Problems for source package rust-ena

Malformed Build-Depends

Package declares a build time dependency on 'librust-log-0.4+default-dev <!nocheck>' which is broken Syntax.
Package declares a build time dependency on 'cargo:native <!nocheck>' which is broken Syntax.
Package declares a build time dependency on 'rustc:native <!nocheck>' which is broken Syntax.
Package declares a build time dependency on 'libstd-rust-dev <!nocheck>' which is broken Syntax.

Binary Package: librust-ena+congruence-closure-dev (Version: 0.13.1-1)

Half Broken Relationships

Package has a Depends on librust-petgraph-0.4+default-dev (>= 0.4.5-~~) which cannot be satisfied on i386. At least one of librust-petgraph-0.5+default-dev | librust-petgraph-0.4+default-dev (>= 0.4.5-~~) can be satisfied however.
Package has a Depends on librust-petgraph-0.4+default-dev (>= 0.4.5-~~) which cannot be satisfied on armhf. At least one of librust-petgraph-0.5+default-dev | librust-petgraph-0.4+default-dev (>= 0.4.5-~~) can be satisfied however.
Package has a Depends on librust-petgraph-0.4+default-dev (>= 0.4.5-~~) which cannot be satisfied on ppc64el. At least one of librust-petgraph-0.5+default-dev | librust-petgraph-0.4+default-dev (>= 0.4.5-~~) can be satisfied however.
Package has a Depends on librust-petgraph-0.4+default-dev (>= 0.4.5-~~) which cannot be satisfied on arm64. At least one of librust-petgraph-0.5+default-dev | librust-petgraph-0.4+default-dev (>= 0.4.5-~~) can be satisfied however.
Package has a Depends on librust-petgraph-0.4+default-dev (>= 0.4.5-~~) which cannot be satisfied on amd64. At least one of librust-petgraph-0.5+default-dev | librust-petgraph-0.4+default-dev (>= 0.4.5-~~) can be satisfied however.
Package has a Depends on librust-petgraph-0.4+default-dev (>= 0.4.5-~~) which cannot be satisfied on mips64el. At least one of librust-petgraph-0.5+default-dev | librust-petgraph-0.4+default-dev (>= 0.4.5-~~) can be satisfied however.
Package has a Depends on librust-petgraph-0.4+default-dev (>= 0.4.5-~~) which cannot be satisfied on armel. At least one of librust-petgraph-0.5+default-dev | librust-petgraph-0.4+default-dev (>= 0.4.5-~~) can be satisfied however.
Package has a Depends on librust-petgraph-0.4+default-dev (>= 0.4.5-~~) which cannot be satisfied on s390x. At least one of librust-petgraph-0.5+default-dev | librust-petgraph-0.4+default-dev (>= 0.4.5-~~) can be satisfied however.
Package has a Depends on librust-petgraph-0.4+default-dev (>= 0.4.5-~~) which cannot be satisfied on mipsel. At least one of librust-petgraph-0.5+default-dev | librust-petgraph-0.4+default-dev (>= 0.4.5-~~) can be satisfied however.