There maybe fixed by change the dependency, and I will try to fix it latter.
error: failed to run custom build command for `pear_codegen v0.1.2`
Caused by:
process didn't exit successfully: `/tmp/cargo-installa44LYO/release/build/pear_codegen-7624b48d2189c45b/build-script-build` (exit code: 101)
--- stderr
Error: Pear requires a nightly or dev version of Rust.
Installed version is: 1.40.0 (2019-12-16). Minimum required: 1.31.0-nightly (2018-10-05).
thread 'main' panicked at 'Aborting compilation due to incompatible compiler.', /home/yanganto/.cargo/registry/src/github.com-1ecc6299db9ec823/pear_codegen-0.1.2/build.rs:31:13
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace.
warning: build failed, waiting for other jobs to finish...
error: failed to compile `mprober v0.10.8`, intermediate artifacts can be found at `/tmp/cargo-installa44LYO`
Caused by:
build failed