Grin: Get error while build grin

[alden-alvins]

I try to build the grin node today

i got following error

Compiling grin_servers v1.1.0-beta.2
(/media/extendgrin/servers)
error[E0599]: no method named checked_sub found for type std::time::Instant in the current scope
--> servers/src/grin/dandelion_monitor.rs:51:6
|
51 | .checked_sub(Duration::from_secs(20))
| ^^^^^^^^^^^

error: aborting due to previous error

For more information about this error, try rustc --explain E0599.
error: Could not compile grin_servers.

I am using ubuntu 18.04 Rust version in rustc 1.31.0

[antiochp]

Some recent changes require rust 1.34.0.
Running rustup update to get the latest stable rust release should resolve this.

[Giszmo]

The app should probably be less cryptic about this and check for the rust version before running into errors.

[kargakis]

Agreed with @Giszmo, it would be more friendly to require the right version of Rust at compile time instead of breaking at the first incompatibility. Maybe by using a build script?

https://doc.rust-lang.org/cargo/reference/build-scripts.html

[UbuntuEvangelist]

Same here on UBuntu 18.04

[inix]

@antiochp
I also build error with docker,maybe the developer shoud update Dockerfile?