[Bug report] Chinese characters are not handled correctly in Rterm for Windows

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[Bug report] Chinese characters are not handled correctly in Rterm for Windows

Azure-2
Hello everyone,


I am new to R and I have experienced some bugs when using Rterm on Windows.

Chinese characters in the console output are discarded by Rterm, and trying

to type them into the console will crash the Rterm application.


---ENVIRONMENT---

Platform = x86_64-w64-mingw32

OS = Windows 10 Pro 1709 chs

R version = 3.4.3

Active code page = 936 (Simplified Chinese)


---STEPS TO REPRODUCE---

1. Run cmd and start bin\x64\R.exe


2. Note that all Chinese characters in the startup banner are missing


3. > Sys.getlocale()

[1] "LC_COLLATE=Chinese (Simplified)_China.936;LC_CTYPE=Chinese (Simplified)
_China.936;LC_MONETARY=Chinese (Simplified)_China.936;LC_NUMERIC=C;LC_
TIME=Chinese (Simplified)_China.936"

4. > print("ABC\u4f60\u597dDEF")
[1] "ABCDEF"
(Unicode code points for "���")

5. Use Microsoft Pinyin IME to type "���" into the console. An error message appeared:
> invalid multibyte character in mbcs_get_next
Then the program crashed. My debugger reported a heap corruption, displayed as follows:
0x00007FFE2F3687BB (ntdll.dll) (Rterm.exe ��)����δ��������쳣: 0xC0000374: �����𻵡� (����: 0x00007FFE2F3CC6E0)��
However, if the text is pasted into the console, it will not crash.

---ADDITIONAL INFO---
Both 32-bit and 64-bit versions have the same problem.
I attached a debugger to observe Rterm's behavior. The command in step 4
produced the following calling sequence of C library function "fputc":

fputc ( 91, 0x00007ffe2d1aea40 ) //'['
fputc ( 49, 0x00007ffe2d1aea40 ) //'1'
fputc ( 93, 0x00007ffe2d1aea40 ) //']'
//fflush ( 0x00007ffe2d1aea40 )
fputc ( 32, 0x00007ffe2d1aea40 ) //' '
fputc ( 34, 0x00007ffe2d1aea40 ) //'\"'
fputc ( 65, 0x00007ffe2d1aea40 ) //'A'
fputc ( 66, 0x00007ffe2d1aea40 ) //'B'
fputc ( 67, 0x00007ffe2d1aea40 ) //'C'
fputc ( 196, 0x00007ffe2d1aea40 ) //FAILED!
fputc ( 227, 0x00007ffe2d1aea40 ) //FAILED!
fputc ( 186, 0x00007ffe2d1aea40 ) //FAILED!
fputc ( 195, 0x00007ffe2d1aea40 ) //FAILED!
fputc ( 68, 0x00007ffe2d1aea40 ) //'D'
fputc ( 69, 0x00007ffe2d1aea40 ) //'E'
fputc ( 70, 0x00007ffe2d1aea40 ) //'F'
fputc ( 34, 0x00007ffe2d1aea40 ) //'\"'
//fflush ( 0x00007ffe2d1aea40 )
fputc ( 10, 0x00007ffe2d1aea40 ) //'\n'

{196, 227, 186, 195} or {C4 E3 BA C3} is multi-byte-encoded "���" in GBK (Code page 936).
These calls failed with a Windows error code 28 (No space left on device), while the subsequent
calls to fputc succeeded.

Then I used C++ to implement a terminal front-end with REmbedded facilities. R outputs were
simply printf-ed to stdout. Everything worked as expected:

Initializing R environment
R version 3.4.3 detected
> print("��ã�����һ���й�ѧ����R is great!")
[1] "��ã�����һ���й�ѧ����R is great!"
> Sys.getlocale()
[1] "LC_COLLATE=Chinese (Simplified)_China.936;LC_CTYPE=Chinese (Simplified)
_China.936;LC_MONETARY=Chinese (Simplified)_China.936;LC_NUMERIC=C;LC_
TIME=Chinese (Simplified)_China.936"
>

I hope these information are helpful.

Best regards,
AzureFx

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Re: [Bug report] Chinese characters are not handled correctly in Rterm for Windows

Tomas Kalibera

Thank you for the report and initial debugging. I am not sure what is
going wrong, we may have to rely on your help to debug this (I do not
have a system to reproduce on). A user-targeted advice would be to use
RGui (Rgui.exe).

Does the problem also exist in R-devel?
https://cran.r-project.org/bin/windows/base/rdevel.html

Your example  print("ABC\u4f60\u597dDEF") is printing two Chinese
characters, right? The first one is C4E3 in CP936 (4F60 in Unicode) and
the second one is BAC3 in CP936 (597D in Unicode)? Could you reproduce
the problem with printing just one of the characters, say
print("ABC\u4f60DEF") ?

As a sanity check - does this display the correct characters in RGui? It
should, and does on my system, as RGui uses Unicode internally. By
correct I mean the characters shown e.g. here

https://msdn.microsoft.com/en-us/library/cc194923.aspx
https://msdn.microsoft.com/en-us/library/cc194920.aspx

What is the output of "chcp" in the terminal, before you run R.exe? It
may be different from what Sys.getlocale() gives in R.

If you take the sequence of the "fputc" commands you captured by the
debugger, and create a trivial console application to just run them -
would the characters display correctly in the same terminal from which
you run R.exe?

Thanks
Tomas


On 03/08/2018 06:54 PM, Azure wrote:

> Hello everyone,
>
>
> I am new to R and I have experienced some bugs when using Rterm on Windows.
>
> Chinese characters in the console output are discarded by Rterm, and trying
>
> to type them into the console will crash the Rterm application.
>
>
> ---ENVIRONMENT---
>
> Platform = x86_64-w64-mingw32
>
> OS = Windows 10 Pro 1709 chs
>
> R version = 3.4.3
>
> Active code page = 936 (Simplified Chinese)
>
>
> ---STEPS TO REPRODUCE---
>
> 1. Run cmd and start bin\x64\R.exe
>
>
> 2. Note that all Chinese characters in the startup banner are missing
>
>
> 3. > Sys.getlocale()
>
> [1] "LC_COLLATE=Chinese (Simplified)_China.936;LC_CTYPE=Chinese (Simplified)
> _China.936;LC_MONETARY=Chinese (Simplified)_China.936;LC_NUMERIC=C;LC_
> TIME=Chinese (Simplified)_China.936"
>
> 4. > print("ABC\u4f60\u597dDEF")
> [1] "ABCDEF"
> (Unicode code points for "���")
>
> 5. Use Microsoft Pinyin IME to type "���" into the console. An error message appeared:
>> invalid multibyte character in mbcs_get_next
> Then the program crashed. My debugger reported a heap corruption, displayed as follows:
> 0x00007FFE2F3687BB (ntdll.dll) (Rterm.exe ��)����δ���������쳣: 0xC0000374: �����𻵡� (����: 0x00007FFE2F3CC6E0)��
> However, if the text is pasted into the console, it will not crash.
>
> ---ADDITIONAL INFO---
> Both 32-bit and 64-bit versions have the same problem.
> I attached a debugger to observe Rterm's behavior. The command in step 4
> produced the following calling sequence of C library function "fputc":
>
> fputc ( 91, 0x00007ffe2d1aea40 ) //'['
> fputc ( 49, 0x00007ffe2d1aea40 ) //'1'
> fputc ( 93, 0x00007ffe2d1aea40 ) //']'
> //fflush ( 0x00007ffe2d1aea40 )
> fputc ( 32, 0x00007ffe2d1aea40 ) //' '
> fputc ( 34, 0x00007ffe2d1aea40 ) //'\"'
> fputc ( 65, 0x00007ffe2d1aea40 ) //'A'
> fputc ( 66, 0x00007ffe2d1aea40 ) //'B'
> fputc ( 67, 0x00007ffe2d1aea40 ) //'C'
> fputc ( 196, 0x00007ffe2d1aea40 ) //FAILED!
> fputc ( 227, 0x00007ffe2d1aea40 ) //FAILED!
> fputc ( 186, 0x00007ffe2d1aea40 ) //FAILED!
> fputc ( 195, 0x00007ffe2d1aea40 ) //FAILED!
> fputc ( 68, 0x00007ffe2d1aea40 ) //'D'
> fputc ( 69, 0x00007ffe2d1aea40 ) //'E'
> fputc ( 70, 0x00007ffe2d1aea40 ) //'F'
> fputc ( 34, 0x00007ffe2d1aea40 ) //'\"'
> //fflush ( 0x00007ffe2d1aea40 )
> fputc ( 10, 0x00007ffe2d1aea40 ) //'\n'
>
> {196, 227, 186, 195} or {C4 E3 BA C3} is multi-byte-encoded "���" in GBK (Code page 936).
> These calls failed with a Windows error code 28 (No space left on device), while the subsequent
> calls to fputc succeeded.
>
> Then I used C++ to implement a terminal front-end with REmbedded facilities. R outputs were
> simply printf-ed to stdout. Everything worked as expected:
>
> Initializing R environment
> R version 3.4.3 detected
>> print("��ã�����һ���й�ѧ����R is great!")
> [1] "��ã�����һ���й�ѧ����R is great!"
>> Sys.getlocale()
> [1] "LC_COLLATE=Chinese (Simplified)_China.936;LC_CTYPE=Chinese (Simplified)
> _China.936;LC_MONETARY=Chinese (Simplified)_China.936;LC_NUMERIC=C;LC_
> TIME=Chinese (Simplified)_China.936"
> I hope these information are helpful.
>
> Best regards,
> AzureFx
>
> [[alternative HTML version deleted]]
>
>
>
> ______________________________________________
> [hidden email] mailing list
> https://stat.ethz.ch/mailman/listinfo/r-devel



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