Trouble with cygwin

[mcandre]

Clippy has trouble when running in cygwin environments...

$ cargo clippy
...
Caused by:
  process didn't exit successfully: `C:\Users\vagrant\.rustup\toolchains\stable-i686-pc-windows-msvc\bin\clippy-driver.exe rustc --crate-name bronze src/lib/bronze.rs --color never --crate-type lib --emit=dep-info,metadata -C debuginfo=2 -C metadata=e721302df396d816 -C extra-filename=-e721302df396d816 --out-dir 'C:\vagrant\target\debug\deps' -C 'incremental=C:\vagrant\target\debug\incremental' -L 'dependency=C:\vagrant\target\debug\deps'` (exit code: 3221225477)

As a workaround, one can sometimes run clippy from a cmd.exe or PowerShell.exe context, though even that doesn't work when the cmd/PowerShell session is running within an SSH environment, such as over vagrant ssh...

I haven't delved into the rustup code yet, but it appears that a check for which directory separator to use is defaulting to UNIX forward slash (/) in 32-bit Windows, whereas rustup in 64-bit Windows correctly applies backslash (\).

[hcpl]

Related issues: #2310, #3202 and #3345.

[mati865]

Duplicate of #3202