Wasmtime GitHub notifications bot (Nov 02 2023 at 16:25): Wasmtime GitHub notifications bot (Nov 02 2023 at 16:25):narpfel added the cranelift label to Issue #7454.
Wasmtime GitHub notifications bot (Nov 02 2023 at 16:25):narpfel added the bug label to Issue #7454.
Wasmtime GitHub notifications bot (Nov 02 2023 at 16:25):narpfel opened issue #7454:
I tried
rustc_codegen_cranelifton some of my projects, and found that even though the binaries appeared to run normally, they produced errors and segfaults invalgrind. Looking at the disassembly, it appeared that valgrind doesn’t like the way Cranelift performs stack probing.
.clifTest CaseThis is the most minimal Rust code that I came up with:
fn main() { let _xs: [u32; 5_000]; }which generates the following
.cliffile:<details>
<summary>
output file
main.clif/_ZN4main4main17hf30ba8656d3abcbbE.unopt.clif</summary>
generated by
rustc -Z codegen-backend=cranelift src/main.rs --emit=llvm-irset opt_level=none set tls_model=elf_gd set libcall_call_conv=isa_default set probestack_size_log2=12 set probestack_strategy=inline set bb_padding_log2_minus_one=0 set regalloc_checker=0 set regalloc_verbose_logs=0 set enable_alias_analysis=1 set enable_verifier=0 set is_pic=1 set use_colocated_libcalls=0 set enable_float=1 set enable_nan_canonicalization=0 set enable_pinned_reg=0 set enable_atomics=1 set enable_safepoints=0 set enable_llvm_abi_extensions=1 set unwind_info=1 set preserve_frame_pointers=0 set machine_code_cfg_info=0 set enable_probestack=1 set probestack_func_adjusts_sp=0 set enable_jump_tables=1 set enable_heap_access_spectre_mitigation=1 set enable_table_access_spectre_mitigation=1 set enable_incremental_compilation_cache_checks=0 target x86_64 has_sse3=1 has_ssse3=1 has_sse41=1 has_sse42=1 has_avx=0 has_avx2=0 has_fma=0 has_avx512bitalg=0 has_avx512dq=0 has_avx512vl=0 has_avx512vbmi=0 has_avx512f=0 has_popcnt=1 has_bmi1=0 has_bmi2=0 has_lzcnt=0 function u0:8() system_v { ; symbol _ZN4main4main17hf30ba8656d3abcbbE ; instance Instance { def: Item(DefId(0:3 ~ main[b61b]::main)), args: [] } ; abi FnAbi { args: [], ret: ArgAbi { layout: TyAndLayout { ty: (), layout: Layout { size: Size(0 bytes), align: AbiAndPrefAlign { abi: Align(1 bytes), pref: Align(8 bytes) }, abi: Aggregate { sized: true }, fields: Arbitrary { offsets: [], memory_index: [] }, largest_niche: None, variants: Single { index: 0 }, max_repr_align: None, unadjusted_abi_align: Align(1 bytes) } }, mode: Ignore }, c_variadic: false, fixed_count: 0, conv: Rust, can_unwind: true } ; kind loc.idx param pass mode ty ; zst _0 () 0b 1, 8 align=8,offset= ; ret _0 - Ignore () ; kind local ty size align (abi,pref) ; stack _1 [u32; 5000_usize] 20000b 4, 4 storage=ss0 ss0 = explicit_slot 20000 block0: nop jump block1 block1: nop ; ; return return }</details>
Steps to Reproduce
$ rustc -Z codegen-backend=cranelift src/main.rs $ valgrind ./mainExpected Results
When run in valgrind, this program should not produce any errors.
Actual Results
valgrind complains about out-of-bounds stack writes and then lets the program segfault on a write to an unmapped address:
<details>
<summary>valgrind output</summary>$ RUSTFLAGS="-Z codegen-backend=cranelift" cargo build Compiling project v0.1.0 (/tmp/project) Finished dev [unoptimized + debuginfo] target(s) in 0.23s $ ./target/debug/project $ echo $? 0 $ valgrind ./target/debug/project ==9258== Memcheck, a memory error detector ==9258== Copyright (C) 2002-2022, and GNU GPL'd, by Julian Seward et al. ==9258== Using Valgrind-3.21.0 and LibVEX; rerun with -h for copyright info ==9258== Command: ./target/debug/project ==9258== ==9258== Invalid write of size 4 ==9258== at 0x10F5FF: project::main (main.rs:1) ==9258== by 0x10F68F: core::ops::function::FnOnce::call_once (function.rs:250) ==9258== by 0x10F673: std::sys_common::backtrace::__rust_begin_short_backtrace (backtrace.rs:154) ==9258== by 0x10F720: std::rt::lang_start::{{closure}} (rt.rs:167) ==9258== by 0x1260A6: call_once<(), (dyn core::ops::function::Fn<(), Output=i32> + core::marker::Sync + core::panic::unwind_safe::RefUnwindSafe)> (function.rs:284) ==9258== by 0x1260A6: do_call<&(dyn core::ops::function::Fn<(), Output=i32> + core::marker::Sync + core::panic::unwind_safe::RefUnwindSafe), i32> (panicking.rs:552) ==9258== by 0x1260A6: try<i32, &(dyn core::ops::function::Fn<(), Output=i32> + core::marker::Sync + core::panic::unwind_safe::RefUnwindSafe)> (panicking.rs:516) ==9258== by 0x1260A6: catch_unwind<&(dyn core::ops::function::Fn<(), Output=i32> + core::marker::Sync + core::panic::unwind_safe::RefUnwindSafe), i32> (panic.rs:142) ==9258== by 0x1260A6: {closure#2} (rt.rs:148) ==9258== by 0x1260A6: do_call<std::rt::lang_start_internal::{closure_env#2}, isize> (panicking.rs:552) ==9258== by 0x1260A6: try<isize, std::rt::lang_start_internal::{closure_env#2}> (panicking.rs:516) ==9258== by 0x1260A6: catch_unwind<std::rt::lang_start_internal::{closure_env#2}, isize> (panic.rs:142) ==9258== by 0x1260A6: std::rt::lang_start_internal (rt.rs:148) ==9258== by 0x10F6F5: std::rt::lang_start (rt.rs:166) ==9258== by 0x10F5F5: main (in /tmp/project/target/debug/project) ==9258== Address 0x1ffeffe5d0 is on thread 1's stack ==9258== 4096 bytes below stack pointer ==9258== ==9258== Invalid write of size 4 ==9258== at 0x10F606: project::main (main.rs:1) ==9258== by 0x10F68F: core::ops::function::FnOnce::call_once (function.rs:250) ==9258== by 0x10F673: std::sys_common::backtrace::__rust_begin_short_backtrace (backtrace.rs:154) ==9258== by 0x10F720: std::rt::lang_start::{{closure}} (rt.rs:167) ==9258== by 0x1260A6: call_once<(), (dyn core::ops::function::Fn<(), Output=i32> + core::marker::Sync + core::panic::unwind_safe::RefUnwindSafe)> (function.rs:284) ==9258== by 0x1260A6: do_call<&(dyn core::ops::function::Fn<(), Output=i32> + core::marker::Sync + core::panic::unwind_safe::RefUnwindSafe), i32> (panicking.rs:552) ==9258== by 0x1260A6: try<i32, &(dyn core::ops::function::Fn<(), Output=i32> + core::marker::Sync + core::panic::unwind_safe::RefUnwindSafe)> (panicking.rs:516) ==9258== by 0x1260A6: catch_unwind<&(dyn core::ops::function::Fn<(), Output=i32> + core::marker::Sync + core::panic::unwind_safe::RefUnwindSafe), i32> (panic.rs:142) ==9258== by 0x1260A6: {closure#2} (rt.rs:148) ==9258== by 0x1260A6: do_call<std::rt::lang_start_internal::{closure_env#2}, isize> (panicking.rs:552) ==9258== by 0x1260A6: try<isize, std::rt::lang_start_internal::{closure_env#2}> (panicking.rs:516) ==9258== by 0x1260A6: catch_unwind<std::rt::lang_start_internal::{closure_env#2}, isize> (panic.rs:142) ==9258== by 0x1260A6: std::rt::lang_start_internal (rt.rs:148) ==9258== by 0x10F6F5: std::rt::lang_start (rt.rs:166) ==9258== by 0x10F5F5: main (in /tmp/project/target/debug/project) ==9258== Address 0x1ffeffd5d0 is on thread 1's stack ==9258== 8192 bytes below stack pointer ==9258== ==9258== Invalid write of size 4 ==9258== at 0x10F60D: project::main (main.rs:1) ==9258== by 0x10F68F: core::ops::function::FnOnce::call_once (function.rs:250) ==9258== by 0x10F673: std::sys_common::backtrace::__rust_begin_short_backtrace (backtrace.rs:154) ==9258== by 0x10F720: std::rt::lang_start::{{closure}} (rt.rs:167) ==9258== by 0x1260A6: call_once<(), (dyn core::ops::function::Fn<(), Output=i32> + core::marker::Sync + core::panic::unwind_safe::RefUnwindSafe)> (function.rs:284) ==9258== by 0x1260A6: do_call<&(dyn core::ops::function::Fn<(), Output=i32> + core::marker::Sync + core::panic::unwind_safe::RefUnwindSafe), i32> (panicking.rs:552) ==9258== by 0x1260A6: try<i32, &(dyn core::ops::function::Fn<(), Output=i32> + core::marker::Sync + core::panic::unwind_safe::RefUnwindSafe)> (panicking.rs:516) ==9258== by 0x1260A6: catch_unwind<&(dyn core::ops::function::Fn<(), Output=i32> + core::marker::Sync + core::panic::unwind_safe::RefUnwindSafe), i32> (panic.rs:142) ==9258== by 0x1260A6: {closure#2} (rt.rs:148) ==9258== by 0x1260A6: do_call<std::rt::lang_start_internal::{closure_env#2}, isize> (panicking.rs:552) ==9258== by 0x1260A6: try<isize, std::rt::lang_start_internal::{closure_env#2}> (panicking.rs:516) ==9258== by 0x1260A6: catch_unwind<std::rt::lang_start_internal::{closure_env#2}, isize> (panic.rs:142) ==9258== by 0x1260A6: std::rt::lang_start_internal (rt.rs:148) ==9258== by 0x10F6F5: std::rt::lang_start (rt.rs:166) ==9258== by 0x10F5F5: main (in /tmp/project/target/debug/project) ==9258== Address 0x1ffeffc5d0 is not stack'd, malloc'd or (recently) free'd ==9258== ==9258== ==9258== Process terminating with default action of signal 11 (SIGSEGV): dumping core ==9258== Access not within mapped region at address 0x1FFEFFC5D0 ==9258== at 0x10F60D: project::main (main.rs:1) ==9258== by 0x10F68F: core::ops::function::FnOnce::call_once (function.rs:250) ==9258== by 0x10F673: std::sys_common::backtrace::__rust_begin_short_backtrace (backtrace.rs:154) ==9258== by 0x10F720: std::rt::lang_start::{{closure}} (rt.rs:167) ==9258== by 0x1260A6: call_once<(), (dyn core::ops::function::Fn<(), Output=i32> + core::marker::Sync + core::panic::unwind_safe::RefUnwindSafe)> (function.rs:284) ==9258== by 0x1260A6: do_call<&(dyn core::ops::function::Fn<(), Output=i32> + core::marker::Sync + core::panic::unwind_safe::RefUnwindSafe), i32> (panicking.rs:552) ==9258== by 0x1260A6: try<i32, &(dyn core::ops::function::Fn<(), Output=i32> + core::marker::Sync + core::panic::unwind_safe::RefUnwindSafe)> (panicking.rs:516) ==9258== by 0x1260A6: catch_unwind<&(dyn core::ops::function::Fn<(), Output=i32> + core::marker::Sync + core::panic::unwind_safe::RefUnwindSafe), i32> (pani [message truncated]
Wasmtime GitHub notifications bot (Nov 02 2023 at 16:41):cfallin commented on issue #7454:
cc @bjorn3
I suspect the sequence may be technically in violation of the redzone constraints of the ABI and we may need to move
rspdownward in steps... if we moverspdownward all at once, before the probes, we risk putting it in other valid (unrelated) memory and then an async interruption (signal handler or whatnot) clobbers things. So perhaps the spec-compliant sequence issub rsp, 0x1000 mov dword [rsp], rsp sub rsp, 0x1000 mov dword [rsp], rsp ... sub rsp, 0xe20 mov dword [rsp], rspwhich is the literal unroll of the probe-loop. What do you think @bjorn3 / @afonso360 ?
Wasmtime GitHub notifications bot (Nov 02 2023 at 16:45):narpfel commented on issue #7454:
we may need to move
rspdownward in steps...This is basically how LLVM does it:
00000000000075e0 <_ZN7project4main17ha1977755d345ddbbE>: 75e0: 48 81 ec 00 10 00 00 sub rsp,0x1000 75e7: 48 c7 04 24 00 00 00 mov QWORD PTR [rsp],0x0 75ee: 00 75ef: 48 81 ec 00 10 00 00 sub rsp,0x1000 75f6: 48 c7 04 24 00 00 00 mov QWORD PTR [rsp],0x0 75fd: 00 75fe: 48 81 ec 00 10 00 00 sub rsp,0x1000 7605: 48 c7 04 24 00 00 00 mov QWORD PTR [rsp],0x0 760c: 00 760d: 48 81 ec 00 10 00 00 sub rsp,0x1000 7614: 48 c7 04 24 00 00 00 mov QWORD PTR [rsp],0x0 761b: 00 761c: 48 81 ec a0 0d 00 00 sub rsp,0xda0 7623: 48 81 c4 a0 4d 00 00 add rsp,0x4da0 762a: c3 ret 762b: 0f 1f 44 00 00 nop DWORD PTR [rax+rax*1+0x0]
Wasmtime GitHub notifications bot (Nov 02 2023 at 17:08):afonso360 commented on issue #7454:
which is the literal unroll of the probe-loop. What do you think @bjorn3 / @afonso360 ?
Yeah, I think this makes sense. I also checked what clang generates for AArch64 / RISC-V, and it does the same thing, so we might also have to update those backends.
Wasmtime GitHub notifications bot (Nov 02 2023 at 17:25):bjorn3 commented on issue #7454:
I suspect the sequence may be technically in violation of the redzone constraints of the ABI and we may need to move rsp downward in steps
The current instruction sequence should be fine with respect to the redzone constraints, right? When the mov runs there is no signal handler running, so no clobbering of the signal handler stack. And the signal handler clobbering the written data is fine as don't never read it again without a write in between.
Wasmtime GitHub notifications bot (Nov 02 2023 at 18:22):cfallin commented on issue #7454:
In practice things should play out as you say, yes (so there isn't a "real" correctness bug or possibility of corruption here, AFAICT). But the ABI doc explicitly defines the redzone and Valgrind here is interpreting the stores as ordinary stack-frame stores (that would presumably contain data we want to preserve), I guess. The spec doesn't explicitly say anywhere that code must not write below
rsp - 128, as far as I have found, but I guess it could be inferred from the description of stack frame locations together with a conservative "any store to the stack is to a stack frame" interpretation. IMHO it's best to be a bit conservative here and LLVM apparently thought the same...
Wasmtime GitHub notifications bot (Nov 02 2023 at 19:23):narpfel commented on issue #7454:
LLVM’s stack probing was apparently implemented in D68720, derived from the implementation in GCC (as per this article), and the discussion there links to the GCC mailing list, which has some insights why that specific strategy was chosen:
https://gcc.gnu.org/pipermail/gcc-patches/2017-June/477152.html:
Most ports first probe by pages for whatever space is requested, then
after all probing is done, they actually allocate space. This runs
afoul of valgrind in various unpleasant ways (including crashing
valgrind on two targets).Only x86-linux currently uses a "moving sp" allocation and probing
strategy. ie, it actually allocates space, then probes the space.--
After much poking around I concluded that we really need to implement
allocation and probing via a "moving sp" strategy. Probing into
unallocated areas runs afoul of valgrind, so that's a non-starter.So both LLVM and GCC explicitly cite “we want to please valgrind” as a reason for their implementation strategy.
Wasmtime GitHub notifications bot (Nov 03 2023 at 20:59):afonso360 closed issue #7454:
I tried
rustc_codegen_cranelifton some of my projects, and found that even though the binaries appeared to run normally, they produced errors and segfaults invalgrind. Looking at the disassembly, it appeared that valgrind doesn’t like the way Cranelift performs stack probing.
.clifTest CaseThis is the most minimal Rust code that I came up with:
fn main() { let _xs: [u32; 5_000]; }which generates the following
.cliffile:<details>
<summary>
output file
main.clif/_ZN4main4main17hf30ba8656d3abcbbE.unopt.clif</summary>
generated by
rustc -Z codegen-backend=cranelift src/main.rs --emit=llvm-irset opt_level=none set tls_model=elf_gd set libcall_call_conv=isa_default set probestack_size_log2=12 set probestack_strategy=inline set bb_padding_log2_minus_one=0 set regalloc_checker=0 set regalloc_verbose_logs=0 set enable_alias_analysis=1 set enable_verifier=0 set is_pic=1 set use_colocated_libcalls=0 set enable_float=1 set enable_nan_canonicalization=0 set enable_pinned_reg=0 set enable_atomics=1 set enable_safepoints=0 set enable_llvm_abi_extensions=1 set unwind_info=1 set preserve_frame_pointers=0 set machine_code_cfg_info=0 set enable_probestack=1 set probestack_func_adjusts_sp=0 set enable_jump_tables=1 set enable_heap_access_spectre_mitigation=1 set enable_table_access_spectre_mitigation=1 set enable_incremental_compilation_cache_checks=0 target x86_64 has_sse3=1 has_ssse3=1 has_sse41=1 has_sse42=1 has_avx=0 has_avx2=0 has_fma=0 has_avx512bitalg=0 has_avx512dq=0 has_avx512vl=0 has_avx512vbmi=0 has_avx512f=0 has_popcnt=1 has_bmi1=0 has_bmi2=0 has_lzcnt=0 function u0:8() system_v { ; symbol _ZN4main4main17hf30ba8656d3abcbbE ; instance Instance { def: Item(DefId(0:3 ~ main[b61b]::main)), args: [] } ; abi FnAbi { args: [], ret: ArgAbi { layout: TyAndLayout { ty: (), layout: Layout { size: Size(0 bytes), align: AbiAndPrefAlign { abi: Align(1 bytes), pref: Align(8 bytes) }, abi: Aggregate { sized: true }, fields: Arbitrary { offsets: [], memory_index: [] }, largest_niche: None, variants: Single { index: 0 }, max_repr_align: None, unadjusted_abi_align: Align(1 bytes) } }, mode: Ignore }, c_variadic: false, fixed_count: 0, conv: Rust, can_unwind: true } ; kind loc.idx param pass mode ty ; zst _0 () 0b 1, 8 align=8,offset= ; ret _0 - Ignore () ; kind local ty size align (abi,pref) ; stack _1 [u32; 5000_usize] 20000b 4, 4 storage=ss0 ss0 = explicit_slot 20000 block0: nop jump block1 block1: nop ; ; return return }</details>
Steps to Reproduce
$ rustc -Z codegen-backend=cranelift src/main.rs $ valgrind ./mainExpected Results
When run in valgrind, this program should not produce any errors.
Actual Results
valgrind complains about out-of-bounds stack writes and then lets the program segfault on a write to an unmapped address:
<details>
<summary>valgrind output</summary>$ RUSTFLAGS="-Z codegen-backend=cranelift" cargo build Compiling project v0.1.0 (/tmp/project) Finished dev [unoptimized + debuginfo] target(s) in 0.23s $ ./target/debug/project $ echo $? 0 $ valgrind ./target/debug/project ==9258== Memcheck, a memory error detector ==9258== Copyright (C) 2002-2022, and GNU GPL'd, by Julian Seward et al. ==9258== Using Valgrind-3.21.0 and LibVEX; rerun with -h for copyright info ==9258== Command: ./target/debug/project ==9258== ==9258== Invalid write of size 4 ==9258== at 0x10F5FF: project::main (main.rs:1) ==9258== by 0x10F68F: core::ops::function::FnOnce::call_once (function.rs:250) ==9258== by 0x10F673: std::sys_common::backtrace::__rust_begin_short_backtrace (backtrace.rs:154) ==9258== by 0x10F720: std::rt::lang_start::{{closure}} (rt.rs:167) ==9258== by 0x1260A6: call_once<(), (dyn core::ops::function::Fn<(), Output=i32> + core::marker::Sync + core::panic::unwind_safe::RefUnwindSafe)> (function.rs:284) ==9258== by 0x1260A6: do_call<&(dyn core::ops::function::Fn<(), Output=i32> + core::marker::Sync + core::panic::unwind_safe::RefUnwindSafe), i32> (panicking.rs:552) ==9258== by 0x1260A6: try<i32, &(dyn core::ops::function::Fn<(), Output=i32> + core::marker::Sync + core::panic::unwind_safe::RefUnwindSafe)> (panicking.rs:516) ==9258== by 0x1260A6: catch_unwind<&(dyn core::ops::function::Fn<(), Output=i32> + core::marker::Sync + core::panic::unwind_safe::RefUnwindSafe), i32> (panic.rs:142) ==9258== by 0x1260A6: {closure#2} (rt.rs:148) ==9258== by 0x1260A6: do_call<std::rt::lang_start_internal::{closure_env#2}, isize> (panicking.rs:552) ==9258== by 0x1260A6: try<isize, std::rt::lang_start_internal::{closure_env#2}> (panicking.rs:516) ==9258== by 0x1260A6: catch_unwind<std::rt::lang_start_internal::{closure_env#2}, isize> (panic.rs:142) ==9258== by 0x1260A6: std::rt::lang_start_internal (rt.rs:148) ==9258== by 0x10F6F5: std::rt::lang_start (rt.rs:166) ==9258== by 0x10F5F5: main (in /tmp/project/target/debug/project) ==9258== Address 0x1ffeffe5d0 is on thread 1's stack ==9258== 4096 bytes below stack pointer ==9258== ==9258== Invalid write of size 4 ==9258== at 0x10F606: project::main (main.rs:1) ==9258== by 0x10F68F: core::ops::function::FnOnce::call_once (function.rs:250) ==9258== by 0x10F673: std::sys_common::backtrace::__rust_begin_short_backtrace (backtrace.rs:154) ==9258== by 0x10F720: std::rt::lang_start::{{closure}} (rt.rs:167) ==9258== by 0x1260A6: call_once<(), (dyn core::ops::function::Fn<(), Output=i32> + core::marker::Sync + core::panic::unwind_safe::RefUnwindSafe)> (function.rs:284) ==9258== by 0x1260A6: do_call<&(dyn core::ops::function::Fn<(), Output=i32> + core::marker::Sync + core::panic::unwind_safe::RefUnwindSafe), i32> (panicking.rs:552) ==9258== by 0x1260A6: try<i32, &(dyn core::ops::function::Fn<(), Output=i32> + core::marker::Sync + core::panic::unwind_safe::RefUnwindSafe)> (panicking.rs:516) ==9258== by 0x1260A6: catch_unwind<&(dyn core::ops::function::Fn<(), Output=i32> + core::marker::Sync + core::panic::unwind_safe::RefUnwindSafe), i32> (panic.rs:142) ==9258== by 0x1260A6: {closure#2} (rt.rs:148) ==9258== by 0x1260A6: do_call<std::rt::lang_start_internal::{closure_env#2}, isize> (panicking.rs:552) ==9258== by 0x1260A6: try<isize, std::rt::lang_start_internal::{closure_env#2}> (panicking.rs:516) ==9258== by 0x1260A6: catch_unwind<std::rt::lang_start_internal::{closure_env#2}, isize> (panic.rs:142) ==9258== by 0x1260A6: std::rt::lang_start_internal (rt.rs:148) ==9258== by 0x10F6F5: std::rt::lang_start (rt.rs:166) ==9258== by 0x10F5F5: main (in /tmp/project/target/debug/project) ==9258== Address 0x1ffeffd5d0 is on thread 1's stack ==9258== 8192 bytes below stack pointer ==9258== ==9258== Invalid write of size 4 ==9258== at 0x10F60D: project::main (main.rs:1) ==9258== by 0x10F68F: core::ops::function::FnOnce::call_once (function.rs:250) ==9258== by 0x10F673: std::sys_common::backtrace::__rust_begin_short_backtrace (backtrace.rs:154) ==9258== by 0x10F720: std::rt::lang_start::{{closure}} (rt.rs:167) ==9258== by 0x1260A6: call_once<(), (dyn core::ops::function::Fn<(), Output=i32> + core::marker::Sync + core::panic::unwind_safe::RefUnwindSafe)> (function.rs:284) ==9258== by 0x1260A6: do_call<&(dyn core::ops::function::Fn<(), Output=i32> + core::marker::Sync + core::panic::unwind_safe::RefUnwindSafe), i32> (panicking.rs:552) ==9258== by 0x1260A6: try<i32, &(dyn core::ops::function::Fn<(), Output=i32> + core::marker::Sync + core::panic::unwind_safe::RefUnwindSafe)> (panicking.rs:516) ==9258== by 0x1260A6: catch_unwind<&(dyn core::ops::function::Fn<(), Output=i32> + core::marker::Sync + core::panic::unwind_safe::RefUnwindSafe), i32> (panic.rs:142) ==9258== by 0x1260A6: {closure#2} (rt.rs:148) ==9258== by 0x1260A6: do_call<std::rt::lang_start_internal::{closure_env#2}, isize> (panicking.rs:552) ==9258== by 0x1260A6: try<isize, std::rt::lang_start_internal::{closure_env#2}> (panicking.rs:516) ==9258== by 0x1260A6: catch_unwind<std::rt::lang_start_internal::{closure_env#2}, isize> (panic.rs:142) ==9258== by 0x1260A6: std::rt::lang_start_internal (rt.rs:148) ==9258== by 0x10F6F5: std::rt::lang_start (rt.rs:166) ==9258== by 0x10F5F5: main (in /tmp/project/target/debug/project) ==9258== Address 0x1ffeffc5d0 is not stack'd, malloc'd or (recently) free'd ==9258== ==9258== ==9258== Process terminating with default action of signal 11 (SIGSEGV): dumping core ==9258== Access not within mapped region at address 0x1FFEFFC5D0 ==9258== at 0x10F60D: project::main (main.rs:1) ==9258== by 0x10F68F: core::ops::function::FnOnce::call_once (function.rs:250) ==9258== by 0x10F673: std::sys_common::backtrace::__rust_begin_short_backtrace (backtrace.rs:154) ==9258== by 0x10F720: std::rt::lang_start::{{closure}} (rt.rs:167) ==9258== by 0x1260A6: call_once<(), (dyn core::ops::function::Fn<(), Output=i32> + core::marker::Sync + core::panic::unwind_safe::RefUnwindSafe)> (function.rs:284) ==9258== by 0x1260A6: do_call<&(dyn core::ops::function::Fn<(), Output=i32> + core::marker::Sync + core::panic::unwind_safe::RefUnwindSafe), i32> (panicking.rs:552) ==9258== by 0x1260A6: try<i32, &(dyn core::ops::function::Fn<(), Output=i32> + core::marker::Sync + core::panic::unwind_safe::RefUnwindSafe)> (panicking.rs:516) ==9258== by 0x1260A6: catch_unwind<&(dyn core::ops::function::Fn<(), Output=i32> + core::marker::Sync + core::panic::unwind_safe::RefUnwindSafe), i32> (pa [message truncated]
Last updated: Dec 23 2024 at 12:05 UTC