"note: this error originates in a macro from the standard library" but it's just an extern crate

[durka]

I created two crates, exported a macro from one to the other, and invoked the macro in the latter. The macro expands to code that doesn't compile. The error is:

error[E0425]: unresolved name `Wrong`
 --> src/lib.rs:6:9
  |
6 |         a!();
  |         ^^^^^
  |
  = note: this error originates in a macro from the standard library

error: aborting due to previous error

error: Could not compile `b`.

But the macro isn't in the standard library; rather it's in a crate that I imported.

rustc 1.13.0-nightly (923bac459 2016-09-06)
binary: rustc
commit-hash: 923bac45964940c56ab1075fb7980896de1eb620
commit-date: 2016-09-06
host: x86_64-apple-darwin
release: 1.13.0-nightly

cc @jonathandturner

[sophiajt]

Good catch. Updated in #36498