Compiler error "trying to take the sizing type of str, an unsized type" #16848

ollie · 2014-08-29T14:10:36Z

Hello,

I don't know if this is related to #16822 or not. I was following the example here http://doc.rust-lang.org/getopts/ and wanted to tweak it so the program is only the filename, not the whole path to it. So I started hacking around and extracted it into a function, which resulted into this error.

I'm new to Rust, so… I'm doing silly things probably. :) Feel free to tell me.
Anyway this is not the "getopts" code, I wanted to isolate the problem. I also made the types explicit for illustration.

fn main() {
    let filename: &str = &filename_of_foo();
    // `filename` should be &"foo"
    println!("The filename is {}", filename);
}

fn filename_of_foo() -> str {
    let path: Path     = Path::new("./bar/foo");
    let filename: &str = path.filename_str().unwrap();
    *filename
}

$ RUST_BACKTRACE=1 rustc main.rs
error: internal compiler error: trying to take the sizing type of str, an unsized type
note: the compiler hit an unexpected failure path. 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
task 'rustc' failed at 'Box<Any>', /Users/olda/Code/rust/rust-lang/src/libsyntax/ast_util.rs:776

stack backtrace:
   1:        0x10e7ea9b5 - rt::backtrace::imp::write::hbe93ad1ca3375f7ai9q
   2:        0x10e7edd33 - failure::on_fail::ha008d924473a588cbqr
   3:        0x10eab3d23 - unwind::begin_unwind_inner::h53af0f566031f9f14fe
   4:        0x10c7b643a - unwind::begin_unwind::h3612296561932415380
   5:        0x10c7b6e40 - diagnostic::Handler::bug::h6cd4a0f0829e2050shF
   6:        0x10b3a5c58 - driver::session::Session::bug::hba3620fae1af216dkXz
   7:        0x10b75c121 - middle::trans::type_of::sizing_type_of::h7963730f82cd4b33Ma9
   8:        0x10b78aeac - middle::trans::expr::trans_unadjusted::he74a35bd5ea421c1Fh3
   9:        0x10b748380 - middle::trans::expr::trans::hd79efa6056358d2dEw2
  10:        0x10b798ca1 - middle::trans::expr::trans_addr_of::hff42e1cdb8b6828bfI4
  11:        0x10b78b4f8 - middle::trans::expr::trans_unadjusted::he74a35bd5ea421c1Fh3
  12:        0x10b748380 - middle::trans::expr::trans::hd79efa6056358d2dEw2
  13:        0x10b746b48 - middle::trans::expr::trans_into::h4adfb7ed4c8e4c8eIs2
  14:        0x10b82a54f - middle::trans::_match::store_local::closure.119296
  15:        0x10b82a321 - middle::trans::_match::mk_binding_alloca::h11723812663586266914
  16:        0x10b7f2233 - middle::trans::_match::store_local::h15ef2e60d6b94e5cA2h
  17:        0x10b7463b2 - middle::trans::base::init_local::hf1089f76e4fd41bdWFd
  18:        0x10b7458ea - middle::trans::controlflow::trans_stmt::h2ab88f6dc40905eblhY
  19:        0x10b74701c - middle::trans::controlflow::trans_block::hee6f69106b0dfacewmY
  20:        0x10b7fd0e2 - middle::trans::base::trans_closure::h9bdf3049defa1b73vye
  21:        0x10b7382a0 - middle::trans::base::trans_fn::hf0c57f353c923cd3iKe
  22:        0x10b73361f - middle::trans::base::trans_item::hbe3f225a458737f5i2e
  23:        0x10b8060bc - middle::trans::base::trans_crate::h430604ba8b62ae67JWf
  24:        0x10bbc0811 - driver::driver::phase_4_translate_to_llvm::h3758d3df9e2a7401pzy
  25:        0x10bbb9d3d - driver::driver::compile_input::hf84c86c09fa7f085Qby
  26:        0x10bc43dc7 - driver::run_compiler::hd0616be9c11c6733JIB
  27:        0x10bc42506 - driver::main_args::closure.138223
  28:        0x10bc53dbb - task::TaskBuilder<S>::try_future::closure.139341
  29:        0x10bc53cc3 - task::TaskBuilder<S>::spawn_internal::closure.139318
  30:        0x10e71e2ec - task::spawn_opts::closure.8459
  31:        0x10eb18b0c - rust_try_inner
  32:        0x10eb18af6 - rust_try
  33:        0x10eab1177 - unwind::try::h5bbc3fdef4df0c47k4d
  34:        0x10eab0f3b - task::Task::run::h3fd23eb8e2343898bbd
  35:        0x10e71e132 - task::spawn_opts::closure.8404
  36:        0x10eab2cb6 - thread::thread_start::hb6d4d41faea4249bXzd
  37:     0x7fff8ce03899 - _pthread_body
  38:     0x7fff8ce0372a - _pthread_struct_init

My system:
OS X 10.9.4

$ uname -v
Darwin Kernel Version 13.3.0: Tue Jun  3 21:27:35 PDT 2014; root:xnu-2422.110.17~1/RELEASE_X86_64
$ rustc --version
rustc 0.12.0-pre (0d3bd7720 2014-08-27 21:31:13 +0000)
$ cargo --version
cargo 0.0.1-pre (89259f1 2014-08-28 18:28:57 +0000)

Thanks,
Ollie

The text was updated successfully, but these errors were encountered:

alexcrichton · 2014-08-29T14:12:51Z

cc @nick29581

FranklinChen · 2014-08-29T14:16:13Z

Similarly, just today (yes, I know the code should not compile, but it is the internal compiler error that is the issue): http://is.gd/tVfINu

fn foo() -> Iterator<uint> {
    range(0u, 10).map(|i| i*i) as Iterator<uint>
}

Valloric · 2014-08-31T03:11:55Z

Getting the same ICE.

$ RUST_BACKTRACE=1 ./test.sh
error: internal compiler error: trying to take the sizing type of base::Expression, an unsized type
note: the compiler hit an unexpected failure path. 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
task 'rustc' failed at 'Box<Any>', /home/rustbuild/src/rust-buildbot/slave/nightly-linux/build/src/libsyntax/ast_util.rs:784

stack backtrace:
   1:     0x7f92be37e120 - rt::backtrace::imp::write::h3c0523c13636656fOLq
   2:     0x7f92be381310 - failure::on_fail::h9a355b0a53be785cw7q
   3:     0x7f92beb69740 - unwind::begin_unwind_inner::h0ab5484e74ee0101rje
   4:     0x7f92ba5c1310 - unwind::begin_unwind::h13307728250319235624
   5:     0x7f92ba5c1c80 - diagnostic::Handler::bug::h71ea0abb056f036fCdF
   6:     0x7f92bef5ca50 - driver::session::Session::bug::he64b8581f4fba397U5C
   7:     0x7f92bf327a90 - middle::trans::type_of::sizing_type_of::h3b1d93e5efb712d5Qc9
   8:     0x7f92bf357a60 - middle::trans::expr::trans_unadjusted::h838117360a218d5eJj3
   9:     0x7f92bf314030 - middle::trans::expr::trans::hdcfc6f99615b9e0aIy2
  10:     0x7f92bf366310 - middle::trans::expr::trans_addr_of::h477361cd3bceafb4jK4
  11:     0x7f92bf357a60 - middle::trans::expr::trans_unadjusted::h838117360a218d5eJj3
  12:     0x7f92bf312860 - middle::trans::expr::trans_into::h1423af8cb4e82c3dMu2
  13:     0x7f92bf3f94f0 - middle::trans::_match::store_local::closure.121546
  14:     0x7f92bf3f91e0 - middle::trans::_match::mk_binding_alloca::h6724705899647199174
  15:     0x7f92bf3bfff0 - middle::trans::_match::store_local::hf89815ececead9d8G4h
  16:     0x7f92bf311ed0 - middle::trans::base::init_local::heb1cfcf6c59d83fe1Hd
  17:     0x7f92bf3113e0 - middle::trans::controlflow::trans_stmt::he0a1d9a619a4044drhY
  18:     0x7f92bf312e00 - middle::trans::controlflow::trans_block::h7863f52e43c06945CmY
  19:     0x7f92bf3c8e80 - middle::trans::base::trans_closure::ha6113b08bc17793cAAe
  20:     0x7f92bf303840 - middle::trans::base::trans_fn::hb06093de10539f75nMe
  21:     0x7f92bf2feae0 - middle::trans::base::trans_item::hd285e8d770107116n4e
  22:     0x7f92bf2feae0 - middle::trans::base::trans_item::hd285e8d770107116n4e
  23:     0x7f92bf2feae0 - middle::trans::base::trans_item::hd285e8d770107116n4e
  24:     0x7f92bf2feae0 - middle::trans::base::trans_item::hd285e8d770107116n4e
  25:     0x7f92bf3d3b20 - middle::trans::base::trans_crate::hc2a811966285ee0aOYf
  26:     0x7f92bf8083d0 - driver::driver::phase_4_translate_to_llvm::h06435122d6db3633XHB
  27:     0x7f92bf7ffbf0 - driver::driver::compile_input::ha48623fcead7bd7e5jB
  28:     0x7f92bf893890 - driver::run_compiler::h0b258b9c360b66ddjRE
  29:     0x7f92bf8937a0 - driver::main_args::closure.141085
  30:     0x7f92bf8a7dc0 - task::TaskBuilder<S>::try_future::closure.142270
  31:     0x7f92bf8a7bc0 - task::TaskBuilder<S>::spawn_internal::closure.142247
  32:     0x7f92c03120b0 - task::spawn_opts::closure.8370
  33:     0x7f92bebc2490 - rust_try_inner
  34:     0x7f92bebc2480 - rust_try
  35:     0x7f92beb66cf0 - unwind::try::hea1640d217ab7457H7d
  36:     0x7f92beb66a90 - task::Task::run::hb52aad40b24ebf23Ndd
  37:     0x7f92c0311e10 - task::spawn_opts::closure.8316
  38:     0x7f92beb68930 - thread::thread_start::h741158bbfb282555MCd
  39:     0x7f92bde120c0 - start_thread
  40:     0x7f92be82ff89 - __clone
  41:                0x0 - <unknown>

$ rustc --version
rustc 0.12.0-pre-nightly (5419b2ca2 2014-08-29 22:16:20 +0000)

Repro steps: check out Valloric/nailgun@3e1408e and run ./test.sh.

mrmonday · 2014-09-09T14:10:58Z

Another test case:

#![allow(dead_code)]
trait A {}
fn foo<'a>() -> A + 'a { unimplemented!() }

fn main() {}

Play pen: http://is.gd/kTRaZL

Djuffin · 2014-09-11T10:08:42Z

+1
code similar to mrmonday's code

ollie · 2014-09-16T14:42:58Z

I tested it with latest rust and my problem seems fixed now. :)

Valloric · 2014-09-16T20:45:13Z

The playpen link from @mrmonday's post now produces the following output from rustc:

<anon>:7:5: 8:2 error: cannot move a value of type A+'a: the size of A+'a cannot be statically determined [E0161]
<anon>:7     unimplemented!()
<anon>:8 }
error: aborting due to previous error
playpen: application terminated with error code 101
Program ended.

So the ICE seems to be gone; haven't yet tried it out my code though.

Valloric · 2014-09-17T04:15:16Z

I cannot repro the ICE on my own code anymore after upgrading to latest nightly. This might actually be fixed now.

ollie · 2014-09-17T06:56:36Z

I'll close it then. I think there should be a new issue if there are other problems.

mikedilger · 2014-09-17T19:57:43Z

I just compiled a project that compiled fine until tonight's nightly, and the backtrace looks very similar to the original poster's, so I'm putting it here (rather than opening a new issue)

src/main.rs:85:25: 85:51 warning: use of deprecated item: use into_iter, #[warn(deprecated)] on by default
src/main.rs:85     for serverconfig in config.servers.move_iter() {
                                       ^~~~~~~~~~~~~~~~~~~~~~~~~~

error: internal compiler error: trying to take the sizing type of str, an unsized type
note: the compiler hit an unexpected failure path. 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
task 'rustc' failed at 'Box<Any>', /home/rustbuild/src/rust-buildbot/slave/nightly-linux/build/src/libsyntax/ast_util.rs:694

stack backtrace:
   1:     0x7f2e84b7eb80 - rt::backtrace::imp::write::hadb95304cd6b59a2iHq
   2:     0x7f2e84b81d40 - failure::on_fail::h88a79ad90b452a8dK2q
   3:     0x7f2e85331f60 - unwind::begin_unwind_inner::hd810389f34a8dc8bMTd
   4:     0x7f2e80f92570 - unwind::begin_unwind::h883036773483107899
   5:     0x7f2e80f92d10 - diagnostic::Handler::bug::ha03a127ac108cb809ND
   6:     0x7f2e85712040 - driver::session::Session::bug::hd8091c59ae3b07effyx
   7:     0x7f2e85af8300 - middle::trans::type_of::sizing_type_of::h12d44c3ad0a509b9NP9
   8:     0x7f2e85b27670 - middle::trans::meth::get_vtable::h71ff864a2270cfc0kOk
   9:     0x7f2e85b27000 - middle::trans::expr::apply_adjustments::unsized_info::h8041c4d8f81d7431Gl3
  10:     0x7f2e85b2a0e0 - middle::trans::expr::apply_adjustments::unsize_expr::closure.124122
  11:     0x7f2e85b2a220 - middle::trans::expr::apply_adjustments::into_fat_ptr::h012bc185249de733Zs3
  12:     0x7f2e85b25db0 - middle::trans::expr::apply_adjustments::apply_autoref::hff612d8b5d90a70cD82
  13:     0x7f2e85b25db0 - middle::trans::expr::apply_adjustments::apply_autoref::hff612d8b5d90a70cD82
  14:     0x7f2e85ae5960 - middle::trans::expr::trans::h139fd41d89b98122RW2
  15:     0x7f2e85ae4420 - middle::trans::expr::trans_into::hffcd0924abd4fea27S2
  16:     0x7f2e85bc9be0 - middle::trans::tvec::write_content::hd73973faa21b5330vPj
  17:     0x7f2e85b2d780 - middle::trans::tvec::trans_slice_vec::h65d0df732c3725d4PEj
  18:     0x7f2e85b21f10 - middle::trans::expr::trans_unadjusted::hb5708bd9b995e003LD3
  19:     0x7f2e85ae5960 - middle::trans::expr::trans::h139fd41d89b98122RW2
  20:     0x7f2e85b1ab20 - middle::trans::callee::trans_args::h40ba956d7101922f4r2
  21:     0x7f2e85aec7c0 - middle::trans::callee::trans_call_inner::hea87a946e0cffa34961
  22:     0x7f2e85b155b0 - middle::trans::callee::trans_method_call::h5a0bf5976bce0583C21
  23:     0x7f2e85b22da0 - middle::trans::expr::trans_rvalue_dps_unadjusted::h6f9547e6400812f9Sc4
  24:     0x7f2e85b21f10 - middle::trans::expr::trans_unadjusted::hb5708bd9b995e003LD3
  25:     0x7f2e85ae5960 - middle::trans::expr::trans::h139fd41d89b98122RW2
  26:     0x7f2e85b1ab20 - middle::trans::callee::trans_args::h40ba956d7101922f4r2
  27:     0x7f2e85aec7c0 - middle::trans::callee::trans_call_inner::hea87a946e0cffa34961
  28:     0x7f2e85b155b0 - middle::trans::callee::trans_method_call::h5a0bf5976bce0583C21
  29:     0x7f2e85b22da0 - middle::trans::expr::trans_rvalue_dps_unadjusted::h6f9547e6400812f9Sc4
  30:     0x7f2e85b21f10 - middle::trans::expr::trans_unadjusted::hb5708bd9b995e003LD3
  31:     0x7f2e85ae5960 - middle::trans::expr::trans::h139fd41d89b98122RW2
  32:     0x7f2e85b1ab20 - middle::trans::callee::trans_args::h40ba956d7101922f4r2
  33:     0x7f2e85aec7c0 - middle::trans::callee::trans_call_inner::hea87a946e0cffa34961
  34:     0x7f2e85b155b0 - middle::trans::callee::trans_method_call::h5a0bf5976bce0583C21
  35:     0x7f2e85b22da0 - middle::trans::expr::trans_rvalue_dps_unadjusted::h6f9547e6400812f9Sc4
  36:     0x7f2e85b21f10 - middle::trans::expr::trans_unadjusted::hb5708bd9b995e003LD3
  37:     0x7f2e85ae5960 - middle::trans::expr::trans::h139fd41d89b98122RW2
  38:     0x7f2e85b2c9c0 - middle::trans::expr::trans_binary::h5983843557b2865dyf5
  39:     0x7f2e85b21f10 - middle::trans::expr::trans_unadjusted::hb5708bd9b995e003LD3
  40:     0x7f2e85ae4420 - middle::trans::expr::trans_into::hffcd0924abd4fea27S2
  41:     0x7f2e85ae4900 - middle::trans::controlflow::trans_block::h697fa29e838af1025ZY
  42:     0x7f2e85b92810 - middle::trans::base::trans_closure::hf5f648fb424f9c93r1e
  43:     0x7f2e85ad6b60 - middle::trans::base::trans_fn::h17dae15f71272d8eEcf
  44:     0x7f2e85b96490 - middle::trans::meth::trans_impl::h5b1ebd2bcbfeba03Xck
  45:     0x7f2e85ad3780 - middle::trans::base::trans_item::h7f0dc64cc8095e95Nvf
  46:     0x7f2e85ad3780 - middle::trans::base::trans_item::h7f0dc64cc8095e95Nvf
  47:     0x7f2e85ad3780 - middle::trans::base::trans_item::h7f0dc64cc8095e95Nvf
  48:     0x7f2e85b9e780 - middle::trans::base::trans_crate::h40ab1d2d17a4f286Gtg
  49:     0x7f2e85f98330 - driver::driver::phase_4_translate_to_llvm::h9eab234cedcf7a6b7Yw
  50:     0x7f2e85f8f590 - driver::driver::compile_input::h06caa00e975ed0209ww
  51:     0x7f2e860126b0 - driver::run_compiler::h30663c3fdd061b12FnA
  52:     0x7f2e86012590 - driver::main_args::closure.146245
  53:     0x7f2e85740740 - task::TaskBuilder<S>::try_future::closure.101946
  54:     0x7f2e85740530 - task::TaskBuilder<S>::spawn_internal::closure.101917
  55:     0x7f2e8691e590 - task::spawn_opts::closure.8444
  56:     0x7f2e85389480 - rust_try_inner
  57:     0x7f2e85389470 - rust_try
  58:     0x7f2e8532f560 - unwind::try::h985905ef4937434euId
  59:     0x7f2e8532f3c0 - task::Task::run::h3a7021021ab3297dfYc
  60:     0x7f2e8691e300 - task::spawn_opts::closure.8384
  61:     0x7f2e85330fb0 - thread::thread_start::h67b84fc708de7e36rid
  62:     0x7f2e84645100 - start_thread
  63:     0x7f2e8500c929 - clone
  64:                0x0 - <unknown>

MatejLach · 2014-09-17T20:05:23Z

@mikedilger It might be better to open it as a new issue for better visibility.
@nick29581 ?

mikedilger · 2014-09-17T20:08:46Z

yep. done.

fix: handle attributes when typing curly bracket fix rust-lang#16848. When inserting a `{`, if it is identified that the front part of `expr` is `attr`, we consider it as inserting `{}` around the entire `expr` (excluding the attr part).

alexcrichton added the I-ICE label Aug 29, 2014

Valloric mentioned this issue Sep 6, 2014

ICE: trying to take the sizing type of A, an unsized type #17025

Closed

ollie closed this as completed Sep 17, 2014

mikedilger mentioned this issue Sep 17, 2014

internal compiler error: trying to take the sizing type of str, an unsized type #17351

Closed

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Compiler error "trying to take the sizing type of str, an unsized type" #16848

Compiler error "trying to take the sizing type of str, an unsized type" #16848

ollie commented Aug 29, 2014

alexcrichton commented Aug 29, 2014

FranklinChen commented Aug 29, 2014

Valloric commented Aug 31, 2014

mrmonday commented Sep 9, 2014

Djuffin commented Sep 11, 2014

ollie commented Sep 16, 2014

Valloric commented Sep 16, 2014

Valloric commented Sep 17, 2014

ollie commented Sep 17, 2014

mikedilger commented Sep 17, 2014

MatejLach commented Sep 17, 2014

mikedilger commented Sep 17, 2014

Compiler error "trying to take the sizing type of str, an unsized type" #16848

Compiler error "trying to take the sizing type of str, an unsized type" #16848

Comments

ollie commented Aug 29, 2014

alexcrichton commented Aug 29, 2014

FranklinChen commented Aug 29, 2014

Valloric commented Aug 31, 2014

mrmonday commented Sep 9, 2014

Djuffin commented Sep 11, 2014

ollie commented Sep 16, 2014

Valloric commented Sep 16, 2014

Valloric commented Sep 17, 2014

ollie commented Sep 17, 2014

mikedilger commented Sep 17, 2014

MatejLach commented Sep 17, 2014

mikedilger commented Sep 17, 2014