of [GC|Cont] -> append(GC, slice_list(Cont, N-1)); - [] -> [] + [] -> []; + {error, Err} -> error({badarg, Err}) end; slice_list(_, 0) -> []. @@ -668,7 +687,8 @@ slice_bin(CD, CP1, N) when N > 0 -> [_|Bin] = unicode_util:gc([CP1|CD]), case unicode_util:cp(Bin) of [CP2|Cont] -> slice_bin(Cont, CP2, N-1); - [] -> 0 + [] -> 0; + {error, Err} -> error({badarg, Err}) end; slice_bin(CD, CP1, 0) -> byte_size(CD)+byte_size(<>). @@ -703,14 +723,18 @@ uppercase_bin(CP1, Bin, Changed) -> [] when Changed -> [CP1]; [] -> - throw(unchanged) + throw(unchanged); + {error, Err} -> + error({badarg, Err}) end; [Char|CPs] -> case unicode_util:cp(CPs) of [Next|Rest] -> [Char|uppercase_bin(Next, Rest, true)]; [] -> - [Char] + [Char]; + {error, Err} -> + error({badarg, Err}) end end. @@ -744,14 +768,18 @@ lowercase_bin(CP1, Bin, Changed) -> [] when Changed -> [CP1]; [] -> - throw(unchanged) + throw(unchanged); + {error, Err} -> + error({badarg, Err}) end; [Char|CPs] -> case unicode_util:cp(CPs) of [Next|Rest] -> [Char|lowercase_bin(Next, Rest, true)]; [] -> - [Char] + [Char]; + {error, Err} -> + error({badarg, Err}) end end. @@ -785,14 +813,18 @@ casefold_bin(CP1, Bin, Changed) -> [] when Changed -> [CP1]; [] -> - throw(unchanged) + throw(unchanged); + {error, Err} -> + error({badarg, Err}) end; [Char|CPs] -> case unicode_util:cp(CPs) of [Next|Rest] -> [Char|casefold_bin(Next, Rest, true)]; [] -> - [Char] + [Char]; + {error, Err} -> + error({badarg, Err}) end end. @@ -1634,7 +1666,9 @@ bin_search_inv_1(<>=Bin0, Cont, Sep) -> bin_search_inv_1(<<>>, Cont, _Sep) -> {nomatch, Cont}; bin_search_inv_1([], Cont, _Sep) -> - {nomatch, Cont}. + {nomatch, Cont}; +bin_search_inv_1(Bin, _, _) -> + error({badarg, Bin}). bin_search_inv_n(<>=Bin0, Cont, Seps) -> @@ -1666,7 +1700,9 @@ bin_search_inv_n(<>=Bin0, Cont, Seps) -> bin_search_inv_n(<<>>, Cont, _Sep) -> {nomatch, Cont}; bin_search_inv_n([], Cont, _Sep) -> - {nomatch, Cont}. + {nomatch, Cont}; +bin_search_inv_n(Bin, _, _) -> + error({badarg, Bin}). bin_search_str(Bin0, Start, [], SearchCPs) -> Compiled = binary:compile_pattern(unicode:characters_to_binary(SearchCPs)), diff --git a/lib/stdlib/test/string_SUITE.erl b/lib/stdlib/test/string_SUITE.erl index 248912c3f2..c9aadd7f10 100644 --- a/lib/stdlib/test/string_SUITE.erl +++ b/lib/stdlib/test/string_SUITE.erl @@ -103,6 +103,15 @@ debug() -> test(?LINE,?FUNCTION_NAME,B,C,D, false), test(?LINE,?FUNCTION_NAME,hd(C),[B|tl(C)],D, false)). +-define(TRY(Exp), + fun() -> + try Exp + catch _E:Reason:_ST -> + %% io:format("~p:~w: ~p: ~.0p ~p~n", + %% [?FUNCTION_NAME, ?LINE,_E,Reason, hd(_ST)]), + {'EXIT', Reason} + end + end()). is_empty(_) -> ?TEST("", [], true), @@ -126,6 +135,10 @@ length(_) -> ?TEST(["abc"|<<"abc">>], [], 6), ?TEST(["abc",["def"]], [], 6), ?TEST([<<97/utf8, 778/utf8, 98/utf8>>, [776,111,776]], [], 3), %% åäö in nfd + + InvalidUTF8 = <<192,192>>, + {'EXIT', {badarg, _}} = ?TRY(string:length(InvalidUTF8)), + {'EXIT', {badarg, _}} = ?TRY(string:length(<<$a, InvalidUTF8/binary, $z>>)), ok. equal(_) -> @@ -226,6 +239,8 @@ to_graphemes(_) -> true = erlang:length(GCs) =:= erlang:length(string:to_graphemes(NFD)), true = erlang:length(GCs) =:= erlang:length(string:to_graphemes(unicode:characters_to_nfc_list(String))), + + {'EXIT', {badarg, _}} = ?TRY(string:to_graphemes(<<$a,192,192,$z>>)), ok. reverse(_) -> @@ -238,6 +253,11 @@ reverse(_) -> ?TEST(Str2, [], lists:reverse(Str2)), ?TEST(Str3, [], lists:reverse(Str3)), true = string:reverse(Str3) =:= lists:reverse(string:to_graphemes(Str3)), + + InvalidUTF8 = <<192,192>>, + {'EXIT', {badarg, _}} = ?TRY(string:reverse(InvalidUTF8)), + {'EXIT', {badarg, _}} = ?TRY(string:reverse(<<$a, InvalidUTF8/binary, $z>>)), + ok. slice(_) -> @@ -258,6 +278,14 @@ slice(_) -> ?TEST([<<"aå"/utf8>>,"äöbcd"], [3,3], "öbc"), ?TEST([<<"aåä"/utf8>>,"öbcd"], [3,10], "öbcd"), + InvalidUTF8 = <<192,192>>, + [$b, $c|InvalidUTF8] = string:slice(["abc", InvalidUTF8], 1), + InvalidUTF8 = string:slice(["abc", InvalidUTF8], 3), + {'EXIT', {badarg, _}} = ?TRY(string:slice(["abc", InvalidUTF8], 1, 5)), + BadUtf8 = <<$a, InvalidUTF8/binary, "teststring">>, + {'EXIT', {badarg, _}} = ?TRY(string:slice(BadUtf8, 2)), + {'EXIT', {badarg, _}} = ?TRY(string:slice(BadUtf8, 1, 5)), + {'EXIT', {badarg, _}} = ?TRY(string:slice(BadUtf8, 0, 5)), ok. pad(_) -> @@ -270,6 +298,10 @@ pad(_) -> ?TEST(Str, [10, trailing, $.], "Hallå....."), ?TEST(Str++["f"], [10, trailing, $.], "Hallåf...."), ?TEST(Str++[" flåwer"], [10, trailing, $.], "Hallå flåwer"), + + InvalidUTF8 = <<192,192>>, + {'EXIT', {badarg, _}} = ?TRY(string:pad(InvalidUTF8, 10, both, $.)), + {'EXIT', {badarg, _}} = ?TRY(string:pad(<<$a, InvalidUTF8/binary, $z>>, 10, both, $.)), ok. trim(_) -> @@ -300,6 +332,11 @@ trim(_) -> ?TEST([[<<"!v">>|<<204,128,$v,204,129>>]],[trailing, [[$v,769]]], [$!,$v,768]), ?TEST([[[<<"v">>|<<204,129,118,204,128,118>>],769,118,769]], [trailing, [[118,769]]], [$v,769,$v,768]), ?TEST([<<"vv">>|<<204,128,118,204,128>>], [trailing, [[118,768]]], "v"), + + InvalidUTF8 = <<192,192>>, + {'EXIT', {badarg, _}} = ?TRY(string:trim(InvalidUTF8, both, "az")), + %% Not checked (using binary search) + %% {'EXIT', {badarg, _}} = ?TRY(string:trim(<<$a, $b, InvalidUTF8/binary, $z>>, both, "az")), ok. chomp(_) -> @@ -400,6 +437,13 @@ take(_) -> ?TEST([<<"e">>,778,"åäöe", <<778/utf8>>, $e, 779], [[[$e,778]], true, trailing], {[$e,778]++"åäöe"++[778], [$e,779]}), + InvalidUTF8 = <<192,192>>, + {'EXIT', {badarg, _}} = ?TRY(string:take(InvalidUTF8, [$.], false, leading)), + %% Not checked (using binary search) + %% {'EXIT', {badarg, _}} = ?TRY(string:take(InvalidUTF8, [$.], true, leading)), + %% {'EXIT', {badarg, _}} = ?TRY(string:take(InvalidUTF8, [$.], false, trailing)), + {'EXIT', {badarg, _}} = ?TRY(string:take(InvalidUTF8, [$.], true, trailing)), + ok. @@ -416,6 +460,11 @@ uppercase(_) -> ?TEST("ljLJ", [], "LJLJ"), ?TEST("LJlj", [], "LJLJ"), ?TEST("ß sharp s", [], "SS SHARP S"), + + InvalidUTF8 = <<192,192>>, + {'EXIT', {badarg, _}} = ?TRY(string:uppercase(InvalidUTF8)), + {'EXIT', {badarg, _}} = ?TRY(string:uppercase(<<$a, InvalidUTF8/binary, $z>>)), + ok. lowercase(_) -> @@ -429,6 +478,10 @@ lowercase(_) -> ?TEST(["Mic",<<"HAŁ"/utf8>>], [], "michał"), ?TEST("ß SHARP S", [], "ß sharp s"), ?TEST("İ I WITH DOT ABOVE", [], "i̇ i with dot above"), + + InvalidUTF8 = <<192,192>>, + {'EXIT', {badarg, _}} = ?TRY(string:lowercase(InvalidUTF8)), + {'EXIT', {badarg, _}} = ?TRY(string:lowercase(<<$a, InvalidUTF8/binary, $z>>)), ok. titlecase(_) -> @@ -442,6 +495,10 @@ titlecase(_) -> ?TEST("ljLJ", [], "LjLJ"), ?TEST("LJlj", [], "Ljlj"), ?TEST("ß sharp s", [], "Ss sharp s"), + + InvalidUTF8 = <<192,192>>, + {'EXIT', {badarg, _}} = ?TRY(string:titlecase(InvalidUTF8)), + <<$A, _/binary>> = ?TRY(string:titlecase(<<$a, InvalidUTF8/binary, $z>>)), ok. casefold(_) -> @@ -456,6 +513,10 @@ casefold(_) -> ?TEST("ß SHARP S", [], "ss sharp s"), ?TEST("ẞ SHARP S", [], "ss sharp s"), ?TEST("İ I WITH DOT ABOVE", [], "i̇ i with dot above"), + + InvalidUTF8 = <<192,192>>, + {'EXIT', {badarg, _}} = ?TRY(string:casefold(InvalidUTF8)), + {'EXIT', {badarg, _}} = ?TRY(string:casefold(<<$a, InvalidUTF8/binary, $z>>)), ok. @@ -740,7 +801,7 @@ meas(Config) -> _ -> % No scaling, run at most 1.5 min Tester = spawn(Exec), receive {test_done, Tester} -> ok - after 90000 -> + after 118000 -> io:format("Timelimit reached stopping~n",[]), exit(Tester, die) end, diff --git a/lib/stdlib/uc_spec/gen_unicode_mod.escript b/lib/stdlib/uc_spec/gen_unicode_mod.escript index 8636c69a0d..f560444619 100644 --- a/lib/stdlib/uc_spec/gen_unicode_mod.escript +++ b/lib/stdlib/uc_spec/gen_unicode_mod.escript @@ -202,7 +202,8 @@ gen_static(Fd) -> io:put_chars(Fd, " {Upper,_} -> [Upper|Str];\n"), io:put_chars(Fd, " {Upper,_,_,_} -> [Upper|Str]\n"), io:put_chars(Fd, " end;\n"), - io:put_chars(Fd, " [] -> []\n"), + io:put_chars(Fd, " [] -> [];\n"), + io:put_chars(Fd, " {error,Err} -> error({badarg, Err})\n"), io:put_chars(Fd, " end.\n\n"), io:put_chars(Fd, "-spec lowercase(unicode:chardata()) -> " "maybe_improper_list(gc(),unicode:chardata()).\n"), @@ -213,7 +214,8 @@ gen_static(Fd) -> io:put_chars(Fd, " {_,Lower} -> [Lower|Str];\n"), io:put_chars(Fd, " {_,Lower,_,_} -> [Lower|Str]\n"), io:put_chars(Fd, " end;\n"), - io:put_chars(Fd, " [] -> []\n"), + io:put_chars(Fd, " [] -> [];\n"), + io:put_chars(Fd, " {error,Err} -> error({badarg, Err})\n"), io:put_chars(Fd, " end.\n\n"), io:put_chars(Fd, "-spec titlecase(unicode:chardata()) -> " "maybe_improper_list(gc(),unicode:chardata()).\n"), @@ -224,7 +226,8 @@ gen_static(Fd) -> io:put_chars(Fd, " {_,_,Title,_} -> [Title|Str];\n"), io:put_chars(Fd, " {Upper,_} -> [Upper|Str]\n"), io:put_chars(Fd, " end;\n"), - io:put_chars(Fd, " [] -> []\n"), + io:put_chars(Fd, " [] -> [];\n"), + io:put_chars(Fd, " {error,Err} -> error({badarg, Err})\n"), io:put_chars(Fd, " end.\n\n"), io:put_chars(Fd, "-spec casefold(unicode:chardata()) -> " "maybe_improper_list(gc(),unicode:chardata()).\n"), @@ -235,7 +238,8 @@ gen_static(Fd) -> io:put_chars(Fd, " {_,_,_,Fold} -> [Fold|Str];\n"), io:put_chars(Fd, " {_,Lower} -> [Lower|Str]\n"), io:put_chars(Fd, " end;\n"), - io:put_chars(Fd, " [] -> []\n"), + io:put_chars(Fd, " [] -> [];\n"), + io:put_chars(Fd, " {error,Err} -> error({badarg, Err})\n"), io:put_chars(Fd, " end.\n\n"), ok. -- cgit v1.2.3 From adfd75bfdb9724daa6cc2215d7ae84b99397e8de Mon Sep 17 00:00:00 2001 From: Dan Gudmundsson Date: Thu, 2 May 2019 07:19:26 +0200 Subject: unicode_util gc/1 Could expand binary to list for to many elements. Fix and add tests. --- lib/stdlib/test/unicode_util_SUITE.erl | 10 +++++++++- lib/stdlib/uc_spec/gen_unicode_mod.escript | 14 +++++++------- 2 files changed, 16 insertions(+), 8 deletions(-) diff --git a/lib/stdlib/test/unicode_util_SUITE.erl b/lib/stdlib/test/unicode_util_SUITE.erl index 044b4e5834..6f55f204f4 100644 --- a/lib/stdlib/test/unicode_util_SUITE.erl +++ b/lib/stdlib/test/unicode_util_SUITE.erl @@ -428,7 +428,15 @@ mode(deep_l, Bin) -> [unicode:characters_to_list(Bin)]. fetch(Str, F) -> case F(Str) of [] -> []; - [CP|R] -> [CP|fetch(R,F)] + [CP|R] -> + %% If input is a binary R should be binary + if is_binary(Str) == false -> ok; + is_binary(R); R =:= [] -> ok; + true -> + io:format("Char: ~tc Tail:~tP~n", [CP,R,10]), + exit({bug, F}) + end, + [CP|fetch(R,F)] end. %% *Test.txt file helpers diff --git a/lib/stdlib/uc_spec/gen_unicode_mod.escript b/lib/stdlib/uc_spec/gen_unicode_mod.escript index f560444619..de67b18afc 100644 --- a/lib/stdlib/uc_spec/gen_unicode_mod.escript +++ b/lib/stdlib/uc_spec/gen_unicode_mod.escript @@ -623,7 +623,7 @@ gen_gc(Fd, GBP) -> GenHangulT = fun(Range) -> io:format(Fd, "gc_1~s gc_h_T(R1,[CP]);\n", [gen_clause(Range)]) end, [GenHangulT(CP) || CP <- merge_ranges(maps:get(t,GBP))], io:put_chars(Fd, "%% Handle Hangul LV and LVT special, since they are large\n"), - io:put_chars(Fd, "gc_1([CP|_]=R0) when 44000 < CP, CP < 56000 -> gc_h_lv_lvt(R0, []);\n"), + io:put_chars(Fd, "gc_1([CP|_]=R0) when 44000 < CP, CP < 56000 -> gc_h_lv_lvt(R0, R0, []);\n"), io:put_chars(Fd, "\n%% Handle Regional\n"), GenRegional = fun(Range) -> io:format(Fd, "gc_1~s gc_regional(R1,CP);\n", [gen_clause(Range)]) end, @@ -752,7 +752,7 @@ gen_gc(Fd, GBP) -> GenHangulL_2 = fun(Range) -> io:format(Fd, "~8c~s gc_h_V(R1,[CP|Acc]);\n", [$\s,gen_case_clause(Range)]) end, [GenHangulL_2(CP) || CP <- merge_ranges(maps:get(v,GBP))], - io:put_chars(Fd, " R1 -> gc_h_lv_lvt(R1, Acc)\n end.\n\n"), + io:put_chars(Fd, " R1 -> gc_h_lv_lvt(R1, R0, Acc)\n end.\n\n"), io:put_chars(Fd, "%% Handle Hangul V\n"), io:put_chars(Fd, "gc_h_V(R0, Acc) ->\n case cp(R0) of\n"), @@ -787,10 +787,10 @@ gen_gc(Fd, GBP) -> GenHangulLVT = fun(Range) -> io:format(Fd, "gc_h_lv_lvt~s gc_h_T(R1,[CP|Acc]);\n", [gen_clause2(Range)]) end, [GenHangulLVT(CP) || CP <- merge_ranges(maps:get(lvt,GBP))], - io:put_chars(Fd, "gc_h_lv_lvt([CP|R], []) -> gc_extend(cp(R), R, CP);\n"), %% From gc_1/1 + io:put_chars(Fd, "gc_h_lv_lvt([CP|R1], _, []) -> gc_extend(cp(R1), R1, CP);\n"), %% From gc_1/1 io:put_chars(Fd, "%% Also handles error tuples\n"), - io:put_chars(Fd, "gc_h_lv_lvt(R, [CP]) -> gc_extend(R, R, CP);\n"), - io:put_chars(Fd, "gc_h_lv_lvt(R, Acc) -> gc_extend2(R, R, Acc).\n\n"), + io:put_chars(Fd, "gc_h_lv_lvt(R1, R0, [CP]) -> gc_extend(R1, R0, CP);\n"), + io:put_chars(Fd, "gc_h_lv_lvt(R1, R0, Acc) -> gc_extend2(R1, R0, Acc).\n\n"), ok. gen_compose_pairs(Fd, ExclData, Data) -> @@ -891,9 +891,9 @@ gen_clause({R0, R1}) -> io_lib:format("([CP|R1]=R0) when ~w =< CP, CP =< ~w ->", [R0,R1]). gen_clause2({R0, undefined}) -> - io_lib:format("([~w=CP|R1], Acc) ->", [R0]); + io_lib:format("([~w=CP|R1], R0, Acc) ->", [R0]); gen_clause2({R0, R1}) -> - io_lib:format("([CP|R1], Acc) when ~w =< CP, CP =< ~w ->", [R0,R1]). + io_lib:format("([CP|R1], R0, Acc) when ~w =< CP, CP =< ~w ->", [R0,R1]). gen_case_clause({R0, undefined}) -> io_lib:format("[~w=CP|R1] ->", [R0]); -- cgit v1.2.3