Regression: no method in scope

[alexcrichton]

A stable-to-beta crater report shows regressions related to

error�(B: no method named `read_u8` found for type `&mut R` in the current scope�(B
  �(B--> �(Bsrc/reader/parser/macros.rs:27:47�(B
   �(B|�(B
27�(B �(B| �(B        let val = try_with_pos!($pos, $reader.�(Bread_u8�(B());�(B
   �(B| �(B                                              �(B^^^^^^^�(B
   �(B| �(B
  �(B::: �(Bsrc/reader/parser/binary.rs�(B
   �(B|�(B
88�(B �(B| �(B        let type_code = �(Btry_read_le_u8!(common.pos, reader)�(B;�(B
   �(B| �(B                        �(B-----------------------------------�(B in this macro invocation�(B
   �(B|�(B
   �(B= �(Bhelp�(B: items from traits can only be used if the trait is in scope; the following trait is implemented but not in scope, perhaps add a `use` for it:�(B
   �(B= �(Bhelp�(B: candidate #1: `use reader::parser::macros::byteorder::ReadBytesExt`�(B

• fbx_direct-0.6.1 (before) (after)

I'm opening an issue to ensure that we're tracking these regressions and they're either expected (so we can close), this is a dupe (so we can close), or we can fix (and then close!)

cc @rust-lang/compiler

[TimNN]

Also fixed by #37023.