rustdoc: "FormatMessage failure" on Windows

[liigo]

upstream/master:

rustdoc: doc/index.html
i686-pc-mingw32/stage2/bin/rustdoc.exe --markdown-css rust.css --markdown-before-content=doc/version_info.html --markdown-in-header=doc/favicon.inc --markdown-after-content=doc/footer.inc  /home/LIIGO/rust/rust/src/doc/index.md
rustdoc: doc/tutorial.html
i686-pc-mingw32/stage2/bin/rustdoc.exe --markdown-css rust.css --markdown-before-content=doc/version_info.html --markdown-in-header=doc/favicon.inc --markdown-after-content=doc/footer.inc  /home/LIIGO/rust/rust/src/doc/tutorial.md
task '<main>' failed at '[15100] FormatMessage failure', D:\MinGW\msys\1.0\home\LIIGO\rust\rust\src\libstd\os.rs:743
make: *** [doc/tutorial.html] Error 101

[huonw]

Does that build include the fix in #13043?

[liigo]

Yes, include.
2014年3月22日 下午6:45于 "Huon Wilson" notifications@github.com写道：

Does that build include the fix in #13043#13043
?

—
Reply to this email directly or view it on GitHubhttps://github.com//issues/13073#issuecomment-38348271
.

[huonw]

Thanks for confirming.

cc @alexcrichton

[klutzy]

Reproduced on revision 092afdb. Note that I'm using win 8.1 with non-english locale which probably causes issues.

Quick investigation:
FormatMessage is called by std::os::last_os_error(), which gets system error code then convert the code into string. It seems that FormatMessage failed with 15100: ERROR_MUI_FILE_NOT_FOUND.

[klutzy]

So the issue is broken into two parts: 1. why rustdoc failed and called last_os_error()? 2. why FormatMessage failed?