Compile failed for v-0.2.7 error[E0015]
error[E0015]: calls in constant functions are limited to constant functions, tuple structs and tuple variants --> /root/.cargo/registry/src/github.com-1ecc6299db9ec823/http-0.2.7/src/header/name.rs:98:25 | 98 | $name_bytes => Some(StandardHeader::$konst), | ^^^^^^^^^^^ ... 154 | / standard_headers! { 155 | | /// Advertises which content types the client is able to understand. 156 | | /// 157 | | /// The Accept request HTTP header advertises which content types, expressed ... | 972 | | (XXssProtection, X_XSS_PROTECTION, b"x-xss-protection"); 973 | | } | |_- in this macro invocation | = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
Can you show what rust version you're using?