thread 'main' panicked at 'index out of bounds: the len is 4978 but the index is 4978', src/densemap.rs:25:10 #44
Comments
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Wow thanks for the extremely detailed bug report! Also rr is the coolest! I don't have my Linux computer handy at the moment so I can't reproduce, but from the panic and trace: I think this is crashing when generating an error message, and the error message is saying that a given output file is already being built by something else. Looking at your Ninja log there's similarly a warning about possibly the same issue. Maybe there's something in the build files you could diagnose here? (I will endeavor to fix the panic as well, of course) |
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Possibly: one of these files like |
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I tried commenting enough out of CMakeLists.txt to get it to generate something on this Mac, but I could not reproduce this problem. Could you paste your build.ninja file somewhere? |
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This was closed by that PR but I am still interested in the answers to the above questions! |
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Thanks a lot for reviewing so swiftly. I installed the most recent version of n2 and it now gives a similar warning to ninja, however it still fails to build (with a new error this time). I can create a new issue with the new error, if you want install most recent n2 (sadly n2 doesn't have a version cli flag to print this easily)~/Coding/rr $ n2 --version
n2: error: Unrecognized option: 'version'in the rr directory (checked out at the same commit), clean the build dir and tell cmake to generate build.ninja again.rm -rf build && mkdir build && cd build && cmake -G Ninja ../ && cd ..
-- The C compiler identification is GNU 7.5.0
-- The CXX compiler identification is GNU 7.5.0
-- The ASM compiler identification is GNU
-- Found assembler: /usr/bin/cc
-- Check for working C compiler: /usr/bin/cc
-- Check for working C compiler: /usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Performing Test SUPPORTS_CXX14
-- Performing Test SUPPORTS_CXX14 - Success
-- Found PkgConfig: /usr/bin/pkg-config (found version "0.29.1")
-- Checking for module 'capnp'
-- Found capnp, version 0.6.1
-- Checking for module 'zlib'
-- Found zlib, version 1.2.11
-- Found PythonInterp: /usr/bin/python3 (found suitable version "3.6.12", minimum required is "3")
You have called ADD_LIBRARY for library rrpage without any source files. This typically indicates a problem with your CMakeLists.txt file
You have called ADD_LIBRARY for library rrpreload without any source files. This typically indicates a problem with your CMakeLists.txt file
You have called ADD_LIBRARY for library rraudit without any source files. This typically indicates a problem with your CMakeLists.txt file
You have called ADD_LIBRARY for library rrpage_32 without any source files. This typically indicates a problem with your CMakeLists.txt file
You have called ADD_LIBRARY for library rrpreload_32 without any source files. This typically indicates a problem with your CMakeLists.txt file
You have called ADD_LIBRARY for library rraudit_32 without any source files. This typically indicates a problem with your CMakeLists.txt file
-- Configuring done
-- Generating done
-- Build files have been written to: /home/petr_tik/Coding/rr/buildFail to build with n2 but this time with warnings and a new error~/Coding/rr $ RUST_BACKTRACE=full n2 -v -C build/
n2: warn: build.ninja:44074: "../src/preload/preload_interface.h" is repeated in output list
n2: warn: build.ninja:44074: "../src/preload/raw_syscall.S" is repeated in output list
n2: warn: build.ninja:44074: "../src/preload/rrcalls.h" is repeated in output list
thread 'main' panicked at 'expected no file state for ../src/preload/preload_interface.h', src/work.rs:575:17
stack backtrace:
0: 0x561288ee083a - std::backtrace_rs::backtrace::libunwind::trace::h91c465e73bf6c785
at /rustc/9d1b2106e23b1abd32fce1f17267604a5102f57a/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
1: 0x561288ee083a - std::backtrace_rs::backtrace::trace_unsynchronized::hae9da36f5d58b5f3
at /rustc/9d1b2106e23b1abd32fce1f17267604a5102f57a/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
2: 0x561288ee083a - std::sys_common::backtrace::_print_fmt::h7f499fa126a7effb
at /rustc/9d1b2106e23b1abd32fce1f17267604a5102f57a/library/std/src/sys_common/backtrace.rs:67:5
3: 0x561288ee083a - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h3e2b509ce2ce6007
at /rustc/9d1b2106e23b1abd32fce1f17267604a5102f57a/library/std/src/sys_common/backtrace.rs:46:22
4: 0x561288e8101c - core::fmt::write::h753c7571fa063ecb
at /rustc/9d1b2106e23b1abd32fce1f17267604a5102f57a/library/core/src/fmt/mod.rs:1168:17
5: 0x561288eb6eef - std::io::Write::write_fmt::h2815c0519c99ba09
at /rustc/9d1b2106e23b1abd32fce1f17267604a5102f57a/library/std/src/io/mod.rs:1660:15
6: 0x561288ee18d2 - std::sys_common::backtrace::_print::h64941a6fc8b0ed9b
at /rustc/9d1b2106e23b1abd32fce1f17267604a5102f57a/library/std/src/sys_common/backtrace.rs:49:5
7: 0x561288ee18d2 - std::sys_common::backtrace::print::hcf25e43e1a9b0766
at /rustc/9d1b2106e23b1abd32fce1f17267604a5102f57a/library/std/src/sys_common/backtrace.rs:36:9
8: 0x561288ee18d2 - std::panicking::default_hook::{{closure}}::h78d3e6cf97fc623d
at /rustc/9d1b2106e23b1abd32fce1f17267604a5102f57a/library/std/src/panicking.rs:211:50
9: 0x561288ee26be - std::panicking::default_hook::hda898f8d3ad1a5ae
at /rustc/9d1b2106e23b1abd32fce1f17267604a5102f57a/library/std/src/panicking.rs:228:9
10: 0x561288ee26be - std::panicking::rust_panic_with_hook::h1a5ea2d6c23051aa
at /rustc/9d1b2106e23b1abd32fce1f17267604a5102f57a/library/std/src/panicking.rs:606:17
11: 0x561288ee21a8 - std::panicking::begin_panic_handler::{{closure}}::h07f549390938b73f
at /rustc/9d1b2106e23b1abd32fce1f17267604a5102f57a/library/std/src/panicking.rs:502:13
12: 0x561288ee2126 - std::sys_common::backtrace::__rust_end_short_backtrace::h5ec3758a92cfb00d
at /rustc/9d1b2106e23b1abd32fce1f17267604a5102f57a/library/std/src/sys_common/backtrace.rs:139:18
13: 0x561288ee20e2 - rust_begin_unwind
at /rustc/9d1b2106e23b1abd32fce1f17267604a5102f57a/library/std/src/panicking.rs:498:5
14: 0x561288e79380 - core::panicking::panic_fmt::h3a79a6a99affe1d5
at /rustc/9d1b2106e23b1abd32fce1f17267604a5102f57a/library/core/src/panicking.rs:116:14
15: 0x561288e9b606 - n2::work::Work::check_build_files_missing::hf6446c2d294e5e8f
16: 0x561288e9b606 - n2::work::Work::check_build_dirty::he52af68592e746be
at /home/petr_tik/.cargo/git/checkouts/n2-e6f499fa596a8a82/df0a27b/src/work.rs:590:28
17: 0x561288e9b606 - n2::work::Work::run_without_cleanup::h19d1906faad45644
at /home/petr_tik/.cargo/git/checkouts/n2-e6f499fa596a8a82/df0a27b/src/work.rs:671:21
18: 0x561288e953d5 - n2::work::Work::run::h249428d76b2080e1
at /home/petr_tik/.cargo/git/checkouts/n2-e6f499fa596a8a82/df0a27b/src/work.rs:741:22
19: 0x561288e953d5 - n2::run::build::{{closure}}::h2daab0ddc1bd4e0c
at /home/petr_tik/.cargo/git/checkouts/n2-e6f499fa596a8a82/df0a27b/src/run.rs:49:47
20: 0x561288e953d5 - n2::trace::scope::h2bf8a771a111bd3b
at /home/petr_tik/.cargo/git/checkouts/n2-e6f499fa596a8a82/df0a27b/src/trace.rs:116:21
21: 0x561288e953d5 - n2::run::build::h6dc9ded841a12ecc
at /home/petr_tik/.cargo/git/checkouts/n2-e6f499fa596a8a82/df0a27b/src/run.rs:49:19
22: 0x561288e91d71 - n2::run::run_impl::h0bb597f9f5680885
at /home/petr_tik/.cargo/git/checkouts/n2-e6f499fa596a8a82/df0a27b/src/run.rs:209:22
23: 0x561288e7e3d0 - n2::run::run::hd21211266b0e6a0b
at /home/petr_tik/.cargo/git/checkouts/n2-e6f499fa596a8a82/df0a27b/src/run.rs:234:15
24: 0x561288e7e3d0 - n2::main::h4c022cd59e4f0615
at /home/petr_tik/.cargo/git/checkouts/n2-e6f499fa596a8a82/df0a27b/src/main.rs:4:27
25: 0x561288e7e6f3 - core::ops::function::FnOnce::call_once::h25e67c454c9b4a24
at /rustc/9d1b2106e23b1abd32fce1f17267604a5102f57a/library/core/src/ops/function.rs:227:5
26: 0x561288e7e6f3 - std::sys_common::backtrace::__rust_begin_short_backtrace::he1b68df33ad7ec41
at /rustc/9d1b2106e23b1abd32fce1f17267604a5102f57a/library/std/src/sys_common/backtrace.rs:123:18
27: 0x561288e7ead9 - main
28: 0x7f30d8b8cc87 - __libc_start_main
at /build/glibc-uZu3wS/glibc-2.27/csu/../csu/libc-start.c:310
29: 0x561288e7e2da - _start
30: 0x0 - <unknown>Start the build with ninja with same warnings!~/Coding/rr $ ninja -C build/
ninja: Entering directory `build/'
ninja: warning: multiple rules generate ../src/preload/preload_interface.h. builds involving this target will not be correct; continuing anyway [-w dupbuild=warn]
ninja: warning: multiple rules generate ../src/preload/raw_syscall.S. builds involving this target will not be correct; continuing anyway [-w dupbuild=warn]
ninja: warning: multiple rules generate ../src/preload/rrcalls.h. builds involving this target will not be correct; continuing anyway [-w dupbuild=warn]
[1/2405] Linking C executable bin/shared_map_32
[2/2405] Linking C executable bin/strict_priorities_32
[3/2405] Linking C executable bin/segfault_32
ninja: build stopped: interrupted by user. |
Is there anything I can do to minimise this and then open a PR with the failing minimal test case? |
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I think my test case reproduced the problem. I was more curious why CMake generated files like this. |
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Hey, thanks for the awesome project.
A friend/coworker of mine contributed recently and I wanted to try n2 on a decent-sized cpp project -
https://github.com/rr-debugger/rr/
Here is my repro for the bug in the issue title
Install n2 from git
Change to the dir with rr
Cd (or git clone from git clone https://github.com/rr-debugger/rr.git) and follow the build instructions from
https://github.com/rr-debugger/rr/wiki/Building-And-Installing#project-building
Tell cmake to generate build.ninja in the build dir
Check build.ninja and try building with n2
Check the number of lines in the build.ninja file and start a build with n2 until you get an error
rerun n2 and get the full backtrace
Start a build with ninja to smoke test that the build.ninja is valid enough to start building
Hope this helps! Let me know if you need anything else.
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