Bug#1029330: librust-backoff-dev: Depends: librust-getrandom-0.2+js-dev but it is not installable

[Adrian Bunk]

Package: librust-backoff-dev
Version: 0.4.0-1
Severity: serious

The following packages have unmet dependencies:
 librust-backoff-dev : Depends: librust-getrandom-0.2+js-dev but it is not 
installable