ICE with nested macros

This program:

use core::util::with;
use core::hashmap::linear::LinearMap;

fn main() {
  let mut map = LinearMap::new();
  map.insert(1, 1);

  macro_rules! add_foo(
    ($a1:expr, $b1:expr) => ({
      map.find(&$a1).map(|&m| *m + $b1);
    })
  );

  macro_rules! foo(
    ($a:expr, $b:expr) => ({
      add_foo!($a, $b);
      add_foo!($b, $a);
    })
  );

  let def = 1;
  foo!(def, def);
}

fail with:

$ rustc --test bug2.rs
bug2.rs:22:12: 22:15 error: internal compiler error: No variable registered for id 25
bug2.rs:22   foo!(def, def);
                       ^~~
bug2.rs:8:2: 12:4 note: in expansion of add_foo!
bug2.rs:16:6: 16:23 note: expansion site
bug2.rs:14:2: 19:4 note: in expansion of foo!
bug2.rs:22:2: 22:17 note: expansion site

Seems non-critical for 0.7. Nominating for milestone 5 (production-ready).

accepted for production ready

Updated test case:

use std::util::with;
use std::hashmap::HashMap;

fn main() {
  let mut map = HashMap::new();
  map.insert(1, 1);

  macro_rules! add_foo(
    ($a1:expr, $b1:expr) => ({
      map.find(&$a1).map(|&m| *m + $b1);
    })
  );

  macro_rules! foo(
    ($a:expr, $b:expr) => ({
      add_foo!($a, $b);
      add_foo!($b, $a);
    })
  );

  let def = 1;
  foo!(def, def);
}

$ rustc foo.rs
foo.rs:22:12: 22:15 error: internal compiler error: No variable registered for id 20
foo.rs:22   foo!(def, def);
                      ^~~
foo.rs:8:2: 12:4 note: in expansion of add_foo!
foo.rs:16:6: 16:23 note: expansion site
foo.rs:14:2: 19:4 note: in expansion of foo!
foo.rs:22:2: 22:17 note: expansion site

I think the tag "A-macos" is unfortunate, since this is not Mac OS specific. Or is it?

@kud1ing

@kud1ing good catch, someone probably mistook it for macros. It's been updated to A-mac-osx though, which should prevent that.

Still ICEs.

Closed with what I believe was the renumbering of the AST. There's plenty of tests for this already present, so closing issue entirely.

Merge pull request rust-lang#4650 from FranciscoTGouveia/f32/64-nativ…

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ICE with nested macros #4650

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ICE with nested macros #4650

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catamorphism commented on Apr 25, 2013

graydon commented on May 2, 2013

emberian commented on Jun 24, 2013

kud1ing commented on Aug 9, 2013

emberian commented on Aug 9, 2013

msullivan commented on Aug 10, 2013

alexcrichton commented on Sep 26, 2013

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