Problems for source package rust-futures-core

Malformed Build-Depends

Package declares a build time dependency on 'rustc:native ' which is broken Syntax.
Package declares a build time dependency on 'librust-either-1+use-std-dev (>= 1.4~~) ' which is broken Syntax.
Package declares a build time dependency on 'cargo:native ' which is broken Syntax.
Package declares a build time dependency on 'libstd-rust-dev ' which is broken Syntax.

Binary Package: librust-futures-core+either-dev (Version: 0.2.1-1)

Relationships

Package has a Depends on librust-either-1-dev (>= 1.4~~) which cannot be satisfied on arm64.
Package has a Depends on librust-either-1-dev (>= 1.4~~) which cannot be satisfied on s390x.
Package has a Depends on librust-either-1-dev (>= 1.4~~) which cannot be satisfied on mips64el.
Package has a Depends on librust-either-1-dev (>= 1.4~~) which cannot be satisfied on mips.
Package has a Depends on librust-either-1-dev (>= 1.4~~) which cannot be satisfied on ppc64el.
Package has a Depends on librust-either-1-dev (>= 1.4~~) which cannot be satisfied on mipsel.
Package has a Depends on librust-either-1-dev (>= 1.4~~) which cannot be satisfied on armel.
Package has a Depends on librust-either-1-dev (>= 1.4~~) which cannot be satisfied on armhf.
Package has a Depends on librust-either-1-dev (>= 1.4~~) which cannot be satisfied on amd64.
Package has a Depends on librust-either-1-dev (>= 1.4~~) which cannot be satisfied on i386.

Binary Package: librust-futures-core+std-dev (Version: 0.2.1-1)

Relationships

Package has a Depends on librust-either-1+use-std-dev (>= 1.4~~) which cannot be satisfied on armhf.
Package has a Depends on librust-either-1+use-std-dev (>= 1.4~~) which cannot be satisfied on armel.
Package has a Depends on librust-either-1+use-std-dev (>= 1.4~~) which cannot be satisfied on i386.
Package has a Depends on librust-either-1+use-std-dev (>= 1.4~~) which cannot be satisfied on amd64.
Package has a Depends on librust-either-1+use-std-dev (>= 1.4~~) which cannot be satisfied on mips64el.
Package has a Depends on librust-either-1+use-std-dev (>= 1.4~~) which cannot be satisfied on s390x.
Package has a Depends on librust-either-1+use-std-dev (>= 1.4~~) which cannot be satisfied on arm64.
Package has a Depends on librust-either-1+use-std-dev (>= 1.4~~) which cannot be satisfied on mipsel.
Package has a Depends on librust-either-1+use-std-dev (>= 1.4~~) which cannot be satisfied on ppc64el.
Package has a Depends on librust-either-1+use-std-dev (>= 1.4~~) which cannot be satisfied on mips.