Problems for source package rust-syntect

Malformed Build-Depends

Package declares a build time dependency on 'librust-plist-0.4+default-dev <!nocheck>' which is broken Syntax.
Package declares a build time dependency on 'librust-flate2-1+default-dev <!nocheck>' which is broken Syntax.
Package declares a build time dependency on 'librust-fnv-1+default-dev <!nocheck>' which is broken Syntax.
Package declares a build time dependency on 'librust-walkdir-2+default-dev <!nocheck>' which is broken Syntax.
Package declares a build time dependency on 'librust-serde-derive-1+default-dev <!nocheck>' which is broken Syntax.
Package declares a build time dependency on 'librust-bitflags-1+default-dev <!nocheck>' which is broken Syntax.
Package declares a build time dependency on 'librust-regex-syntax-0.6+default-dev <!nocheck>' which is broken Syntax.
Package declares a build time dependency on 'librust-yaml-rust-0.4+default-dev <!nocheck>' which is broken Syntax.
Package declares a build time dependency on 'librust-lazy-static-1+default-dev <!nocheck>' which is broken Syntax.
Package declares a build time dependency on 'librust-serde-json-1+default-dev <!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 'librust-lazycell-1+default-dev <!nocheck>' which is broken Syntax.
Package declares a build time dependency on 'librust-serde-1+default-dev <!nocheck>' which is broken Syntax.
Package declares a build time dependency on 'libstd-rust-dev <!nocheck>' which is broken Syntax.
Package declares a build time dependency on 'librust-bincode-1+default-dev <!nocheck>' which is broken Syntax.
Package declares a build time dependency on 'librust-onig-4+default-dev (>= 4.1-~~) <!nocheck>' which is broken Syntax.
Package declares a build time dependency on 'cargo:native <!nocheck>' which is broken Syntax.