MIR related ICE: Title N/A

[MagaTailor]

Continuing from #33295 (comment) but using a newer rustc (0eb575c70):

$ cargo bench

Compiling ethcore-util v1.1.0 (file:///parity-master/util)
     Running `rustc src/lib.rs --crate-name ethcore_util --crate-type lib -C opt-level=3 --test --cfg feature=\"default\" -C metadata=d7bb43a68be26600 -C extra-filename=-d7bb43a68be26600 --out-dir /parity-master/util/target/release --emit=dep-info,link -L dependency=/parity-master/util/target/release -L dependency=/parity-master/util/target/release/deps --extern bigint=/parity-master/util/target/release/deps/libbigint-3af9bccf4cd0f92f.rlib --extern secp256k1=/parity-master/util/target/release/deps/libsecp256k1-86d36dad8b611fad.rlib --extern vergen=/parity-master/util/target/release/deps/libvergen-8849548184b2c7f0.rlib --extern sha3=/parity-master/util/target/release/deps/libsha3-1c705ec8c3fdae56.rlib --extern rustc_serialize=/parity-master/util/target/release/deps/librustc_serialize-fae78eec3acaace8.rlib --extern json_tests=/parity-master/util/target/release/deps/libjson_tests-b716cb4e63aac8b2.rlib --extern mio=/parity-master/util/target/release/deps/libmio-e45a6ae4d1161877.rlib --extern target_info=/parity-master/util/target/release/deps/libtarget_info-da75b3c3599c81c8.rlib --extern heapsize=/parity-master/util/target/release/deps/libheapsize-c012ad7d8237b492.rlib --extern ethcore_devtools=/parity-master/util/target/release/deps/libethcore_devtools-f57f591ef275f5ea.rlib --extern chrono=/parity-master/util/target/release/deps/libchrono-62ec1dcf7b159155.rlib --extern serde=/parity-master/util/target/release/deps/libserde-318c848ff88e32a6.rlib --extern rocksdb=/parity-master/util/target/release/deps/librocksdb-11162a88a6474d31.rlib --extern nix=/parity-master/util/target/release/deps/libnix-2c6b863dcb858f52.rlib --extern elastic_array=/parity-master/util/target/release/deps/libelastic_array-589122b7f1ef7c07.rlib --extern arrayvec=/parity-master/util/target/release/deps/libarrayvec-71b744037db98790.rlib --extern libc=/parity-master/util/target/release/deps/liblibc-5933dd204e100e52.rlib --extern itertools=/parity-master/util/target/release/deps/libitertools-94cd1086a826f04d.rlib --extern lazy_static=/parity-master/util/target/release/deps/liblazy_static-3abedd3a16ccd1da.rlib --extern env_logger=/parity-master/util/target/release/deps/libenv_logger-f94c1b2ff9566cda.rlib --extern slab=/parity-master/util/target/release/deps/libslab-db9531985f79ac28.rlib --extern crossbeam=/parity-master/util/target/release/deps/libcrossbeam-9ca62babdd3d1bee.rlib --extern crypto=/parity-master/util/target/release/deps/libcrypto-ac6c16f85009915d.rlib --extern tiny_keccak=/parity-master/util/target/release/deps/libtiny_keccak-cfb038c12975725b.rlib --extern log=/parity-master/util/target/release/deps/liblog-2b82a1c4336f2800.rlib --extern rand=/parity-master/util/target/release/deps/librand-5eeeaee7d2bbe2c4.rlib --extern igd=/parity-master/util/target/release/deps/libigd-b00c808cc940167e.rlib --extern time=/parity-master/util/target/release/deps/libtime-dd3c04dda4811bc8.rlib -L native=/parity-master/util/target/release/build/eth-secp256k1-7da4f57de38836b0/out -L native=/parity-master/util/target/release/build/sha3-faf8719ff3d3472e/out -L native=/parity-master/util/target/release/build/librocksdb-sys-47ecb6d53251ddb7/out/lib -L native=/parity-master/util/target/release/build/rust-crypto-727792a5f63543d1/out`

RUSTFLAGS = -C target-cpu=cortex-a5 -C target-feature=+vfp4,+neon -C llvm-args=-force-target-max-vector-interleave=4 -C codegen-units=1 -C link-args=-s -Z orbit

Error:

error: internal compiler error: src/librustc_trans/common.rs:1102: Encountered error `Unimplemented` selecting `Binder(<network::host::Host<network::tests::TestProtocolMessage> as io::IoHandler<network::host::NetworkIoMessage<Message>>>)` during trans

thread 'rustc' panicked at 'Box<Any>', src/libsyntax/errors/mod.rs:537

Any suggestions on how to narrow it down welcome. Please edit the title to reflect the problem.

[MagaTailor]

Oh, I wasn't aware I could use a non-MIR bootstrapped rustc. I'll try using my special debug build (only a third time it will have been used, lucky?)

[nagisa]

Is there a backtrace? (environment variable RUST_BACKTRACE = 1)

[MagaTailor]

No trace, obviously.

Ok, my debug build from Apr 7th managed to hit an assertion but it's the same as:

#32360 (comment)

It's not clear to me if it'd been fixed before that date (470ca1c3f) but it's probably not the issue we were looking for. I'll post a backtrace shortly.

[MagaTailor]

The compilation finished ok without mir so it must be it:

(gdb) bt
#0  __libc_do_syscall () at ../ports/sysdeps/unix/sysv/linux/arm/libc-do-syscall.S:44
#1  0xb661bf5e in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
#2  0xb661e7b6 in __GI_abort () at abort.c:89
#3  0xb6617190 in __assert_fail_base (fmt=0x1 <error: Cannot access memory at address 0x1>, 
    assertion=0xb4cb3bdc "getOperand(0)->getType() == cast<PointerType>(getOperand(1)->getType())->getElementType() && \"Ptr must be a pointer to Val type!\"", assertion@entry=0x0, 
    file=0xb4cb2f84 "src/llvm/lib/IR/Instructions.cpp", file@entry=0xb04bd2b0 "\001", line=1304, line@entry=3060637860, 
    function=function@entry=0xb4cb712c <llvm::StoreInst::AssertOK()::__PRETTY_FUNCTION__> "void llvm::StoreInst::AssertOK()")
    at assert.c:92
#4  0xb6617226 in __GI___assert_fail (assertion=0x0, file=0xb04bd2b0 "\001", line=3060637860, 
    function=0xb4cb712c <llvm::StoreInst::AssertOK()::__PRETTY_FUNCTION__> "void llvm::StoreInst::AssertOK()") at assert.c:101
#5  0xb3f82f14 in llvm::StoreInst::AssertOK() () from /../lib/librustc_llvm-9026086f.so
#6  0xb3f83150 in llvm::StoreInst::StoreInst(llvm::Value*, llvm::Value*, bool, unsigned int, llvm::AtomicOrdering, llvm::SynchronizationScope, llvm::Instruction*) () from /../lib/librustc_llvm-9026086f.so
#7  0xb3f83198 in llvm::StoreInst::StoreInst(llvm::Value*, llvm::Value*, bool, unsigned int, llvm::Instruction*) ()
   from /../lib/librustc_llvm-9026086f.so
#8  0xb3f831c4 in llvm::StoreInst::StoreInst(llvm::Value*, llvm::Value*, bool, llvm::Instruction*) ()
   from /../lib/librustc_llvm-9026086f.so
#9  0xb3ddfcd4 in LLVMBuildStore () from /../lib/librustc_llvm-9026086f.so
#10 0xb60e9578 in rustc_trans::builder::{{impl}}::store (self=0xb0496e18, val=0x898fac5c, ptr=0x898ce3f4)
    at src/librustc_trans/builder.rs:546
#11 0xb611b9f0 in rustc_trans::build::Store (cx=0x90285930, val=0x898fac5c, ptr=0x898ce3f4) at src/librustc_trans/build.rs:680
#12 0xb61706d4 in rustc_trans::base::store_fat_ptr (cx=0x90285930, data=0x898fac5c, extra=0x8981f81c, dst=0x898fabc4, _ty=0x986948d8)
    at src/librustc_trans/base.rs:978
#13 0xb616fcb0 in rustc_trans::base::coerce_unsized_into (bcx=0x90285930, src=0x898fab1c, src_ty=0x979099dc, dst=0x898fabc4, 
    dst_ty=0x986948d8) at src/librustc_trans/base.rs:626
#14 0xb6170504 in rustc_trans::base::coerce_unsized_into (bcx=0x90285930, src=0x898faa6c, src_ty=0x979099f8, dst=0x898faac4, 
    dst_ty=0x986948f4) at src/librustc_trans/base.rs:659
#15 0xb6170504 in rustc_trans::base::coerce_unsized_into (bcx=0x90285930, src=0x8981f784, src_ty=0x979099c0, dst=0x8981f7dc, 
    dst_ty=0x986947c0) at src/librustc_trans/base.rs:659
#16 0xb6170504 in rustc_trans::base::coerce_unsized_into (bcx=0x90285930, src=0x90294edc, src_ty=0x97909854, dst=0x90287974, 
    dst_ty=0xaa6a213c) at src/librustc_trans/base.rs:659
#17 0xb6450d18 in fnfn (bcx=0x90285930) at src/librustc_trans/mir/rvalue.rs:89
#18 0xb6450bc4 in rustc_trans::common::{{impl}}::with_block<closure,()> (self=0xb0498778, f=...) at src/librustc_trans/common.rs:664
#19 0xb644d11c in rustc_trans::mir::rvalue::{{impl}}::trans_rvalue (self=0xb0499ce4, bcx=..., dest=..., rvalue=0x94199f50)
    at src/librustc_trans/mir/rvalue.rs:71
#20 0xb6441d2c in rustc_trans::mir::statement::{{impl}}::trans_statement (self=0xb0499ce4, bcx=..., statement=0x94199f30)
    at src/librustc_trans/mir/statement.rs:31
#21 0xb643797c in rustc_trans::mir::block::{{impl}}::trans_block (self=0xb0499ce4, bb=...) at src/librustc_trans/mir/block.rs:54
#22 0xb61aea7c in rustc_trans::mir::trans_mir (fcx=0xb049a318) at src/librustc_trans/mir/mod.rs:172
#23 0xb61ab9f8 in rustc_trans::base::trans_closure (ccx=0xb04b4e9c, decl=0xab0a5bb8, body=0xab0acd70, llfndecl=0x90293ae4, 
    param_substs=0xabb90360, def_id=..., inlined_id=99852, fn_ty=..., abi=Rust, closure_env=...) at src/librustc_trans/base.rs:1837
#24 0xb61b0444 in rustc_trans::base::trans_fn (ccx=0xb04b4e9c, decl=0xab0a5bb8, body=0xab0acd70, llfndecl=0x90293ae4, 
    param_substs=0xabb90360, id=99852) at src/librustc_trans/base.rs:1921
#25 0xb626bd3c in rustc_trans::monomorphize::monomorphic_fn (ccx=0xb04b4e9c, fn_id=..., psubsts=0xabb90360)
    at src/librustc_trans/monomorphize.rs:138
#26 0xb625df64 in rustc_trans::callee::get_fn (ccx=0xb04b4e9c, def_id=..., substs=0xabb90360) at src/librustc_trans/callee.rs:478
#27 0xb625c9a8 in rustc_trans::callee::{{impl}}::trait_method (ccx=0xb04b4e9c, def_id=..., substs=0x96463898)
    at src/librustc_trans/callee.rs:173
#28 0xb616c8b4 in rustc_trans::callee::{{impl}}::def (ccx=0xb04b4e9c, def_id=..., substs=0x96463898)
    at src/librustc_trans/callee.rs:118
#29 0xb6438fcc in rustc_trans::mir::block::{{impl}}::trans_block (self=0xb049d6fc, bb=...) at src/librustc_trans/mir/block.rs:161
#30 0xb61aea7c in rustc_trans::mir::trans_mir (fcx=0xb049dd30) at src/librustc_trans/mir/mod.rs:172
#31 0xb61ab9f8 in rustc_trans::base::trans_closure (ccx=0xb04b4e9c, decl=0x902ca018, body=0x902e0410, llfndecl=0x90280f84, 
    param_substs=0x96463848, def_id=..., inlined_id=4619003, fn_ty=..., abi=Rust, closure_env=...) at src/librustc_trans/base.rs:1837
#32 0xb61b0444 in rustc_trans::base::trans_fn (ccx=0xb04b4e9c, decl=0x902ca018, body=0x902e0410, llfndecl=0x90280f84, 
    param_substs=0x96463848, id=4619003) at src/librustc_trans/base.rs:1921
#33 0xb626bd3c in rustc_trans::monomorphize::monomorphic_fn (ccx=0xb04b4e9c, fn_id=..., psubsts=0x96463848)
    at src/librustc_trans/monomorphize.rs:138
#34 0xb625df64 in rustc_trans::callee::get_fn (ccx=0xb04b4e9c, def_id=..., substs=0x96463848) at src/librustc_trans/callee.rs:478
#35 0xb616ca4c in rustc_trans::callee::{{impl}}::def (ccx=0xb04b4e9c, def_id=..., substs=0x96463848)
    at src/librustc_trans/callee.rs:140
#36 0xb6438fcc in rustc_trans::mir::block::{{impl}}::trans_block (self=0xb04a0d0c, bb=...) at src/librustc_trans/mir/block.rs:161
#37 0xb61aea7c in rustc_trans::mir::trans_mir (fcx=0xb04a1340) at src/librustc_trans/mir/mod.rs:172
#38 0xb61ab9f8 in rustc_trans::base::trans_closure (ccx=0xb04b4e9c, decl=0x89fedff0, body=0x9025b440, llfndecl=0x9025b9e4, 
    param_substs=0x96463848, def_id=..., inlined_id=4617005, fn_ty=..., abi=Rust, closure_env=...) at src/librustc_trans/base.rs:1837
#39 0xb61b0444 in rustc_trans::base::trans_fn (ccx=0xb04b4e9c, decl=0x89fedff0, body=0x9025b440, llfndecl=0x9025b9e4, 
    param_substs=0x96463848, id=4617005) at src/librustc_trans/base.rs:1921
#40 0xb626bd3c in rustc_trans::monomorphize::monomorphic_fn (ccx=0xb04b4e9c, fn_id=..., psubsts=0x96463848)
    at src/librustc_trans/monomorphize.rs:138
#41 0xb625df64 in rustc_trans::callee::get_fn (ccx=0xb04b4e9c, def_id=..., substs=0x96463848) at src/librustc_trans/callee.rs:478
#42 0xb616ca4c in rustc_trans::callee::{{impl}}::def (ccx=0xb04b4e9c, def_id=..., substs=0x96463848)
    at src/librustc_trans/callee.rs:140
#43 0xb6438fcc in rustc_trans::mir::block::{{impl}}::trans_block (self=0xb04a431c, bb=...) at src/librustc_trans/mir/block.rs:161
#44 0xb61aea7c in rustc_trans::mir::trans_mir (fcx=0xb04a4950) at src/librustc_trans/mir/mod.rs:172
#45 0xb61ab9f8 in rustc_trans::base::trans_closure (ccx=0xb04b4e9c, decl=0x90254c28, body=0x90240db0, llfndecl=0x90240fac, 
    param_substs=0x96463848, def_id=..., inlined_id=4616960, fn_ty=..., abi=Rust, closure_env=...) at src/librustc_trans/base.rs:1837
#46 0xb61b0444 in rustc_trans::base::trans_fn (ccx=0xb04b4e9c, decl=0x90254c28, body=0x90240db0, llfndecl=0x90240fac, 
    param_substs=0x96463848, id=4616960) at src/librustc_trans/base.rs:1921
#47 0xb626bd3c in rustc_trans::monomorphize::monomorphic_fn (ccx=0xb04b4e9c, fn_id=..., psubsts=0x96463848)
    at src/librustc_trans/monomorphize.rs:138
#48 0xb625df64 in rustc_trans::callee::get_fn (ccx=0xb04b4e9c, def_id=..., substs=0x96463848) at src/librustc_trans/callee.rs:478
#49 0xb616ca4c in rustc_trans::callee::{{impl}}::def (ccx=0xb04b4e9c, def_id=..., substs=0x96463848)
    at src/librustc_trans/callee.rs:140
#50 0xb6438fcc in rustc_trans::mir::block::{{impl}}::trans_block (self=0xb04a792c, bb=...) at src/librustc_trans/mir/block.rs:161
#51 0xb61aea7c in rustc_trans::mir::trans_mir (fcx=0xb04a7f60) at src/librustc_trans/mir/mod.rs:172
#52 0xb61ab9f8 in rustc_trans::base::trans_closure (ccx=0xb04b4e9c, decl=0xab09cb78, body=0xab09f608, llfndecl=0x89f1f2dc, 
    param_substs=0xabb90360, def_id=..., inlined_id=99459, fn_ty=..., abi=Rust, closure_env=...) at src/librustc_trans/base.rs:1837
#53 0xb61b0444 in rustc_trans::base::trans_fn (ccx=0xb04b4e9c, decl=0xab09cb78, body=0xab09f608, llfndecl=0x89f1f2dc, 
    param_substs=0xabb90360, id=99459) at src/librustc_trans/base.rs:1921
#54 0xb626bd3c in rustc_trans::monomorphize::monomorphic_fn (ccx=0xb04b4e9c, fn_id=..., psubsts=0xabb90360)
    at src/librustc_trans/monomorphize.rs:138
#55 0xb625df64 in rustc_trans::callee::get_fn (ccx=0xb04b4e9c, def_id=..., substs=0xabb90360) at src/librustc_trans/callee.rs:478
#56 0xb616ca4c in rustc_trans::callee::{{impl}}::def (ccx=0xb04b4e9c, def_id=..., substs=0xabb90360)
    at src/librustc_trans/callee.rs:140
#57 0xb6438fcc in rustc_trans::mir::block::{{impl}}::trans_block (self=0xb04aaf3c, bb=...) at src/librustc_trans/mir/block.rs:161
#58 0xb61aea7c in rustc_trans::mir::trans_mir (fcx=0xb04ab570) at src/librustc_trans/mir/mod.rs:172
#59 0xb61ab9f8 in rustc_trans::base::trans_closure (ccx=0xb04b4e9c, decl=0xb04ac31c, body=0xb04ac2fc, llfndecl=0x89f1167c, 
    param_substs=0xabb90360, def_id=..., inlined_id=4294967295, fn_ty=..., abi=RustCall, closure_env=...)
    at src/librustc_trans/base.rs:1837
#60 0xb62a080c in rustc_trans::closure::trans_closure_expr (dest=..., decl=0xb04ac31c, body=0xb04ac2fc, id=4294967295, 
    closure_def_id=..., closure_substs=0xb04ac2e4) at src/librustc_trans/closure.rs:239
#61 0xb644d900 in rustc_trans::mir::rvalue::{{impl}}::trans_rvalue (self=0xb04adbdc, bcx=..., dest=..., rvalue=0x941c0a48)
    at src/librustc_trans/mir/rvalue.rs:143
#62 0xb6441d2c in rustc_trans::mir::statement::{{impl}}::trans_statement (self=0xb04adbdc, bcx=..., statement=0x941c0a28)
    at src/librustc_trans/mir/statement.rs:31
#63 0xb643797c in rustc_trans::mir::block::{{impl}}::trans_block (self=0xb04adbdc, bb=...) at src/librustc_trans/mir/block.rs:54
#64 0xb61aea7c in rustc_trans::mir::trans_mir (fcx=0xb04ae210) at src/librustc_trans/mir/mod.rs:172
#65 0xb61ab9f8 in rustc_trans::base::trans_closure (ccx=0xb04b4e9c, decl=0xb04aefbc, body=0xb04aef9c, llfndecl=0x8a1b4874, 
    param_substs=0xabb90360, def_id=..., inlined_id=4294967295, fn_ty=..., abi=RustCall, closure_env=...)
    at src/librustc_trans/base.rs:1837
#66 0xb62a080c in rustc_trans::closure::trans_closure_expr (dest=..., decl=0xb04aefbc, body=0xb04aef9c, id=4294967295, 
    closure_def_id=..., closure_substs=0xb04aef84) at src/librustc_trans/closure.rs:239
#67 0xb644d900 in rustc_trans::mir::rvalue::{{impl}}::trans_rvalue (self=0xb04b087c, bcx=..., dest=..., rvalue=0x941c0f88)
    at src/librustc_trans/mir/rvalue.rs:143
#68 0xb6441d2c in rustc_trans::mir::statement::{{impl}}::trans_statement (self=0xb04b087c, bcx=..., statement=0x941c0f68)
    at src/librustc_trans/mir/statement.rs:31
#69 0xb643797c in rustc_trans::mir::block::{{impl}}::trans_block (self=0xb04b087c, bb=...) at src/librustc_trans/mir/block.rs:54
#70 0xb61aea7c in rustc_trans::mir::trans_mir (fcx=0xb04b0eb0) at src/librustc_trans/mir/mod.rs:172
#71 0xb61ab9f8 in rustc_trans::base::trans_closure (ccx=0xb04b4e9c, decl=0xab0b39e8, body=0xab0b5010, llfndecl=0x8a135914, 
    param_substs=0xabb90360, def_id=..., inlined_id=100311, fn_ty=..., abi=Rust, closure_env=...) at src/librustc_trans/base.rs:1837
#72 0xb61b0444 in rustc_trans::base::trans_fn (ccx=0xb04b4e9c, decl=0xab0b39e8, body=0xab0b5010, llfndecl=0x8a135914, 
    param_substs=0xabb90360, id=100311) at src/librustc_trans/base.rs:1921
#73 0xb626bd3c in rustc_trans::monomorphize::monomorphic_fn (ccx=0xb04b4e9c, fn_id=..., psubsts=0xabb90360)
    at src/librustc_trans/monomorphize.rs:138
#74 0xb625df64 in rustc_trans::callee::get_fn (ccx=0xb04b4e9c, def_id=..., substs=0xabb90360) at src/librustc_trans/callee.rs:478
#75 0xb616ca4c in rustc_trans::callee::{{impl}}::def (ccx=0xb04b4e9c, def_id=..., substs=0xabb90360)
    at src/librustc_trans/callee.rs:140
#76 0xb6438fcc in rustc_trans::mir::block::{{impl}}::trans_block (self=0xb04b3e8c, bb=...) at src/librustc_trans/mir/block.rs:161
#77 0xb61aea7c in rustc_trans::mir::trans_mir (fcx=0xb04b44c0) at src/librustc_trans/mir/mod.rs:172
#78 0xb61ab9f8 in rustc_trans::base::trans_closure (ccx=0xb04b4e9c, decl=0xab0d0a38, body=0xab0d10a0, llfndecl=0x8a1a118c, 
    param_substs=0xabd1cb08, def_id=..., inlined_id=101483, fn_ty=..., abi=Rust, closure_env=...) at src/librustc_trans/base.rs:1837
#79 0xb61b0444 in rustc_trans::base::trans_fn (ccx=0xb04b4e9c, decl=0xab0d0a38, body=0xab0d10a0, llfndecl=0x8a1a118c, 
    param_substs=0xabd1cb08, id=101483) at src/librustc_trans/base.rs:1921
#80 0xb61cde18 in rustc_trans::base::trans_item (ccx=0xb04b53e4, item=0xab0d04bc) at src/librustc_trans/base.rs:2268
#81 0xb62236d0 in fnfn () at src/librustc_trans/base.rs:2928
#82 0xb62235ec in rustc_trans::dep_graph::{{impl}}::with_task<closure,()> (self=0xb04b7c28, key=..., op=...)
    at src/librustc/dep_graph/mod.rs:165
#83 0xb6223534 in rustc_trans::base::{{impl}}::visit_item (self=0xb04b53dc, i=0xab0d04bc) at src/librustc_trans/base.rs:2918
#84 0xb620daf0 in rustc_trans::base::{{impl}}::visit_nested_item (self=0xb04b53dc, item_id=...) at src/librustc_trans/base.rs:2904
#85 0xb620d66c in rustc_trans::hir::intravisit::walk_mod<rustc_trans::base::TransItemsWithinModVisitor> (visitor=0xb04b53dc, 
    module=0xab0cca38) at src/librustc/hir/intravisit.rs:239
#86 0xb62219b0 in rustc_trans::hir::intravisit::Visitor::visit_mod<rustc_trans::base::TransItemsWithinModVisitor> (self=0xb04b53dc, 
    m=0xab0cca38, _s=..., _n=101332) at src/librustc/hir/intravisit.rs:104
#87 0xb621be8c in rustc_trans::hir::intravisit::walk_item<rustc_trans::base::TransItemsWithinModVisitor> (visitor=0xb04b53dc, 
    item=0xab0cca24) at src/librustc/hir/intravisit.rs:335
#88 0xb620dc20 in rustc_trans::base::{{impl}}::visit_item (self=0xb04b5ce8, i=0xab0cca24) at src/librustc_trans/base.rs:2889
#89 0xb620db88 in rustc_trans::hir::{{impl}}::visit_all_items<rustc_trans::base::TransModVisitor> (self=0xb04b9c8c, visitor=0xb04b5ce8)
    at src/librustc/hir/mod.rs:480
#90 0xb61e75ac in rustc_trans::base::trans_crate (tcx=0xb04b7bd4, mir_map=0xb04b63e4, analysis=...) at src/librustc_trans/base.rs:2760
#91 0xb6e82d74 in fnfn () at src/librustc_driver/driver.rs:957
#92 0xb6e82748 in rustc_driver::util::common::time<rustc_trans::CrateTranslation,closure> (do_it=false, what=..., f=...)
    at src/librustc/util/common.rs:38
#93 0xb6cb6b9c in rustc_driver::driver::phase_4_translate_to_llvm (tcx=0xb04b7bd4, mir_map=..., analysis=...)
    at src/librustc_driver/driver.rs:955
#94 0xb6ca9670 in fnfn (tcx=0xb04b7bd4, mir_map=..., analysis=..., result=...) at src/librustc_driver/driver.rs:206
#95 0xb6c7e1f0 in fnfn (tcx=0xb04b7bd4) at src/librustc_driver/driver.rs:930
#96 0xb6c7d3b4 in rustc::ty::context::tls::enter::_$u7b$$u7b$closure$u7d$$u7d$::_$u7b$$u7b$closure$u7d$$u7d$::hdb0fc61b0612e833 ()
    at src/librustc_driver/driver.rs:816
#97 0xb6c7d230 in rustc_driver::thread::local::{{impl}}::with<closure,core::result::Result<core::result::Result<(rustc::session::config::OutputFilenames, rustc_trans::CrateTranslation), usize>, usize>> (
    self=0xb1f8ad54 <rustc::ty::context::tls::TLS_TCX::h75f0323020f314c8>, f=...) at src/libstd/thread/local.rs:211
#98 0xb6c7cd74 in rustc::ty::context::tls::enter::_$u7b$$u7b$closure$u7d$$u7d$::h1cd1ae180cde5f0d ()
    at src/librustc_driver/driver.rs:816
#99 0xb6c7cbf0 in rustc_driver::thread::local::{{impl}}::with<closure,core::result::Result<core::result::Result<(rustc::session::config::OutputFilenames, rustc_trans::CrateTranslation), usize>, usize>> (self=0xb0f68d58 <syntax::codemap::SPAN_DEBUG::h6236c52aef672e24>, 
    f=...) at src/libstd/thread/local.rs:211
#100 0xb6c7ca20 in rustc_driver::ty::context::tls::enter<closure,core::result::Result<core::result::Result<(rustc::session::config::OutputFilenames, rustc_trans::CrateTranslation), usize>, usize>> (tcx=..., f=...) at src/librustc/ty/context.rs:660
#101 0xb6c7996c in rustc_driver::ty::context::{{impl}}::create_and_enter<closure,core::result::Result<core::result::Result<(rustc::sessi
on::config::OutputFilenames, rustc_trans::CrateTranslation), usize>, usize>> (s=0xb04baf10, arenas=0xb04b9bb8, def_map=..., 
    named_region_map=..., map=..., freevars=..., region_maps=..., lang_items=..., stability=..., crate_name=..., f=...)
    at src/librustc/ty/context.rs:538
#102 0xb6c6b018 in rustc_driver::driver::phase_3_run_analysis_passes<closure,core::result::Result<(rustc::session::config::OutputFilenames, rustc_trans::CrateTranslation), usize>> (sess=0xb04baf10, cstore=0xafb16700, hir_map=..., arenas=0xb04b9bb8, name=..., 
    make_glob_map=No, f=...) at src/librustc_driver/driver.rs:820
#103 0xb6c00328 in rustc_driver::driver::compile_input (sess=0xb04baf10, cstore=0xafb16700, cfg=..., input=0xb04bb6a8, 
    outdir=0xb04bb794, output=0xb04bb788, addl_plugins=..., control=0xb04ba4ec) at src/librustc_driver/driver.rs:172
#104 0xb6be3e98 in rustc_driver::run_compiler (args=..., callbacks=...) at src/librustc_driver/lib.rs:213
#105 0xb6be07b8 in fnfn () at src/librustc_driver/lib.rs:132
#106 0xb6bde8d0 in fnfn () at src/librustc_driver/lib.rs:997
#107 0xb6bde3a8 in std::thread::Builder::spawn::_$u7b$$u7b$closure$u7d$$u7d$::_$u7b$$u7b$closure$u7d$$u7d$::h71e29f932f68a9c9 ()
    at src/libstd/sys/common/mutex.rs:28
#108 0xb6bde340 in rustc_driver::sys_common::unwind::try::try_fn<closure> (opt_closure=0xb04bcb08 "")
    at src/libstd/sys/common/unwind/mod.rs:127
#109 0xb6857d6c in __rust_try () from /../lib/libstd-9026086f.so
#110 0xb6857a54 in fnfn (s=0xb04bd7a8) at src/libstd/sys/common/unwind/mod.rs:148
#111 0xb6857950 in std::thread::local::{{impl}}::with<closure,core::result::Result<(), Box<Any>>> (
    self=0xb69bcab0 <std::panicking::PANIC_COUNT::hb97300d99929c675>, f=...) at src/libstd/thread/local.rs:211
#112 0xb6857858 in std::sys_common::unwind::inner_try (f=0xb6bde308 <rustc_driver::sys_common::unwind::try::try_fn<closure>>, 
    data=0xb04bcb08 "") at src/libstd/sys/common/unwind/mod.rs:133
#113 0xb6bde2a8 in rustc_driver::sys_common::unwind::try<closure> (f=...) at src/libstd/sys/common/unwind/mod.rs:123
#114 0xb6bde154 in std::thread::Builder::spawn::_$u7b$$u7b$closure$u7d$$u7d$::h98fc4c71843fb136 () at src/libstd/sys/common/mutex.rs:28
#115 0xb6bdeba8 in rustc_driver::boxed::{{impl}}::call_box (self=0x7f5725a0, args=0) at src/liballoc/boxed.rs:541
#116 0xb6846a38 in std::boxed::{{impl}}::call_once (self=..., args=0) at src/liballoc/boxed.rs:550
#117 0xb6854fb8 in std::sys_common::thread::start_thread (main=0x7f572660) at src/libstd/sys/common/thread.rs:23
#118 0xb6892798 in std::sys::thread::{{impl}}::new::thread_start (main=0x7f572660) at src/libstd/sys/unix/thread.rs:74
#119 0xb07dafbc in start_thread (arg=0xb04bd2b0) at pthread_create.c:314
#120 0xb668951c in ?? () at ../ports/sysdeps/unix/sysv/linux/arm/nptl/../clone.S:92 from /lib/arm-linux-gnueabihf/libc.so.6

[nagisa]

Okay so this is casting

network::host::Host<network::tests::TestProtocolMessage>

to

io::IoHandler<network::host::NetworkIoMessage<Message>>,

where io::IoHandler is a trait, and Host<T> is a concrete struct. This, I think, hits this code.

[nagisa]

@petevine is this still reproducible with a nightly?

I know I could reproduce it before, but cannot anymore with the nightly from 2016-05-07)

[MagaTailor]

I hope you didn't forget to use -Z orbit :)

Tested rustc (50909f2 2016-05-08) duly crashes:

$ RUST_BACKTRACE=1 cargo build --release -p ethcore
   Compiling ethcore v1.2.0 (file:///parity-master/ethcore)
ethcore/src/trace/db.rs:25:12: 25:21 warning: unused import, #[warn(unused_imports)] on by default
ethcore/src/trace/db.rs:25 use util::{FixedHash, H256, H264, Database, DBTransaction};
                                      ^~~~~~~~~
error: internal compiler error: src/librustc_trans/common.rs:1102: Encountered error `Unimplemented` selecting `Binder(<util::network::host::Host<service::SyncMessage> as util::IoHandler<util::NetworkIoMessage<Message>>>)` during trans
Segmentation fault
error: Could not compile `ethcore`.

[eddyb]

@petevine is Message a type parameter by any chance? Because then I think #33488 applies.

[MagaTailor]

According to the source links @nagisa provided, like this one, it is.

[MagaTailor]

Today's x86 nightly, compiling release+debug, printed this:

 Stored value type does not match pointer operand type!
  store %"5.alloc::arc::ArcInner<util::IoHandler<util::NetworkIoMessage<service::SyncMessage>> + Send + 'static>"* %151, %"5.alloc::arc::ArcInner<util::IoHandler<util::NetworkIoMessage<service::SyncMessage>> + 'static>"** %154, !dbg !169276
 %"5.alloc::arc::ArcInner<util::IoHandler<util::NetworkIoMessage<service::SyncMessage>> + 'static>"*LLVM ERROR: Broken function found, compilation aborted!

@eddyb Looks like that PR didn't help?

[eddyb]

@petevine It did in that your code lowers now to LLVM IR, just not the correct LLVM IR.
What's going on is that Arc<Trait+Send> -> Arc<Trait> doesn't handle the LLVM type changing.
This is not a problem for simpler fat pointers because we don't create named struct types for those so they just all use the same tuple type or get passed as two separate values.
The fix should be just an extra pointer cast (in MIR trans).

[MagaTailor]

I see; should I close or is there going to be a transparent fix in the future?

[eddyb]

I'll try to do this in the following days, please keep open for tracking.