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Build Failure -- Mismatched types #60

Description

@Christina2333
fd-queue = {version = "1.0.0", features = ["tokio-fd"]}
libc = "0.2"
error[E0308]: mismatched types
   --> /Users/mac/.cargo/registry/src/github.com-1ecc6299db9ec823/fd-queue-1.1.0/src/biqueue/iomsg.rs:173:31
    |
173 |             (*p).msg_iovlen = iov_len;
    |             ---------------   ^^^^^^^ expected `i32`, found `usize`
    |             |
    |             expected due to the type of this binding

error[E0308]: mismatched types
   --> /Users/mac/.cargo/registry/src/github.com-1ecc6299db9ec823/fd-queue-1.1.0/src/biqueue/iomsg.rs:175:35
    |
175 |             (*p).msg_controllen = cmsg_buffer.len();
    |             -------------------   ^^^^^^^^^^^^^^^^^ expected `u32`, found `usize`
    |             |
    |             expected due to the type of this binding

error[E0308]: mismatched types
   --> /Users/mac/.cargo/registry/src/github.com-1ecc6299db9ec823/fd-queue-1.1.0/src/biqueue/iomsg.rs:331:40
    |
331 |             self.mhdr.msg_controllen = cmsg_buffer_fds_space(count);
    |             ------------------------   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected `u32`, found `usize`
    |             |
    |             expected due to the type of this binding

error[E0308]: mismatched types
   --> /Users/mac/.cargo/registry/src/github.com-1ecc6299db9ec823/fd-queue-1.1.0/src/biqueue/iomsg.rs:492:38
    |
492 |             assert!(cmsg.cmsg_len <= (isize::MAX as usize));
    |                                      ^^^^^^^^^^^^^^^^^^^^^ expected `u32`, found `usize`
    |
help: you can convert a `usize` to a `u32` and panic if the converted value doesn't fit
    |
492 |             assert!(cmsg.cmsg_len <= ((isize::MAX as usize)).try_into().unwrap());
    |                                      +                     +++++++++++++++++++++

error[E0308]: mismatched types
   --> /Users/mac/.cargo/registry/src/github.com-1ecc6299db9ec823/fd-queue-1.1.0/src/biqueue/iomsg.rs:634:43
    |
634 |         let data_size = (cmsg).cmsg_len - hdr_size;
    |                                           ^^^^^^^^ expected `u32`, found `usize`

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