Dumped core

[NathanGallet]

I'm trying to run netcoredbg from Neovim. I build the project successfully but when running the debugger, at some point, the program crash. In journalctl I can see :

                                          Process 235511 (netcoredbg) of user 1000 dumped core.

                                                 Stack trace of thread 235677:
                                                 #0  0x000078bc1e8335e7 n/a (n/a + 0x0)
                                                 #1  0x000078bc1e8334eb n/a (n/a + 0x0)
                                                 #2  0x00005958e6cc920b n/a (n/a + 0x0)
                                                 #3  0x00005958e6cc65e9 n/a (n/a + 0x0)
                                                 #4  0x00005958e6cbe4d4 n/a (n/a + 0x0)
                                                 #5  0x00005958e6c630b2 n/a (n/a + 0x0)
                                                 #6  0x000078bc1d623a73 n/a (n/a + 0x0)
                                                 #7  0x000078bc1d60bc2a n/a (n/a + 0x0)
                                                 #8  0x000078bc1d616518 n/a (n/a + 0x0)
                                                 #9  0x000078bc1d616e07 n/a (n/a + 0x0)
                                                 #10 0x000078bc1d616ea9 n/a (n/a + 0x0)
                                                 #11 0x000078bc1d4261be n/a (n/a + 0x0)
                                                 #12 0x000078bc1e8a370a n/a (n/a + 0x0)
                                                 #13 0x000078bc1e927aac n/a (n/a + 0x0)
                                                 ELF object binary architecture: AMD x86-64

So, I tried to run the project from CLI dotnet bin/Debug/net8.0/MyProject.dll which seems to work properly. But using the same command with netcoredbg I got netcoredbg --interpreter=cli -- dotnet bin/Debug/net8.0/MyProject.dll that return :

library loaded: /home/user/Dev/Project/src/MyProject/bin/Debug/net8.0/Model.dll
no symbols loaded, base address: 0x784dd2ef0000, size: 122368(0x1de00)

[there is a lot of those] 

netcoredbg: /usr/src/debug/netcoredbg/netcoredbg-3.1.2-1054/src/metadata/modules_sources.h:68: bool netcoredbg::method_data_t::NestedInto(const method_data_t &) const: Assertion `startLine != other.startLine || startColumn != other.startColumn' failed.
[1]    244005 IOT instruction (core dumped)  netcoredbg --interpreter=cli -- dotnet

And from GDB I can see :

(gdb) bt full
#0  __GI_abort () at abort.c:91
        act = {__sigaction_handler = {sa_handler = 0x0, sa_sigaction = 0x0}, sa_mask = {__val = {18446744073709551615, 0 <repeats 15 times>}}, sa_flags = 0, sa_restorer = 0x0}
#1  0x00007aac684334eb in __assert_fail_base (fmt=<optimized out>, assertion=<optimized out>, file=<optimized out>, line=68, function=<optimized out>) at assert.c:118
        str = 0x7aac50080270 "\240\244\324\372\253z"
        total = <optimized out>
#2  0x000063ee45a1020b in netcoredbg::method_data_t::NestedInto (this=<optimized out>, other=...) at /usr/src/debug/netcoredbg/netcoredbg-3.1.2-1054/src/metadata/modules_sources.h:68
No locals.

I'm running out of idea to debug with this problem. Do you have any idea on what's wrong?

Thank you.

[gbalykov]

I build the project successfully

Please share which OS, arch, compiler, etc. you use, and your build commands

[NathanGallet]

I'm running 6.13.6-arch1-1 x86_64 GNU/Linux. I'm building my project by doing cd /home/user/Dev/Project/src/MyProject, -> dotnet build .

[viewizard]

Assertion `startLine != other.startLine || startColumn != other.startColumn'

Not really sure why you use debug version of netcoredbg with enabled assertion and debug related blocks, but... This assertion's fail mean that some c# nested function have same start position as parrent method start position in source, that shoud not happen for sure (at least in our current logic). Could you please provide minimal c# code that could reproduce this issue for investigation?

[gbalykov]

I'm building my project by doing cd /home/user/Dev/Project/src/MyProject, -> dotnet build .

Did you build netcoredbg yourself or used binaries from releases?

[NathanGallet]

I took the one from AUR repo : NET Core debugger 3.1.2-1 (801069d, None). @viewizard I'm trying to setup a repo to reproduce

[gbalykov]

Config in https://aur.archlinux.org/packages/netcoredbg seems incorrect, for example this is not right:

 -DCMAKE_BUILD_TYPE=None

[gbalykov]

You can find linux build instructions at https://github.com/Samsung/netcoredbg?tab=readme-ov-file#unix, more info on build type at https://github.com/Samsung/netcoredbg?tab=readme-ov-file#selecting-between-debug-and-release-builds. Or you can also try AUR config with -DCMAKE_BUILD_TYPE=Release. Otherwise debug build (default) will be slower than release one. Anyway, please share a repro, we'll take a look.