macro! compilation is broken

[alsam]

Hello,
compiling the code

// stolen from here: https://github.com/docopt/docopt.rs

#![feature(plugin)]
#![plugin(docopt_macros)]

extern crate rustc_serialize;
extern crate docopt;

use docopt::Docopt;

docopt!(Args derive Debug, "
Naval Fate.

Usage:
  naval_fate.py ship new <name>...
  naval_fate.py ship <name> move <x> <y> [--speed=<kn>]
  naval_fate.py ship shoot <x> <y>
  naval_fate.py mine (set|remove) <x> <y> [--moored | --drifting]
  naval_fate.py (-h | --help)
  naval_fate.py --version

Options:
  -h --help     Show this screen.
  --version     Show version.
  --speed=<kn>  Speed in knots [default: 10].
  --moored      Moored (anchored) mine.
  --drifting    Drifting mine.
");

fn main() {
    let args: Args = Args::docopt().decode().unwrap_or_else(|e| e.exit());
    println!("{:?}", args);
}

I got the following:

RUST_BACKTRACE=1 rustc docopt_macro_use_case.rs --crate-name naval_fate --crate-type bin -g --out-dir /home/asamoilo/work/github/rust-samples/target/debug --emit=dep-info,link -L dependency=/home/asamoilo/work/github/rust-samples/target/debug -L dependency=/home/asamoilo/work/github/rust-samples/target/debug/deps --extern docopt_macros=/home/asamoilo/work/github/rust-samples/target/debug/deps/libdocopt_macros-c73640b38aaffb8d.so --extern dft=/home/asamoilo/work/github/rust-samples/target/debug/deps/libdft-f4ce2babe14ba439.rlib --extern endianness=/home/asamoilo/work/github/rust-samples/target/debug/deps/libendianness-03fb7d6dfcaefa9d.rlib --extern docopt=/home/asamoilo/work/github/rust-samples/target/debug/deps/libdocopt-bf1b771f6864695e.rlib --extern argparse=/home/asamoilo/work/github/rust-samples/target/debug/deps/libargparse-b299699413f65723.rlib --extern rustc_serialize=/home/asamoilo/work/github/rust-samples/target/debug/deps/librustc_serialize-e1b49f9d5f55eb83.rlib --extern integration=/home/asamoilo/work/github/rust-samples/target/debug/deps/libintegration-177fefb4396d4fcd.rlib --extern numeric=/home/asamoilo/work/github/rust-samples/target/debug/deps/libnumeric-86fe9c7e7012a01e.rlib --extern special_fun=/home/asamoilo/work/github/rust-samples/target/debug/deps/libspecial_fun-d51bb029c8a5ee5d.rlib --extern byteorder=/home/asamoilo/work/github/rust-samples/target/debug/deps/libbyteorder-8ad3fd7ac7478b9a.rlib --extern roots=/home/asamoilo/work/github/rust-samples/target/debug/deps/libroots-0fba8f516aedf92c.rlib --extern indoc=/home/asamoilo/work/github/rust-samples/target/debug/deps/libindoc-2ba8995adfb67597.so --extern arrayfire=/home/asamoilo/work/github/rust-samples/target/debug/deps/libarrayfire-28a6376b56875e96.rlib --extern num=/home/asamoilo/work/github/rust-samples/target/debug/deps/libnum-a2e6e61627ca7fe5.rlib -L /home/asamoilo/work/github/rust-samples/target/debug/build/openblas-provider-1395a30c451777af/out/opt/OpenBLAS/lib -L /home/asamoilo/work/github/rust-samples/target/debug/build/hdf5-sys-be6255808ddb57e7/out/install/lib -L native=/home/asamoilo/work/github/rust-samples/target/debug/build/special-fun-d22d3ab3b7c86bd7/out -L native=/home/asamoilo/work/arrayfire-3/lib
docopt_macro_use_case.rs:11:28: 28:2 error: internal compiler error: attempted to bump the parser past EOF (may be stuck in a loop)
docopt_macro_use_case.rs:11 docopt!(Args derive Debug, "
docopt_macro_use_case.rs:12 Naval Fate.
docopt_macro_use_case.rs:13
docopt_macro_use_case.rs:14 Usage:
docopt_macro_use_case.rs:15   naval_fate.py ship new <name>...
docopt_macro_use_case.rs:16   naval_fate.py ship <name> move <x> <y> [--speed=<kn>]
                            ...
note: the compiler unexpectedly panicked. this is a bug.
note: we would appreciate a bug report: https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.md#bug-reports
thread 'rustc' panicked at 'Box<Any>', src/libsyntax/errors/mod.rs:530
stack backtrace:
   1:     0x7f90c1fb4910 - std::sys::backtrace::tracing::imp::write::h3152d690c5b90b0c
   2:     0x7f90c1fc1fdb - std::panicking::default_hook::_$u7b$$u7b$closure$u7d$$u7d$::hb638acea7c29901b
   3:     0x7f90c1fc1b77 - std::panicking::default_hook::h508c3dab3df347d6
   4:     0x7f90c1f8590f - std::sys_common::unwind::begin_unwind_inner::h5cd31b1580026517
   5:     0x7f90bdc57b57 - std::sys_common::unwind::begin_unwind::h3c4f13a755ad0bbe
   6:     0x7f90bdca4d27 - syntax::errors::Handler::span_bug::hdcb0e10c51b41480
   7:     0x7f90bdd245cf - syntax::parse::parser::Parser::bug::he7b4111e59d952e8
   8:     0x7f90bdd209de - syntax::parse::parser::Parser::bump::he523a889a3b45d37
   9:     0x7f90b94acaa1 - syntax::parse::parser::Parser::parse_seq_to_end::h8ca401faebe38a0b
                        at src/libsyntax/parse/parser.rs:888
  10:     0x7f90b9449dd0 - docopt_macros::MacParser::parse::h44f944b05c21e77a
                        at /home/asamoilo/.cargo/registry/src/git.luolix.top-88ac128001ac3a9a/docopt_macros-0.6.81/src/macro.rs:178
  11:     0x7f90b94492c9 - docopt_macros::expand::h1e2acea4b9daddc9
                        at /home/asamoilo/.cargo/registry/src/git.luolix.top-88ac128001ac3a9a/docopt_macros-0.6.81/src/macro.rs:41
  12:     0x7f90c22e3668 - _<F as syntax..ext..base..TTMacroExpander>::expand::he655593cd83ac43e
  13:     0x7f90bdef8495 - syntax::ext::expand::expand_item_mac::hb9fd5452efe40ae2
  14:     0x7f90bdee63e1 - syntax::ext::expand::expand_annotatable::h97f0f2de9049603e
  15:     0x7f90bdee36a8 - syntax::ext::expand::expand_item::h2f2d11398d59e88e
  16:     0x7f90bdef1a9e - _<ext..expand..MacroExpander<'a, 'b> as fold..Folder>::fold_item::ha0c7e351e3f5aec8
  17:     0x7f90bdef16c3 - syntax::fold::noop_fold_mod::hd8dd04756addcf17
  18:     0x7f90bdeeab5e - syntax::ext::expand::expand_item_kind::hf32f931f8054890c
  19:     0x7f90bdf26c3e - syntax::fold::noop_fold_item_simple::hd96dc1e0c8e0f12b
  20:     0x7f90bdf267a0 - syntax::fold::noop_fold_item::hcdb2ebce0b2581f7
  21:     0x7f90bdee7c50 - syntax::ext::expand::expand_annotatable::h97f0f2de9049603e
  22:     0x7f90bdee36a8 - syntax::ext::expand::expand_item::h2f2d11398d59e88e
  23:     0x7f90bdef1d8e - _<ext..expand..MacroExpander<'a, 'b> as fold..Folder>::fold_item::ha0c7e351e3f5aec8
  24:     0x7f90bdf32efb - _<ext..expand..MacroExpander<'a, 'b> as fold..Folder>::fold_crate::hd1955ef311b10dc7
 25:     0x7f90bdf343ba - syntax::ext::expand::expand_crate::h178a95a0ec3cd12a
  26:     0x7f90c23bc9b1 - rustc_driver::driver::phase_2_configure_and_expand::_$u7b$$u7b$closure$u7d$$u7d$::h7eccc7aae229e943
  27:     0x7f90c2368127 - rustc_driver::driver::phase_2_configure_and_expand::he16002fe35b1b913
  28:     0x7f90c234c08a - rustc_driver::driver::compile_input::h8aae9cff2c941087
  29:     0x7f90c233bae4 - rustc_driver::run_compiler::h19dee01e74add0e2
  30:     0x7f90c2339041 - std::sys_common::unwind::try::try_fn::hfc6358ae35d5adc0
  31:     0x7f90c1fb1f6b - __rust_try
  32:     0x7f90c1fb1efd - std::sys_common::unwind::inner_try::h0adf4a3bf383b17e
  33:     0x7f90c233988a - _<F as alloc..boxed..FnBox<A>>::call_box::h9115446e39330382
  34:     0x7f90c1fc01a4 - std::sys::thread::Thread::new::thread_start::h8dfc0bc1e9d1f51d
  35:     0x7f90bd901850 - start_thread
  36:     0x7f90c1c2990c - clone
  37:                0x0 - <unknown>

Additional information:

rustc --version
rustc 1.9.0-dev (a48c9a11a 2016-03-29)
uname -a
Linux ies-d2s-dev-05.ies.mentorg.com 2.6.32-358.el6.x86_64 #1 SMP Tue Jan 29 11:47:41 EST 2013 x86_64 x86_64 x86_64 GNU/Linux

Thanks!

[pmarcelll]

This is caused by #32479, docopt triggers the ICE in the new code, but a fix is already on the way: docopt/docopt.rs#171.
You just have to update docopt when this PR is merged.

[alsam]

Great, thanks @pmarcelll !

[alsam]

Closing the issue - the patch has landed.