Problems for source package rust-which

Malformed Build-Depends

Package declares a build time dependency on 'libstd-rust-dev ' which is broken Syntax.
Package declares a build time dependency on 'librust-libc-0.2+default-dev (>= 0.2.10-~~) ' which is broken Syntax.
Package declares a build time dependency on 'rustc:native ' which is broken Syntax.
Package declares a build time dependency on 'librust-failure-0.1+std-dev (>= 0.1.1-~~) ' which is broken Syntax.
Package declares a build time dependency on 'cargo:native ' which is broken Syntax.

Binary Package: librust-which-dev (Version: 2.0.1-1)

Relationships

Package has a Depends on librust-libc-0.2+default-dev (>= 0.2.10-~~) which cannot be satisfied on mips.
Package has a Depends on librust-libc-0.2+default-dev (>= 0.2.10-~~) which cannot be satisfied on ppc64el.
Package has a Depends on librust-libc-0.2+default-dev (>= 0.2.10-~~) which cannot be satisfied on arm64.
Package has a Depends on librust-libc-0.2+default-dev (>= 0.2.10-~~) which cannot be satisfied on s390x.
Package has a Depends on librust-libc-0.2+default-dev (>= 0.2.10-~~) which cannot be satisfied on mips64el.
Package has a Depends on librust-libc-0.2+default-dev (>= 0.2.10-~~) which cannot be satisfied on amd64.
Package has a Depends on librust-libc-0.2+default-dev (>= 0.2.10-~~) which cannot be satisfied on i386.
Package has a Depends on librust-libc-0.2+default-dev (>= 0.2.10-~~) which cannot be satisfied on mipsel.
Package has a Depends on librust-libc-0.2+default-dev (>= 0.2.10-~~) which cannot be satisfied on armhf.
Package has a Depends on librust-libc-0.2+default-dev (>= 0.2.10-~~) which cannot be satisfied on armel.
Package has a Depends on librust-failure-0.1+std-dev (>= 0.1.1-~~) which cannot be satisfied on amd64.
Package has a Depends on librust-failure-0.1+std-dev (>= 0.1.1-~~) which cannot be satisfied on i386.
Package has a Depends on librust-failure-0.1+std-dev (>= 0.1.1-~~) which cannot be satisfied on ppc64el.
Package has a Depends on librust-failure-0.1+std-dev (>= 0.1.1-~~) which cannot be satisfied on arm64.
Package has a Depends on librust-failure-0.1+std-dev (>= 0.1.1-~~) which cannot be satisfied on mips.
Package has a Depends on librust-failure-0.1+std-dev (>= 0.1.1-~~) which cannot be satisfied on mips64el.
Package has a Depends on librust-failure-0.1+std-dev (>= 0.1.1-~~) which cannot be satisfied on s390x.
Package has a Depends on librust-failure-0.1+std-dev (>= 0.1.1-~~) which cannot be satisfied on armhf.
Package has a Depends on librust-failure-0.1+std-dev (>= 0.1.1-~~) which cannot be satisfied on armel.
Package has a Depends on librust-failure-0.1+std-dev (>= 0.1.1-~~) which cannot be satisfied on mipsel.