ICE: ERROR:rbml::reader: failed to find block with tag 24

[Manishearth]

While compiling this branch, I get an ICE:

ERROR:rbml::reader: failed to find block with tag 24
error: internal compiler error: unexpected panic
note: the compiler unexpectedly panicked. this is a bug.
note: we would appreciate a bug report: http://doc.rust-lang.org/complement-bugreport.html
note: run with `RUST_BACKTRACE=1` for a backtrace
thread 'rustc' panicked at 'explicit panic', /home/rustbuild/src/rust-buildbot/slave/nightly-dist-rustc-linux/build/src/librbml/lib.rs:262

stack backtrace:
   1:     0x7ffb4410eb10 - sys::backtrace::write::hf1af6455eb97d5d1SZt
   2:     0x7ffb44130d80 - failure::on_fail::he2e581bffa6b3e43LdA
   3:     0x7ffb4409f3d0 - rt::unwind::begin_unwind_inner::hc22dd6e06baffeb3MSz
   4:     0x7ffb3d5a85a0 - rt::unwind::begin_unwind::h17658163199423864613
   5:     0x7ffb3d5a7330 - reader::get_doc::h6fcf164d61a0eed4nLa
   6:     0x7ffb4240e630 - metadata::decoder::get_crate_deps::h29d72fe2ab783c0943h
   7:     0x7ffb424230f0 - metadata::creader::CrateReader<'a>::register_crate::ha0a19c38566f2dd1bZi
   8:     0x7ffb42421dc0 - metadata::creader::CrateReader<'a>::resolve_crate::h33f254f4aab7c647F1i
   9:     0x7ffb42425990 - metadata::creader::CrateReader<'a>::resolve_crate_deps::unboxed_closure.80673
  10:     0x7ffb424255c0 - collections::hash::map::HashMap<K, V, S>.FromIterator<(K, V*>::from_iter::h9939124809408312487
  11:     0x7ffb424230f0 - metadata::creader::CrateReader<'a>::register_crate::ha0a19c38566f2dd1bZi
  12:     0x7ffb42421dc0 - metadata::creader::CrateReader<'a>::resolve_crate::h33f254f4aab7c647F1i
  13:     0x7ffb4241c930 - metadata::creader::CrateReader<'a>.visit..Visitor<'v>::visit_item::h6181ddf6fd71ae74Gwi
  14:     0x7ffb42420620 - metadata::creader::CrateReader<'a>::read_crates::hbb4123febf0413ddKLi
  15:     0x7ffb44677030 - driver::phase_3_run_analysis_passes::h2b4d73d04573d4a8VFa
  16:     0x7ffb4465f080 - driver::compile_input::h429df6b6fc379921Bba
  17:     0x7ffb447227f0 - run_compiler::h36725e1b8ad321f2R8b
  18:     0x7ffb44720f60 - thunk::F.Invoke<A, R>::invoke::h14346289220899741794
  19:     0x7ffb4471fec0 - rt::unwind::try::try_fn::h2326157258396559205
  20:     0x7ffb4419c620 - rust_try_inner
  21:     0x7ffb4419c610 - rust_try
  22:     0x7ffb44720170 - thunk::F.Invoke<A, R>::invoke::h1704532574046242019
  23:     0x7ffb4411ea20 - sys::thread::thread_start::h9000ab048e180f84aPw
  24:     0x7ffb3e3700c0 - start_thread
  25:     0x7ffb43d23fd9 - __clone
  26:                0x0 - <unknown>

Could not compile `html5ever`.

I'm on rustc 1.0.0-nightly (4874ca36f 2015-01-23 00:18:57 +0000)

[kmcallister]

These are usually fixed by a clean re-build, did you try that?

[Manishearth]

Works now, thanks.

[kmcallister]

I would like to understand what's going wrong with metadata or the build system in these cases. But I'd also like to completely overhaul metadata...