Boost\libs\locale\test failed to build during "Testing codepoints above 0xFFFF", error occurred on MSVC

[rachelhe123]

Issue Description:
Boost\libs\locale\test failed to build during "Testing codepoints above 0xFFFF", error occurred on MSVC . Could you please take a look? The master branch commit we used is a1552ab.

Build Steps:
1. git clone -c core.autocrlf=true --recursive ​ https://github.com/boostorg/boost.git boost
2. open a VS 2019 x86 command prompt and browse to boost
3. .\bootstrap
4. .\b2 headers variant=release --build-dir=..\out\x86rel address-model=32
5. .\b2 variant=release --build-dir=..\out\x86rel address-model=32
6. .\b2 -j16 variant=release --build-dir=..\out\x86rel libs\locale\test

Error Info:
testing.capture-output ..\out\x86rel\boost\bin.v2\libs\locale\test\test_std_collate.test\msvc-14.2\release\threading-multi\test_std_collate.run
1 file(s) copied.
testing.capture-output ..\out\x86rel\boost\bin.v2\libs\locale\test\test_codepage.test\msvc-14.2\release\threading-multi\test_codepage.run
====== BEGIN OUTPUT ======

• Testing correct invalid bytes skipping
  -- ISO-8859-8
  -- cp932
  Warning: detected unproper support of ja_JP.SJIS locale, disableling it
  Testing for backend std
  Testing wide I/O
  wchar_t
  UTF-8
  Testing codepoints above 0xFFFF
  Single U+2008A
  Error in line:67 read_file(f1) == cmp
  Error in line:76 read_file(testo) == file
  Single U+2008A withing text
  Error in line:67 read_file(f1) == cmp
  Error in line:76 read_file(testo) == file
  U+2008A x 1000
  Error in line:67 read_file(f1) == cmp
  Error in line:76 read_file(testo) == file
  ISO8859-8
  ISO8859-1
  Testing charset to/from UTF conversion functions
  char
  wchar_t
  Testing utf_to_utf
  char<-char
  char<-wchar
  wchar<-char
  wchar<-wchar
  Testing for backend winapi
  Testing wide I/O
  wchar_t
  UTF-8
  Testing codepoints above 0xFFFF
  Single U+2008A
  Single U+2008A withing text
  U+2008A x 1000
  Testing charset to/from UTF conversion functions
  char
  wchar_t
  Testing utf_to_utf
  char<-char
  char<-wchar
  wchar<-char
  wchar<-wchar

Passed 366 tests
Failed 6 tests
98.4% of tests completed sucsessefully

EXIT STATUS: 1
====== END OUTPUT ======

set Path=F:\gitP\boostorg\out\x86rel\boost\bin.v2\libs\locale\build\msvc-14.2\release\threading-multi;F:\gitP\boostorg\out\x86rel\boost\bin.v2\libs\system\build\msvc-14.2\release\threading-multi;%Path%

set status=0
if %status% NEQ 0 (
    echo Skipping test execution due to testing.execute=off
    exit 0
)
 "..\out\x86rel\boost\bin.v2\libs\locale\test\test_codepage.test\msvc-14.2\release\threading-multi\test_codepage.exe"   > "..\out\x86rel\boost\bin.v2\libs\locale\test\test_codepage.test\msvc-14.2\release\threading-multi\test_codepage.output" 2>&1 
set status=%ERRORLEVEL%
echo. >> "..\out\x86rel\boost\bin.v2\libs\locale\test\test_codepage.test\msvc-14.2\release\threading-multi\test_codepage.output"
echo EXIT STATUS: %status% >> "..\out\x86rel\boost\bin.v2\libs\locale\test\test_codepage.test\msvc-14.2\release\threading-multi\test_codepage.output"
if %status% EQU 0 (
    copy "..\out\x86rel\boost\bin.v2\libs\locale\test\test_codepage.test\msvc-14.2\release\threading-multi\test_codepage.output" "..\out\x86rel\boost\bin.v2\libs\locale\test\test_codepage.test\msvc-14.2\release\threading-multi\test_codepage.run"
)
set verbose=0
if %status% NEQ 0 (
    set verbose=1
)
if %verbose% EQU 1 (
    echo ====== BEGIN OUTPUT ======
    type "..\out\x86rel\boost\bin.v2\libs\locale\test\test_codepage.test\msvc-14.2\release\threading-multi\test_codepage.output"
    echo ====== END OUTPUT ======
)
exit %status%

...failed testing.capture-output ..\out\x86rel\boost\bin.v2\libs\locale\test\test_codepage.test\msvc-14.2\release\threading-multi\test_codepage.run...

See more details in log:
test.log.txt

[Flamefire]

Yes this is currently a known issue, the Boost.Locale testsuite is known to fail on various platforms due to changes to the toolchains not accounted for in the tests.
In particular this is a duplicate of #71. Will be working on this soon, but no ETA yet.

[Flamefire]

Fixed by #113