message: Change error handling in `cidr` `FromSql` implementations
diff: @@ -8,8 +8,7 @@ use crate::{FromSql, IsNull, ToSql, Type};
  impl<'a> FromSql<'a> for IpCidr {
  fn from_sql(_: &Type, raw: &[u8]) -> Result<Self, Box<dyn Error + Sync + Send>> {
  let inet = types::inet_from_sql(raw)?;
  - Ok(IpCidr::new(inet.addr(), inet.netmask())
  - .expect("postgres cidr type has zeroed host portion"))
  + Ok(IpCidr::new(inet.addr(), inet.netmask())?)
  }
  accepts!(CIDR);
  @@ -28,8 +27,7 @@ impl ToSql for IpCidr {
  impl<'a> FromSql<'a> for IpInet {
  fn from_sql(_: &Type, raw: &[u8]) -> Result<Self, Box<dyn Error + Sync + Send>> {
  let inet = types::inet_from_sql(raw)?;
  - Ok(IpInet::new(inet.addr(), inet.netmask())
  - .expect("postgres enforces maximum length of netmask"))
  + Ok(IpInet::new(inet.addr(), inet.netmask())?)
  }
  accepts!(INET);
  