warning: $crate may not be imported

[andybarron]

When compiling (as a dependency) via nightly:

warning: `$crate` may not be imported
  --> C:\Users\Andy\.cargo\registry\src\github.com-1ecc6299db9ec823\piston2d-gfx_graphics-0.33.0\src\back_end.rs:39:1
   |
39 | gfx_pipeline_base!( pipe_textured {
   | ^
   |
   = note: `use $crate;` was erroneously allowed and will become a hard error in a future release
   = note: this error originates in a macro outside of the current crate

[Jascha-N]

It no longer compiles under nightly at all.

[mitchmindtree]

I think the problem is due to a rustc bug fix that broke gfx. See here gfx-rs/gfx#1070.

[andybarron]

Still having this issue on latest nightly (1.15 / 2016-11-15). The rustc bug mentioned above has been fixed.

   Compiling piston2d-gfx_graphics v0.33.1
warning: `$crate` may not be imported
  --> C:\Users\Andy\.cargo\registry\src\github.com-1ecc6299db9ec823\piston2d-gfx_graphics-0.33.1\src\back_end.rs:30:1
   |
30 | gfx_pipeline_base!( pipe_colored {
   | ^
   |
   = note: `use $crate;` was erroneously allowed and will become a hard error in a future release
   = note: this error originates in a macro outside of the current crate

warning: `$crate` may not be imported
  --> C:\Users\Andy\.cargo\registry\src\github.com-1ecc6299db9ec823\piston2d-gfx_graphics-0.33.1\src\back_end.rs:39:1
   |
39 | gfx_pipeline_base!( pipe_textured {
   | ^
   |
   = note: `use $crate;` was erroneously allowed and will become a hard error in a future release
   = note: this error originates in a macro outside of the current crate

error[E0432]: unresolved import ``
  --> C:\Users\Andy\.cargo\registry\src\github.com-1ecc6299db9ec823\piston2d-gfx_graphics-0.33.1\src\back_end.rs:30:1
   |
30 | gfx_pipeline_base!( pipe_colored {
   | ^ no `` in the root
   |
   = note: this error originates in a macro outside of the current crate

error[E0432]: unresolved import ``
  --> C:\Users\Andy\.cargo\registry\src\github.com-1ecc6299db9ec823\piston2d-gfx_graphics-0.33.1\src\back_end.rs:39:1
   |
39 | gfx_pipeline_base!( pipe_textured {
   | ^ no `` in the root
   |
   = note: this error originates in a macro outside of the current crate

error: aborting due to 2 previous errors

Build failed, waiting for other jobs to finish...
error: Could not compile `piston2d-gfx_graphics`.

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