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ICE while checking match with struct-like patterns #8351

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dim-an opened this issue Aug 6, 2013 · 2 comments
Closed

ICE while checking match with struct-like patterns #8351

dim-an opened this issue Aug 6, 2013 · 2 comments
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I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️

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@dim-an
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dim-an commented Aug 6, 2013

ICE while compiling following code:

enum E {
    Foo{f: int},
    Bar
}

pub fn main() {
    let e = Foo{f: 1};
    match e {
        Foo{f: 0} => fail!(),
        Foo{_} => (),
        _ => fail!(),
    }
}

~ » RUST_LOG=rustc=1,::rt::backtrace rustc test.rs
rust: task failed at 'index out of bounds: the len is 0 but the index is 0', /home/ermolovd/workspace/rust/src/librustc/middle/check_match.rs:231
/home/ermolovd/.local/bin/../lib/librustrt.so(_ZN9rust_task13begin_failureEPKcS1_m+0x4b)[0x7f142848673b]
/home/ermolovd/.local/bin/../lib/librustrt.so(+0x2ad59)[0x7f1428497d59]
/home/ermolovd/.local/bin/../lib/librustrt.so(upcall_fail+0x1a8)[0x7f14284887b8]
/home/ermolovd/.local/bin/../lib/libstd-6c65cf4b443341b1-0.8-pre.so(_ZN3sys6rustrt16rust_upcall_fail17_f25e955198ccc5c014_0$x2e8$x2dpreE+0x37)[0x7f142abcf8d7]
/home/ermolovd/.local/bin/../lib/libstd-6c65cf4b443341b1-0.8-pre.so(_ZN3sys13begin_unwind_16_89e154cd091567114_0$x2e8$x2dpreE+0x71)[0x7f142abcfe61]
/home/ermolovd/.local/bin/../lib/libstd-6c65cf4b443341b1-0.8-pre.so(+0x91a0e)[0x7f142aaa9a0e]
/home/ermolovd/.local/bin/../lib/libstd-6c65cf4b443341b1-0.8-pre.so(+0x1cc66a)[0x7f142abe466a]
/home/ermolovd/.local/bin/../lib/libstd-6c65cf4b443341b1-0.8-pre.so(+0x17ee09)[0x7f142ab96e09]
/home/ermolovd/.local/bin/../lib/libstd-6c65cf4b443341b1-0.8-pre.so(+0xe350a)[0x7f142aafb50a]
/home/ermolovd/.local/bin/../lib/libstd-6c65cf4b443341b1-0.8-pre.so(+0x11174d)[0x7f142ab2974d]
/home/ermolovd/.local/bin/../lib/libstd-6c65cf4b443341b1-0.8-pre.so(+0x17ebc0)[0x7f142ab96bc0]
/home/ermolovd/.local/bin/../lib/libstd-6c65cf4b443341b1-0.8-pre.so(_ZN8unstable4lang17fail_bounds_check17_7112ff25e39642a214_0$x2e8$x2dpreE+0x211)[0x7f142aab64e1]
/home/ermolovd/.local/bin/../lib/librustc-d3cb8c2ccd84a7a7-0.8-pre.so(_ZN6middle11check_match9is_useful16_1efec9c180b8af314_0$x2e8$x2dpreE+0x4b7)[0x7f142909b467]
/home/ermolovd/.local/bin/../lib/librustc-d3cb8c2ccd84a7a7-0.8-pre.so(_ZN6middle11check_match21is_useful_specialized17_a8ff93c88f76c27914_0$x2e8$x2dpreE+0x430)[0x7f14290a3580]
/home/ermolovd/.local/bin/../lib/librustc-d3cb8c2ccd84a7a7-0.8-pre.so(_ZN6middle11check_match9is_useful16_1efec9c180b8af314_0$x2e8$x2dpreE+0x240f)[0x7f142909d3bf]
/home/ermolovd/.local/bin/../lib/librustc-d3cb8c2ccd84a7a7-0.8-pre.so(_ZN6middle11check_match10check_arms17_1c832619b9e2589c14_0$x2e8$x2dpreE+0x64b)[0x7f142909539b]
/home/ermolovd/.local/bin/../lib/librustc-d3cb8c2ccd84a7a7-0.8-pre.so(_ZN6middle11check_match10check_expr17_7a4496e893c2d5d114_0$x2e8$x2dpreE+0x3bb)[0x7f142909275b]
/home/ermolovd/.local/bin/../lib/librustc-d3cb8c2ccd84a7a7-0.8-pre.so(+0x9d4feb)[0x7f1429091feb]
/home/ermolovd/.local/bin/../lib/librustc-d3cb8c2ccd84a7a7-0.8-pre.so(+0x67f939)[0x7f1428d3c939]
/home/ermolovd/.local/bin/../lib/librustc-d3cb8c2ccd84a7a7-0.8-pre.so(+0x67f5a1)[0x7f1428d3c5a1]
/home/ermolovd/.local/bin/../lib/librustc-d3cb8c2ccd84a7a7-0.8-pre.so(+0x67f23f)[0x7f1428d3c23f]
/home/ermolovd/.local/bin/../lib/librustc-d3cb8c2ccd84a7a7-0.8-pre.so(+0x68adb7)[0x7f1428d47db7]
/home/ermolovd/.local/bin/../lib/librustc-d3cb8c2ccd84a7a7-0.8-pre.so(_ZN6middle11check_match8check_fn17_85bb11c86427ffcc14_0$x2e8$x2dpreE+0x151)[0x7f14290944c1]
/home/ermolovd/.local/bin/../lib/librustc-d3cb8c2ccd84a7a7-0.8-pre.so(+0x9d728e)[0x7f142909428e]
/home/ermolovd/.local/bin/../lib/librustc-d3cb8c2ccd84a7a7-0.8-pre.so(+0x67c694)[0x7f1428d39694]
/home/ermolovd/.local/bin/../lib/librustc-d3cb8c2ccd84a7a7-0.8-pre.so(+0x67ba23)[0x7f1428d38a23]
/home/ermolovd/.local/bin/../lib/librustc-d3cb8c2ccd84a7a7-0.8-pre.so(+0x67acf7)[0x7f1428d37cf7]
/home/ermolovd/.local/bin/../lib/librustc-d3cb8c2ccd84a7a7-0.8-pre.so(+0x67a884)[0x7f1428d37884]
/home/ermolovd/.local/bin/../lib/librustc-d3cb8c2ccd84a7a7-0.8-pre.so(+0x4222be)[0x7f1428adf2be]
/home/ermolovd/.local/bin/../lib/librustc-d3cb8c2ccd84a7a7-0.8-pre.so(_ZN6middle11check_match11check_crate17_3edff8522e9cc9ee14_0$x2e8$x2dpreE+0xbca)[0x7f142909181a]
/home/ermolovd/.local/bin/../lib/librustc-d3cb8c2ccd84a7a7-0.8-pre.so(+0xf57836)[0x7f1429614836]
/home/ermolovd/.local/bin/../lib/librustc-d3cb8c2ccd84a7a7-0.8-pre.so(+0x9b95d9)[0x7f14290765d9]
/home/ermolovd/.local/bin/../lib/librustc-d3cb8c2ccd84a7a7-0.8-pre.so(_ZN6driver6driver27phase_3_run_analysis_passes17_1b99c65643aa108b14_0$x2e8$x2dpreE+0x139b)[0x7f1429611c5b]
/home/ermolovd/.local/bin/../lib/librustc-d3cb8c2ccd84a7a7-0.8-pre.so(_ZN6driver6driver13compile_input15_4c53e9c6f69a0114_0$x2e8$x2dpreE+0x7e4)[0x7f1429617904]
/home/ermolovd/.local/bin/../lib/librustc-d3cb8c2ccd84a7a7-0.8-pre.so(_ZN12run_compiler16_0184613adfc5db914_0$x2e8$x2dpreE+0x27c7)[0x7f1429653637]
/home/ermolovd/.local/bin/../lib/librustc-d3cb8c2ccd84a7a7-0.8-pre.so(+0xfd24ea)[0x7f142968f4ea]
/home/ermolovd/.local/bin/../lib/librustc-d3cb8c2ccd84a7a7-0.8-pre.so(+0xfcc48c)[0x7f142968948c]
/home/ermolovd/.local/bin/../lib/librustc-d3cb8c2ccd84a7a7-0.8-pre.so(+0xfb9e06)[0x7f1429676e06]
/home/ermolovd/.local/bin/../lib/libstd-6c65cf4b443341b1-0.8-pre.so(+0x16aaf7)[0x7f142ab82af7]
/home/ermolovd/.local/bin/../lib/librustrt.so(_Z18task_start_wrapperP10spawn_args+0x2b)[0x7f14284870fb]
error: internal compiler error: unexpected failure
note: the compiler hit an unexpected failure path. this is a bug
note: try running with RUST_LOG=rustc=1,::rt::backtrace to get further details and report the results to github.com/mozilla/rust/issues
rust: task failed at 'explicit failure', /home/ermolovd/workspace/rust/src/librustc/rustc.rs:358
/home/ermolovd/.local/bin/../lib/librustrt.so(_ZN9rust_task13begin_failureEPKcS1_m+0x4b)[0x7f142848673b]
/home/ermolovd/.local/bin/../lib/librustrt.so(+0x2ad59)[0x7f1428497d59]
/home/ermolovd/.local/bin/../lib/librustrt.so(upcall_fail+0x1a8)[0x7f14284887b8]
/home/ermolovd/.local/bin/../lib/libstd-6c65cf4b443341b1-0.8-pre.so(_ZN3sys6rustrt16rust_upcall_fail17_f25e955198ccc5c014_0$x2e8$x2dpreE+0x37)[0x7f142abcf8d7]
/home/ermolovd/.local/bin/../lib/libstd-6c65cf4b443341b1-0.8-pre.so(_ZN3sys13begin_unwind_16_89e154cd091567114_0$x2e8$x2dpreE+0x71)[0x7f142abcfe61]
/home/ermolovd/.local/bin/../lib/libstd-6c65cf4b443341b1-0.8-pre.so(+0x1b853f)[0x7f142abd053f]
/home/ermolovd/.local/bin/../lib/libstd-6c65cf4b443341b1-0.8-pre.so(+0x1b7ccb)[0x7f142abcfccb]
/home/ermolovd/.local/bin/../lib/libstd-6c65cf4b443341b1-0.8-pre.so(+0x1b7a90)[0x7f142abcfa90]
/home/ermolovd/.local/bin/../lib/libstd-6c65cf4b443341b1-0.8-pre.so(+0x1b79e9)[0x7f142abcf9e9]
/home/ermolovd/.local/bin/../lib/libstd-6c65cf4b443341b1-0.8-pre.so(+0x1b7944)[0x7f142abcf944]
/home/ermolovd/.local/bin/../lib/libstd-6c65cf4b443341b1-0.8-pre.so(+0x1b84e8)[0x7f142abd04e8]
/home/ermolovd/.local/bin/../lib/libstd-6c65cf4b443341b1-0.8-pre.so(+0x1b7ccb)[0x7f142abcfccb]
/home/ermolovd/.local/bin/../lib/libstd-6c65cf4b443341b1-0.8-pre.so(+0x1b7a90)[0x7f142abcfa90]
/home/ermolovd/.local/bin/../lib/libstd-6c65cf4b443341b1-0.8-pre.so(+0x1b79e9)[0x7f142abcf9e9]
/home/ermolovd/.local/bin/../lib/libstd-6c65cf4b443341b1-0.8-pre.so(+0x1b7944)[0x7f142abcf944]
/home/ermolovd/.local/bin/../lib/libstd-6c65cf4b443341b1-0.8-pre.so(+0xb24d3)[0x7f142aaca4d3]
/home/ermolovd/.local/bin/../lib/librustc-d3cb8c2ccd84a7a7-0.8-pre.so(_ZN7monitor17_b5614286b08b504b14_0$x2e8$x2dpreE+0xa22)[0x7f1429655fa2]
/home/ermolovd/.local/bin/../lib/librustc-d3cb8c2ccd84a7a7-0.8-pre.so(_ZN4main15_f3d16eaf7d573814_0$x2e8$x2dpreE+0x88)[0x7f142968f328]
rustc[0x400c0e]
rustc(_rust_main+0x2e)[0x400c3e]
/home/ermolovd/.local/bin/../lib/librustrt.so(_Z18task_start_wrapperP10spawn_args+0x2b)[0x7f14284870fb]
rust: domain main @0x16a6db0 root task failed
@jdm
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jdm commented Aug 6, 2013

A gdb backtrace from rust_task_fail would be informative.

@dim-an
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dim-an commented Aug 7, 2013 


#0  rust_task_fail (task=0x7fffec203c80, 
    expr=0x7fffe45cb140 "index out of bounds: the len is 0 but the index is 0", file=0x7ffff62ae1a0 <str65739> "/home/ermolovd/workspace/rust/src/librustc/middle/check_match.rs", line=231)
    at /home/ermolovd/workspace/rust/src/rt/rust_task.cpp:90
#1  0x00007ffff50a0d59 in __morestack ()
   from /home/ermolovd/.local/bin/../lib/librustrt.so
#2  0x00007ffff50917b8 in call_on_c_stack (
    fn_ptr=0x7ffff50910f0 <upcall_s_fail(s_fail_args*)>, args=0x7ffff15f1360, 
    this=0x7fffec203c80)
    at /home/ermolovd/workspace/rust/src/rt/rust_task.h:481
#3  call_upcall_on_c_stack (
    fn_ptr=0x7ffff50910f0 <upcall_s_fail(s_fail_args*)>, args=0x7ffff15f1360, 
    task=<optimized out>)
    at /home/ermolovd/workspace/rust/src/rt/rust_upcall.cpp:51
#4  upcall_fail (expr=<optimized out>, 
    file=0x7ffff62ae1a0 <str65739> "/home/ermolovd/workspace/rust/src/librustc/middle/check_match.rs", line=231)
    at /home/ermolovd/workspace/rust/src/rt/rust_upcall.cpp:134
#5  0x00007ffff77d88d7 in sys::rustrt::rust_upcall_fail::_f25e955198ccc5c0::_0$x2e8$x2dpre ()
   from /home/ermolovd/.local/bin/../lib/libstd-6c65cf4b443341b1-0.8-pre.so
#6  0x00007ffff77d8e61 in sys::begin_unwind_::_89e154cd0915671::_0$x2e8$x2dpre
---Type <return> to continue, or q <return> to quit---
    () from /home/ermolovd/.local/bin/../lib/libstd-6c65cf4b443341b1-0.8-pre.so
#7  0x00007ffff76b2a0e in unstable::lang::fail_::_89e154cd0915671::_0$x2e8$x2dpre () from /home/ermolovd/.local/bin/../lib/libstd-6c65cf4b443341b1-0.8-pre.so
#8  0x00007ffff77ed66a in unstable::lang::fail_bounds_check::anon::expr_fn_26335 () from /home/ermolovd/.local/bin/../lib/libstd-6c65cf4b443341b1-0.8-pre.so
#9  0x00007ffff779fe09 in str::__extensions__::as_c_str_23197::anon::expr_fn_23200 () from /home/ermolovd/.local/bin/../lib/libstd-6c65cf4b443341b1-0.8-pre.so
#10 0x00007ffff770450a in vec::__extensions__::as_imm_buf_15036::_ad5b8a27a3c3790::_0$x2e8$x2dpre ()
   from /home/ermolovd/.local/bin/../lib/libstd-6c65cf4b443341b1-0.8-pre.so
#11 0x00007ffff773274d in str::__extensions__::as_imm_buf_17989::_ad5b8a27a3c3790::_0$x2e8$x2dpre ()
   from /home/ermolovd/.local/bin/../lib/libstd-6c65cf4b443341b1-0.8-pre.so
#12 0x00007ffff779fbc0 in str::__extensions__::as_c_str_23197::_d69de411ee2549::_0$x2e8$x2dpre ()
   from /home/ermolovd/.local/bin/../lib/libstd-6c65cf4b443341b1-0.8-pre.so
#13 0x00007ffff76bf4e1 in unstable::lang::fail_bounds_check::_7112ff25e39642a2::_0$x2e8$x2dpre ()
   from /home/ermolovd/.local/bin/../lib/libstd-6c65cf4b443341b1-0.8-pre.so
#14 0x00007ffff5ca4467 in middle::check_match::is_useful::_1efec9c180b8af3::_0$x2e8$x2dpre ()
   from /home/ermolovd/.local/bin/../lib/librustc-d3cb8c2ccd84a7a7-0.8-pre.so
#15 0x00007ffff5cac580 in middle::check_match::is_useful_specialized::_a8ff93c88---Type <return> to continue, or q <return> to quit---
f76c279::_0$x2e8$x2dpre ()
   from /home/ermolovd/.local/bin/../lib/librustc-d3cb8c2ccd84a7a7-0.8-pre.so
#16 0x00007ffff5ca63bf in middle::check_match::is_useful::_1efec9c180b8af3::_0$x2e8$x2dpre ()
   from /home/ermolovd/.local/bin/../lib/librustc-d3cb8c2ccd84a7a7-0.8-pre.so
#17 0x00007ffff5c9e39b in middle::check_match::check_arms::_1c832619b9e2589c::_0$x2e8$x2dpre ()
   from /home/ermolovd/.local/bin/../lib/librustc-d3cb8c2ccd84a7a7-0.8-pre.so
#18 0x00007ffff5c9b75b in middle::check_match::check_expr::_7a4496e893c2d5d1::_0$x2e8$x2dpre ()
   from /home/ermolovd/.local/bin/../lib/librustc-d3cb8c2ccd84a7a7-0.8-pre.so
#19 0x00007ffff5c9afeb in middle::check_match::check_crate::anon::expr_fn_65576
    ()
   from /home/ermolovd/.local/bin/../lib/librustc-d3cb8c2ccd84a7a7-0.8-pre.so
#20 0x00007ffff5945939 in oldvisit::visit_expr_opt_51892::_18f64827e554d7cd::_0$x2e8$x2dpre ()
   from /home/ermolovd/.local/bin/../lib/librustc-d3cb8c2ccd84a7a7-0.8-pre.so
#21 0x00007ffff59455a1 in oldvisit::visit_block_51889::_e6e619698347db51::_0$x2e8$x2dpre ()
   from /home/ermolovd/.local/bin/../lib/librustc-d3cb8c2ccd84a7a7-0.8-pre.so
#22 0x00007ffff594523f in oldvisit::default_visitor_51839::anon::expr_fn_51887
    ()
   from /home/ermolovd/.local/bin/../lib/librustc-d3cb8c2ccd84a7a7-0.8-pre.so
---Type <return> to continue, or q <return> to quit---
#23 0x00007ffff5950db7 in oldvisit::visit_fn_51940::_d9546aecbdd6eee::_0$x2e8$x2dpre ()
   from /home/ermolovd/.local/bin/../lib/librustc-d3cb8c2ccd84a7a7-0.8-pre.so
#24 0x00007ffff5c9d4c1 in middle::check_match::check_fn::_85bb11c86427ffcc::_0$x2e8$x2dpre ()
   from /home/ermolovd/.local/bin/../lib/librustc-d3cb8c2ccd84a7a7-0.8-pre.so
#25 0x00007ffff5c9d28e in middle::check_match::check_crate::anon::expr_fn_65594
    ()
   from /home/ermolovd/.local/bin/../lib/librustc-d3cb8c2ccd84a7a7-0.8-pre.so
#26 0x00007ffff5942694 in oldvisit::visit_item_51864::_b83b1cc7f1a7ba5b::_0$x2e8$x2dpre ()
   from /home/ermolovd/.local/bin/../lib/librustc-d3cb8c2ccd84a7a7-0.8-pre.so
#27 0x00007ffff5941a23 in oldvisit::default_visitor_51839::anon::expr_fn_51862
    ()
   from /home/ermolovd/.local/bin/../lib/librustc-d3cb8c2ccd84a7a7-0.8-pre.so
#28 0x00007ffff5940cf7 in oldvisit::visit_mod_51844::_6976f7d8c85555ba::_0$x2e8$x2dpre ()
   from /home/ermolovd/.local/bin/../lib/librustc-d3cb8c2ccd84a7a7-0.8-pre.so
#29 0x00007ffff5940884 in oldvisit::default_visitor_51839::anon::expr_fn_51842
    ()
   from /home/ermolovd/.local/bin/../lib/librustc-d3cb8c2ccd84a7a7-0.8-pre.so
#30 0x00007ffff56e82be in oldvisit::visit_crate_37522::_f46a3e54d45a1f4::_0$x2e8$x2dpre ()
---Type <return> to continue, or q <return> to quit---
   from /home/ermolovd/.local/bin/../lib/librustc-d3cb8c2ccd84a7a7-0.8-pre.so
#31 0x00007ffff5c9a81a in middle::check_match::check_crate::_3edff8522e9cc9ee::_0$x2e8$x2dpre ()
   from /home/ermolovd/.local/bin/../lib/librustc-d3cb8c2ccd84a7a7-0.8-pre.so
#32 0x00007ffff621d836 in driver::driver::phase_3_run_analysis_passes::anon::expr_fn_95862 ()
   from /home/ermolovd/.local/bin/../lib/librustc-d3cb8c2ccd84a7a7-0.8-pre.so
#33 0x00007ffff5c7f5d9 in util::common::time_65127::_c4d0513e54dc658e::_0$x2e8$x2dpre ()
   from /home/ermolovd/.local/bin/../lib/librustc-d3cb8c2ccd84a7a7-0.8-pre.so
#34 0x00007ffff621ac5b in driver::driver::phase_3_run_analysis_passes::_1b99c65643aa108b::_0$x2e8$x2dpre ()
   from /home/ermolovd/.local/bin/../lib/librustc-d3cb8c2ccd84a7a7-0.8-pre.so
#35 0x00007ffff6220904 in driver::driver::compile_input::_4c53e9c6f69a01::_0$x2e8$x2dpre ()
   from /home/ermolovd/.local/bin/../lib/librustc-d3cb8c2ccd84a7a7-0.8-pre.so
#36 0x00007ffff625c637 in run_compiler::_0184613adfc5db9::_0$x2e8$x2dpre ()
   from /home/ermolovd/.local/bin/../lib/librustc-d3cb8c2ccd84a7a7-0.8-pre.so
#37 0x00007ffff62984ea in main::anon::expr_fn_101643 ()
   from /home/ermolovd/.local/bin/../lib/librustc-d3cb8c2ccd84a7a7-0.8-pre.so
#38 0x00007ffff629248c in monitor::anon::expr_fn_101401 ()
   from /home/ermolovd/.local/bin/../lib/librustc-d3cb8c2ccd84a7a7-0.8-pre.so
#39 0x00007ffff627fe06 in task::__extensions__::try_100268::anon::expr_fn_100686---Type <return> to continue, or q <return> to quit---
 () from /home/ermolovd/.local/bin/../lib/librustc-d3cb8c2ccd84a7a7-0.8-pre.so
#40 0x00007ffff778baf7 in task::spawn::spawn_raw_oldsched::make_child_wrapper::anon::expr_fn_22464 ()
   from /home/ermolovd/.local/bin/../lib/libstd-6c65cf4b443341b1-0.8-pre.so
#41 0x00007ffff50900fb in task_start_wrapper (a=0x7ffff15f8820)
    at /home/ermolovd/workspace/rust/src/rt/rust_task.cpp:162
#42 0x0000000000000000 in ?? ()

@dim-an dim-an mentioned this issue Oct 7, 2013
Closed
bors added a commit that referenced this issue Oct 8, 2013
@bors
auto merge of #9747 : dim-an/rust/fix-match, r=alexcrichton
1320999 
When `specialize`ing struct-like enum patterns, compare struct fields to
pattern fields, not pattern fields to pattern fields.

Closes #8351.
@bors bors closed this as completed in da7f411 Oct 8, 2013
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I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️
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Fix bug in match checking
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@jdm @dim-an