use of unstable library feature 'duration_float'

[freebufdaolang]

cargo build --examples
Compiling quiche v0.1.0 (/home/pi/quiche-master)
error[E0658]: use of unstable library feature 'duration_float'
--> src/recovery.rs:380:43
|
380 | self.rttvar = self.rttvar.mul_f64(3.0 / 4.0) +
| ^^^^^^^
|
= note: for more information, see rust-lang/rust#54361

error[E0658]: use of unstable library feature 'duration_float'
--> src/recovery.rs:381:49
|
381 | sub_abs(srtt, adjusted_rtt).mul_f64(1.0 / 4.0);
| ^^^^^^^
|
= note: for more information, see rust-lang/rust#54361

error[E0658]: use of unstable library feature 'duration_float'
--> src/recovery.rs:384:26
|
384 | srtt.mul_f64(7.0 / 8.0) + adjusted_rtt.mul_f64(1.0 / 8.0),
| ^^^^^^^
|
= note: for more information, see rust-lang/rust#54361

error[E0658]: use of unstable library feature 'duration_float'
--> src/recovery.rs:384:60
|
384 | srtt.mul_f64(7.0 / 8.0) + adjusted_rtt.mul_f64(1.0 / 8.0),
| ^^^^^^^
|
= note: for more information, see rust-lang/rust#54361

error[E0658]: use of unstable library feature 'duration_float'
--> src/recovery.rs:447:51
|
447 | cmp::max(self.latest_rtt, self.rtt()).mul_f64(TIME_THRESHOLD);
| ^^^^^^^
|
= note: for more information, see rust-lang/rust#54361

error: aborting due to 5 previous errors

For more information about this error, try rustc --explain E0658.
error: Could not compile quiche.

[freebufdaolang]

rustc -V
rustc 1.36.0

[freebufdaolang]

update 1.38 ok now