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| author | Hans Bolinder <[email protected]> | 2018-06-26 15:05:00 +0200 |
|---|---|---|
| committer | Hans Bolinder <[email protected]> | 2018-08-20 14:05:56 +0200 |
| commit | a00f10d6e65f64d3b47e7c32e82c6ccf611d46ff (patch) | |
| tree | 09613d6e210d4873d4d4bbe0e788cf8732d13094 /lib/stdlib/src/io_lib.erl | |
| parent | 4197110f6811de1677f167e6ffd4efc54c807f0c (diff) | |
| download | otp-a00f10d6e65f64d3b47e7c32e82c6ccf611d46ff.tar.gz otp-a00f10d6e65f64d3b47e7c32e82c6ccf611d46ff.tar.bz2 otp-a00f10d6e65f64d3b47e7c32e82c6ccf611d46ff.zip | |
stdlib: Improve error handling in module io_lib
Diffstat (limited to 'lib/stdlib/src/io_lib.erl')
| -rw-r--r-- | lib/stdlib/src/io_lib.erl | 49 |
1 files changed, 36 insertions, 13 deletions
diff --git a/lib/stdlib/src/io_lib.erl b/lib/stdlib/src/io_lib.erl index 3a5aba60b4..8223a52873 100644 --- a/lib/stdlib/src/io_lib.erl +++ b/lib/stdlib/src/io_lib.erl @@ -178,11 +178,11 @@ fread(Cont, Chars, Format) -> Data :: [term()]. format(Format, Args) -> - case catch io_lib_format:fwrite(Format, Args) of - {'EXIT',_} -> - erlang:error(badarg, [Format, Args]); - Other -> - Other + try io_lib_format:fwrite(Format, Args) + catch + C:R:S -> + test_modules_loaded(C, R, S), + erlang:error(badarg, [Format, Args]) end. -spec format(Format, Data, Options) -> chars() when @@ -193,11 +193,11 @@ format(Format, Args) -> CharsLimit :: chars_limit(). format(Format, Args, Options) -> - case catch io_lib_format:fwrite(Format, Args, Options) of - {'EXIT',_} -> - erlang:error(badarg, [Format, Args, Options]); - Other -> - Other + try io_lib_format:fwrite(Format, Args, Options) + catch + C:R:S -> + test_modules_loaded(C, R, S), + erlang:error(badarg, [Format, Args]) end. -spec scan_format(Format, Data) -> FormatList when @@ -208,7 +208,9 @@ format(Format, Args, Options) -> scan_format(Format, Args) -> try io_lib_format:scan(Format, Args) catch - _:_ -> erlang:error(badarg, [Format, Args]) + C:R:S -> + test_modules_loaded(C, R, S), + erlang:error(badarg, [Format, Args]) end. -spec unscan_format(FormatList) -> {Format, Data} when @@ -223,7 +225,12 @@ unscan_format(FormatList) -> FormatList :: [char() | format_spec()]. build_text(FormatList) -> - io_lib_format:build(FormatList). + try io_lib_format:build(FormatList) + catch + C:R:S -> + test_modules_loaded(C, R, S), + erlang:error(badarg, [FormatList]) + end. -spec build_text(FormatList, Options) -> chars() when FormatList :: [char() | format_spec()], @@ -232,7 +239,23 @@ build_text(FormatList) -> CharsLimit :: chars_limit(). build_text(FormatList, Options) -> - io_lib_format:build(FormatList, Options). + try io_lib_format:build(FormatList, Options) + catch + C:R:S -> + test_modules_loaded(C, R, S), + erlang:error(badarg, [FormatList, Options]) + end. + +%% Failure to load a module must not be labeled as badarg. +%% C, R, and S are included so that the original error, which could be +%% a bug in io_lib_format, can be found by tracing on +%% test_modules_loaded/3. +test_modules_loaded(_C, _R, _S) -> + Modules = [io_lib_format, io_lib_pretty, string, unicode], + case code:ensure_modules_loaded(Modules) of + ok -> ok; + Error -> erlang:error(Error) + end. -spec print(Term) -> chars() when Term :: term(). |