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SIGSEGV compiling stdweb, but only sometimes. #53083

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Deedasmi opened this issue Aug 5, 2018 · 1 comment
Closed

SIGSEGV compiling stdweb, but only sometimes. #53083

Deedasmi opened this issue Aug 5, 2018 · 1 comment
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A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. C-bug Category: This is a bug. I-crash Issue: The compiler crashes (SIGSEGV, SIGABRT, etc). Use I-ICE instead when the compiler panics. O-wasm Target: WASM (WebAssembly), http://webassembly.org/

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@Deedasmi
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Deedasmi commented Aug 5, 2018 •
edited

Segfault happens randomly. While running cargo clean followed by building, and repeating both several times in a row may produce the segfault 20-40% of the time.

rustc 1.30.0-nightly (3edb355 2018-08-03)
cargo 1.29.0-nightly (15433e8cc 2018-08-02)
cargo-web 0.6.14
stdweb 0.4.8

cargo +nightly web build -p frontend --target wasm32-unknown-unknown --release --verbose

Running `rustc --crate-name stdweb /home/deedasmi/.cargo/registry/src/github.com-1ecc6299db9ec823/stdweb-0.4.8/src/lib.rs --color always --error-format json --crate-type lib --emit=dep-info,link -C opt-level=3 --cfg 'feature="default"' --cfg 'feature="serde"' --cfg 'feature="serde_json"' -C metadata=c3b755290590b12c -C extra-filename=-c3b755290590b12c --out-dir /home/deedasmi/rust_game_server/target/wasm32-unknown-unknown/release/deps --target wasm32-unknown-unknown -L dependency=/home/deedasmi/rust_game_server/target/wasm32-unknown-unknown/release/deps -L dependency=/home/deedasmi/rust_game_server/target/release/deps --extern discard=/home/deedasmi/rust_game_server/target/wasm32-unknown-unknown/release/deps/libdiscard-f41d7cf49758fa12.rlib --extern serde=/home/deedasmi/rust_game_server/target/wasm32-unknown-unknown/release/deps/libserde-05998384e317ede7.rlib --extern serde_json=/home/deedasmi/rust_game_server/target/wasm32-unknown-unknown/release/deps/libserde_json-dbb8443067c54392.rlib --extern stdweb_derive=/home/deedasmi/rust_game_server/target/release/deps/libstdweb_derive-56fdba5ed79a1091.so --extern stdweb_internal_macros=/home/deedasmi/rust_game_server/target/release/deps/libstdweb_internal_macros-254c9a45a2a50f67.so --cap-lints allow`
error: Could not compile `stdweb`.

Caused by:
  process didn't exit successfully: `rustc --crate-name stdweb /home/deedasmi/.cargo/registry/src/github.com-1ecc6299db9ec823/stdweb-0.4.8/src/lib.rs --color always --error-format json --crate-type lib --emit=dep-info,link -C opt-level=3 --cfg 'feature="default"' --cfg 'feature="serde"' --cfg 'feature="serde_json"' -C metadata=c3b755290590b12c -C extra-filename=-c3b755290590b12c --out-dir /home/deedasmi/rust_game_server/target/wasm32-unknown-unknown/release/deps --target wasm32-unknown-unknown -L dependency=/home/deedasmi/rust_game_server/target/wasm32-unknown-unknown/release/deps -L dependency=/home/deedasmi/rust_game_server/target/release/deps --extern discard=/home/deedasmi/rust_game_server/target/wasm32-unknown-unknown/release/deps/libdiscard-f41d7cf49758fa12.rlib --extern serde=/home/deedasmi/rust_game_server/target/wasm32-unknown-unknown/release/deps/libserde-05998384e317ede7.rlib --extern serde_json=/home/deedasmi/rust_game_server/target/wasm32-unknown-unknown/release/deps/libserde_json-dbb8443067c54392.rlib --extern stdweb_derive=/home/deedasmi/rust_game_server/target/release/deps/libstdweb_derive-56fdba5ed79a1091.so --extern stdweb_internal_macros=/home/deedasmi/rust_game_server/target/release/deps/libstdweb_internal_macros-254c9a45a2a50f67.so --cap-lints allow` (signal: 11, SIGSEGV: invalid memory reference)
error: build failed

rust_game_server|master⚡ ⇒ coredumpctl gdb
           PID: 25296 (rustc)
           UID: 1000 (deedasmi)
           GID: 985 (users)
        Signal: 11 (SEGV)
     Timestamp: Sun 2018-08-05 01:12:26 CDT (8min ago)
  Command Line: /home/deedasmi/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/bin/rustc --crate-name stdweb /home/deedasmi/.cargo/registry/src/github.com-1ecc6299db9ec823/stdweb-0.4.8/src/lib.rs --color always --error-format json --crate-type lib --emit=dep-info,link -C opt-level=3 --cfg feature="default" --cfg feature="serde" --cfg feature="serde_json" -C metadata=c3b755290590b12c -C extra-filename=-c3b755290590b12c --out-dir /home/deedasmi/rust_game_server/target/wasm32-unknown-unknown/release/deps --target wasm32-unknown-unknown -L dependency=/home/deedasmi/rust_game_server/target/wasm32-unknown-unknown/release/deps -L dependency=/home/deedasmi/rust_game_server/target/release/deps --extern discard=/home/deedasmi/rust_game_server/target/wasm32-unknown-unknown/release/deps/libdiscard-f41d7cf49758fa12.rlib --extern serde=/home/deedasmi/rust_game_server/target/wasm32-unknown-unknown/release/deps/libserde-05998384e317ede7.rlib --extern serde_json=/home/deedasmi/rust_game_server/target/wasm32-unknown-unknown/release/deps/libserde_json-dbb8443067c54392.rlib --extern stdweb_derive=/home/deedasmi/rust_game_server/target/release/deps/libstdweb_derive-56fdba5ed79a1091.so --extern stdweb_internal_macros=/home/deedasmi/rust_game_server/target/release/deps/libstdweb_internal_macros-254c9a45a2a50f67.so --cap-lints allow
    Executable: /home/deedasmi/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/bin/rustc
 Control Group: /user.slice/user-1000.slice/session-c2.scope
          Unit: session-c2.scope
         Slice: user-1000.slice
       Session: c2
     Owner UID: 1000 (deedasmi)
       Boot ID: a72bdd8af7e8491ca087be0226ab5d68
    Machine ID: 07cf691655e3459b9e4648ae9b6b5a11
      Hostname: lappy
       Storage: /var/lib/systemd/coredump/core.rustc.1000.a72bdd8af7e8491ca087be0226ab5d68.25296.1533449546000000.lz4
       Message: Process 25296 (rustc) of user 1000 dumped core.
                
                Stack trace of thread 25339:
                #0  0x00007f58c0f787b6 n/a (/home/deedasmi/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/codegen-backends/librustc_codegen_llvm-llvm.so)

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Reading symbols from /home/deedasmi/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/bin/rustc...(no debugging symbols found)...done.
[New LWP 25339]
[New LWP 25334]
[New LWP 25338]
[New LWP 25296]
[New LWP 25337]
[New LWP 25340]
[New LWP 25335]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/usr/lib/libthread_db.so.1".
Core was generated by `/home/deedasmi/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/bin/rustc --'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  0x00007f58c0f787b6 in llvm::scc_iterator<llvm::CallGraph*, llvm::GraphTraits<llvm::CallGraph*> >::DFSVisitOne(llvm::CallGraphNode*) ()
   from /home/deedasmi/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/codegen-backends/librustc_codegen_llvm-llvm.so
[Current thread is 1 (Thread 0x7f58a77ff700 (LWP 25339))]
(gdb) bt
#0  0x00007f58c0f787b6 in llvm::scc_iterator<llvm::CallGraph*, llvm::GraphTraits<llvm::CallGraph*> >::DFSVisitOne(llvm::CallGraphNode*) ()
   from /home/deedasmi/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/codegen-backends/librustc_codegen_llvm-llvm.so
#1  0x00007f58c1c4dfa1 in (anonymous namespace)::CGPassManager::runOnModule(llvm::Module&) ()
   from /home/deedasmi/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/codegen-backends/librustc_codegen_llvm-llvm.so
#2  0x00007f58c1f6b01e in llvm::legacy::PassManagerImpl::run(llvm::Module&) ()
   from /home/deedasmi/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/codegen-backends/librustc_codegen_llvm-llvm.so
#3  0x00007f58c1eed026 in LLVMRunPassManager ()
   from /home/deedasmi/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/codegen-backends/librustc_codegen_llvm-llvm.so
#4  0x00007f58c072c34b in rustc_codegen_llvm::back::write::execute_work_item ()
   from /home/deedasmi/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/codegen-backends/librustc_codegen_llvm-llvm.so
#5  0x00007f58c06ef82e in std::sys_common::backtrace::__rust_begin_short_backtrace ()
   from /home/deedasmi/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/codegen-backends/librustc_codegen_llvm-llvm.so
#6  0x00007f58c06f1228 in std::panicking::try::do_call ()
   from /home/deedasmi/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/codegen-backends/librustc_codegen_llvm-llvm.so
#7  0x00007f58caca476a in __rust_maybe_catch_panic () at libpanic_unwind/lib.rs:105
#8  0x00007f58c06f8e21 in <F as alloc::boxed::FnBox<A>>::call_box ()
   from /home/deedasmi/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/codegen-backends/librustc_codegen_llvm-llvm.so
#9  0x00007f58cac6a05b in _$LT$alloc..boxed..Box$LT$$LP$dyn$u20$alloc..boxed..FnBox$LT$A$C$$u20$Output$u3d$R$GT$$u20$$u2b$$u20$$u27$a$RP$$GT$$u20$as$u20$core..ops..function..FnOnce$LT$A$GT$$GT$::call_once::h7ba473a7a0770ee0 () at /checkout/src/liballoc/boxed.rs:652
#10 std::sys_common::thread::start_thread () at libstd/sys_common/thread.rs:24
#11 0x00007f58cac66326 in std::sys::unix::thread::Thread::new::thread_start () at libstd/sys/unix/thread.rs:90
#12 0x00007f58c4eb8075 in start_thread () from /usr/lib/libpthread.so.0
#13 0x00007f58ca94953f in clone () from /usr/lib/libc.so.6
(gdb)
@kennytm kennytm added A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. O-wasm Target: WASM (WebAssembly), http://webassembly.org/ I-crash Issue: The compiler crashes (SIGSEGV, SIGABRT, etc). Use I-ICE instead when the compiler panics. C-bug Category: This is a bug. labels Aug 5, 2018
@alexcrichton
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Quite a few changes have happened to the wasm backend in the meantime since this was opened, so I'm going to close this as "likely fixed"

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A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. C-bug Category: This is a bug. I-crash Issue: The compiler crashes (SIGSEGV, SIGABRT, etc). Use I-ICE instead when the compiler panics. O-wasm Target: WASM (WebAssembly), http://webassembly.org/
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@alexcrichton @kennytm @Deedasmi