I saw this failure in rayon CI: https://ci.appveyor.com/project/cuviper/rayon/builds/29634901/job/y7h1kc7w9wsusl8r ``` info: syncing channel updates for 'beta-x86_64-pc-windows-gnu' info: latest update on 2019-12-18, rust version 1.41.0-beta.1 (eb3f7c2d3 2019-12-17) [...] beta installed - (error reading rustc version) Rust is installed now. Great! To get started you need Cargo's bin directory (%USERPROFILE%.cargo\bin) in your PATH environment variable. Future applications will automatically have the correct environment, but you may need to restart your current shell. set PATH=%PATH%;C:\Users\appveyor\.cargo\bin rustc -Vv Command exited with code -1073741515 ``` I'm on Linux, but I tried this build under Wine: ``` 005b:err:module:import_dll Library libstdc++-6.dll (which is needed by L"Z:\\home\\jistone\\.rustup\\toolchains\\beta-x86_64-pc-windows-gnu\\bin\\rustc_driver-2602f879d4c5def3.dll") not found 005b:err:module:import_dll Library rustc_driver-2602f879d4c5def3.dll (which is needed by L"Z:\\home\\jistone\\.rustup\\toolchains\\beta-x86_64-pc-windows-gnu\\bin\\rustc.exe") not found 005b:err:module:LdrInitializeThunk Importing dlls for L"Z:\\home\\jistone\\.rustup\\toolchains\\beta-x86_64-pc-windows-gnu\\bin\\rustc.exe" failed, status c0000135 ``` It seems @mati865's intention in #65911 was that this should be statically linked, but that was clobbered by #67077 in `src/bootstrap/compile.rs` at least. The same error occurs on `1.41.0-nightly (3ed3b8bb7 2019-12-17)` (via Wine again for me).