Can't build on Ubuntu 18.04

[akshita31]

dotnet --info:

.NET Command Line Tools (2.1.200)

Product Information:
 Version:            2.1.200
 Commit SHA-1 hash:  2edba8d7f1

Runtime Environment:
 OS Name:     ubuntu
 OS Version:  18.04
 OS Platform: Linux
 RID:         ubuntu.18.04-x64
 Base Path:   /usr/share/dotnet/sdk/2.1.200/

Microsoft .NET Core Shared Framework Host

  Version  : 2.0.7
  Build    : 2d61d0b043915bc948ebf98836fefe9ba942be11

mono --version :

Mono JIT compiler version 5.12.0.226 (tarball Thu May  3 09:42:09 UTC 2018)
Copyright (C) 2002-2014 Novell, Inc, Xamarin Inc and Contributors. www.mono-project.com
	TLS:           __thread
	SIGSEGV:       altstack
	Notifications: epoll
	Architecture:  amd64
	Disabled:      none
	Misc:          softdebug 
	Interpreter:   yes
	LLVM:          supported, not enabled.
	GC:            sgen (concurrent by default)

I am using the latest master (Last commit - e850717) . I followed the steps as listed to build omnisharp-roslyn and on running ./build.sh, I get the error:

=================================================================
Got a SIGSEGV while executing native code. This usually indicates
a fatal error in the mono runtime or one of the native libraries 
used by your application.
=================================================================

Error: One or more errors occurred.
	GitVersion: Process returned an error (exit code 134).

Please help.

[DustinCampbell]

I just created a VM and can reproduce the problem. It looks like this is due to GitTools/GitVersion#1408. There are various solutions we could employ to workaround the problem, but I think we should probably just wait until GitVersion is fixed.

[hifall]

"There are various solutions we could employ to workaround the problem" -- could you please provide one or some of them? This would get me past this issue. Thanks.

[alecStewart1]

@DustinCampbell could you provide @hifall and I some possible workarounds? I've updated to the most recent master branch and it seems that this issue with GitVersion has yet to be fixed because I'm getting the same error.

[DustinCampbell]

I have not investigated deeply enough to find any workarounds. @david-driscoll, do you have any ideas? It feels like GitVersion is dropping the ball on Linux.

[rchande]

Obviously this doesn't solve the underlying problem, but if you disable the GitVersion task (https://github.com/OmniSharp/omnisharp-roslyn/blob/master/build.cake#L103), are you able to build? (cc @nickspoons )

[nickspoons]

Thanks @rchande,

I tried removing that line but it doesn't help - on my archlinux machine the build fails before build.cake is even loaded, while "Compiling build script..." (according the the verbose output).

(Note I'm using archlinux in WSL, which I realise is not exactly a clean test environment, but I get very similar logs in a proper archlinux VM)

Here's what I get:

Click to show output of ./build.sh

  $ ./build.sh --target Cleanup --verbosity Verbose

Feeds used:
  /home/nickspoon/.nuget/packages/
  https://api.nuget.org/v3/index.json
  https://dotnet.myget.org/F/dotnet-core/api/v3/index.json

All packages listed in /mnt/c/code/external/omnisharp-roslyn.linux/tools/packages.config are already installed.
Analyzing build script...
Processing build script...
Installing tools...
Installing addins...
Compiling build script...
/proc/self/maps:
7ff50000-80000000 rwxp 00000000 00:00 0
7f4d48000000-7f4d48021000 rw-p 00000000 00:00 0
7f4d48021000-7f4d4c000000 ---p 00000000 00:00 0
7f4d4c000000-7f4d4c021000 rw-p 00000000 00:00 0
7f4d4c021000-7f4d50000000 ---p 00000000 00:00 0
7f4d50000000-7f4d50021000 rw-p 00000000 00:00 0
7f4d50021000-7f4d54000000 ---p 00000000 00:00 0
7f4d54000000-7f4d54021000 rw-p 00000000 00:00 0
7f4d54021000-7f4d58000000 ---p 00000000 00:00 0
7f4d58000000-7f4d58036000 rw-p 00000000 00:00 0
7f4d58036000-7f4d5c000000 ---p 00000000 00:00 0
7f4d5c000000-7f4d5c021000 rw-p 00000000 00:00 0
7f4d5c021000-7f4d60000000 ---p 00000000 00:00 0
7f4d60000000-7f4d60021000 rw-p 00000000 00:00 0
7f4d60021000-7f4d64000000 ---p 00000000 00:00 0
7f4d64000000-7f4d64029000 rw-p 00000000 00:00 0
7f4d64029000-7f4d68000000 ---p 00000000 00:00 0
7f4d68000000-7f4d68021000 rw-p 00000000 00:00 0
7f4d68021000-7f4d6c000000 ---p 00000000 00:00 0
7f4d6c3a0000-7f4d6c3a1000 ---p 00000000 00:00 0
7f4d6c3a1000-7f4d6c5a1000 rw-p 00000000 00:00 0
7f4d6c5b0000-7f4d6c5b1000 ---p 00000000 00:00 0
7f4d6c5b1000-7f4d6c7b1000 rw-p 00000000 00:00 0
7f4d6c7c0000-7f4d6c835000 r--p 00000000 00:00 360375             /usr/lib/libcrypto.so.1.1
7f4d6c835000-7f4d6c9d4000 r-xp 00075000 00:00 360375             /usr/lib/libcrypto.so.1.1
7f4d6c9d4000-7f4d6ca61000 r--p 00214000 00:00 360375             /usr/lib/libcrypto.so.1.1
7f4d6ca61000-7f4d6ca8f000 rw-p 002a0000 00:00 360375             /usr/lib/libcrypto.so.1.1
7f4d6ca8f000-7f4d6ca92000 rw-p 00000000 00:00 0
7f4d6caa0000-7f4d6cabd000 r--p 00000000 00:00 360377             /usr/lib/libssl.so.1.1
7f4d6cabd000-7f4d6cb09000 r-xp 0001d000 00:00 360377             /usr/lib/libssl.so.1.1
7f4d6cb09000-7f4d6cb22000 r--p 00069000 00:00 360377             /usr/lib/libssl.so.1.1
7f4d6cb22000-7f4d6cb23000 ---p 0001d065 00:00 360377             /usr/lib/libssl.so.1.1
7f4d6cb23000-7f4d6cb30000 rw-p 00082000 00:00 360377             /usr/lib/libssl.so.1.1
7f4d6cb80000-7f4d6cb81000 ---p 00000000 00:00 0
7f4d6cb81000-7f4d6cd81000 rw-p 00000000 00:00 0
7f4d6cda0000-7f4d6cda1000 ---p 00000000 00:00 0
7f4d6cda1000-7f4d6cfa1000 rw-p 00000000 00:00 0
7f4d6cfc0000-7f4d6cfc1000 ---p 00000000 00:00 0
7f4d6cfc1000-7f4d6d1c1000 rw-p 00000000 00:00 0
7f4d6d1d0000-7f4d6d1d1000 ---p 00000000 00:00 0
7f4d6d1d1000-7f4d6d3d1000 rw-p 00000000 00:00 0
7f4d6d3e0000-7f4d6d3e1000 ---p 00000000 00:00 0
7f4d6d3e1000-7f4d6d5e1000 rw-p 00000000 00:00 0
7f4d6d5f0000-7f4d6d5f1000 ---p 00000000 00:00 0
7f4d6d5f1000-7f4d6d5f2000 rw-p 00000000 00:00 0
7f4d6d5f2000-7f4d6d5fa000 ---p 00000000 00:00 0
7f4d6d5fa000-7f4d6d7f1000 rw-p 00000000 00:00 0
7f4d6d800000-7f4d6d901000 rw-p 00000000 00:00 0
7f4d6d930000-7f4d6d940000 rwxp 00000000 00:00 0
7f4d6d940000-7f4d6d941000 rw-p 00000000 00:00 0
7f4d6d948000-7f4d6d9b1000 r--p 00000000 00:00 677370             /mnt/c/code/external/omnisharp-roslyn.linux/tools/gitversion.commandline.4.0.0-beta0012/GitVersion.CommandLine/tools/LibGit2Sharp.dll
7f4d6d9b1000-7f4d6da00000 r--p 00000000 00:00 438827             /usr/lib/mono/gac/Microsoft.CSharp/4.0.0.0__b03f5f7f11d50a3a/Microsoft.CSharp.dll
7f4d6da00000-7f4d6da04000 rw-p 00000000 00:00 0
7f4d6da04000-7f4d6dcc7000 r--p 00000000 00:00 439076             /usr/lib/mono/gac/System/4.0.0.0__b77a5c561934e089/System.dll
7f4d6dcc7000-7f4d6ddc0000 r--p 00000000 00:00 438904             /usr/lib/mono/gac/System.Core/4.0.0.0__b77a5c561934e089/System.Core.dll
7f4d6ddc0000-7f4d6ddc1000 ---p 00000000 00:00 0
7f4d6ddc1000-7f4d6ddc2000 rw-p 00000000 00:00 0
7f4d6ddc2000-7f4d6ddca000 ---p 00000000 00:00 0
7f4d6ddca000-7f4d6dfc1000 rw-p 00000000 00:00 0
7f4d6dfd0000-7f4d6e003000 rw-p 00000000 00:00 0
7f4d6e010000-7f4d6e091000 rw-p 00000000 00:00 0
7f4d6e0a0000-7f4d6e0a1000 r--p 00000000 00:00 435257             /usr/lib/mono/4.5/mscorlib.dll.so
7f4d6e0a1000-7f4d6e4ee000 r-xp 00001000 00:00 435257             /usr/lib/mono/4.5/mscorlib.dll.so
7f4d6e4ee000-7f4d6e7ec000 r--p 0044e000 00:00 435257             /usr/lib/mono/4.5/mscorlib.dll.so
7f4d6e7ec000-7f4d6e7ed000 r--p 0074b000 00:00 435257             /usr/lib/mono/4.5/mscorlib.dll.so
7f4d6e7ed000-7f4d6e7ee000 rw-p 0074c000 00:00 435257             /usr/lib/mono/4.5/mscorlib.dll.so
7f4d6e7ee000-7f4d6e815000 rw-p 00000000 00:00 0
7f4d6e81e000-7f4d6ebf0000 r--p 00000000 00:00 435256             /usr/lib/mono/4.5/mscorlib.dll
7f4d6ebf0000-7f4d6fbf0000 rw-p 00000000 00:00 0
7f4d6fbf0000-7f4d6fbf1000 ---p 00000000 00:00 0
7f4d6fbf1000-7f4d703f1000 rw-p 00000000 00:00 0
7f4d70400000-7f4d70801000 rw-p 00000000 00:00 0
7f4d70810000-7f4d70814000 rw-p 00000000 00:00 0
7f4d70820000-7f4d70824000 rw-p 00000000 00:00 0
7f4d70830000-7f4d70831000 rw-p 00000000 00:00 0
7f4d70840000-7f4d70873000 rw-p 00000000 00:00 0
7f4d70879000-7f4d708e0000 r--p 00000000 00:00 677327             /mnt/c/code/external/omnisharp-roslyn.linux/tools/gitversion.commandline.4.0.0-beta0012/GitVersion.CommandLine/tools/GitVersion.exe
7f4d708e0000-7f4d708e1000 rw-p 00000000 00:00 0
7f4d708f0000-7f4d708f4000 rw-p 00000000 00:00 0
7f4d70900000-7f4d70901000 rw-p 00000000 00:00 0
7f4d70910000-7f4d70911000 rw-p 00000000 00:00 0
7f4d70920000-7f4d70921000 rw-p 00000000 00:00 0
7f4d70921000-7f4d70980000 ---p 00000000 00:00 0
7f4d70980000-7f4d70981000 rw-p 00000000 00:00 0
7f4d7098c000-7f4d70c70000 r--p 00000000 00:00 665600             /usr/lib/locale/locale-archive
7f4d70c70000-7f4d70c73000 rw-p 00000000 00:00 0
7f4d70c80000-7f4d70c82000 rw-p 00000000 00:00 0
7f4d70c90000-7f4d70c91000 rw-p 00000000 00:00 0
7f4d70c91000-7f4d70cb3000 r--p 00000000 00:00 357584             /usr/lib/libc-2.28.so
7f4d70cb3000-7f4d70dfe000 r-xp 00022000 00:00 357584             /usr/lib/libc-2.28.so
7f4d70dfe000-7f4d70e4a000 r--p 0016d000 00:00 357584             /usr/lib/libc-2.28.so
7f4d70e4a000-7f4d70e4b000 ---p 00022197 00:00 357584             /usr/lib/libc-2.28.so
7f4d70e4b000-7f4d70e4f000 r--p 001b9000 00:00 357584             /usr/lib/libc-2.28.so
7f4d70e4f000-7f4d70e51000 rw-p 001bd000 00:00 357584             /usr/lib/libc-2.28.so
7f4d70e51000-7f4d70e55000 rw-p 00000000 00:00 0
7f4d70e55000-7f4d70e58000 r--p 00000000 00:00 192881             /usr/lib/libgcc_s.so.1
7f4d70e58000-7f4d70e69000 r-xp 00003000 00:00 192881             /usr/lib/libgcc_s.so.1
7f4d70e69000-7f4d70e6c000 r--p 00014000 00:00 192881             /usr/lib/libgcc_s.so.1
7f4d70e6c000-7f4d70e6d000 ---p 00003014 00:00 192881             /usr/lib/libgcc_s.so.1
7f4d70e6d000-7f4d70e6e000 r--p 00017000 00:00 192881             /usr/lib/libgcc_s.so.1
7f4d70e6e000-7f4d70e6f000 rw-p 00018000 00:00 192881             /usr/lib/libgcc_s.so.1
7f4d70e6f000-7f4d70e75000 r--p 00000000 00:00 357637             /usr/lib/libpthread-2.28.so
7f4d70e75000-7f4d70e84000 r-xp 00006000 00:00 357637             /usr/lib/libpthread-2.28.so
7f4d70e84000-7f4d70e8a000 r--p 00015000 00:00 357637             /usr/lib/libpthread-2.28.so
7f4d70e8a000-7f4d70e8b000 r--p 0001a000 00:00 357637             /usr/lib/libpthread-2.28.so
7f4d70e8b000-7f4d70e8c000 rw-p 0001b000 00:00 357637             /usr/lib/libpthread-2.28.so
7f4d70e8c000-7f4d70e90000 rw-p 00000000 00:00 0
7f4d70e90000-7f4d70e91000 r--p 00000000 00:00 357596             /usr/lib/libdl-2.28.so
7f4d70e91000-7f4d70e92000 r-xp 00001000 00:00 357596             /usr/lib/libdl-2.28.so
7f4d70e92000-7f4d70e93000 r--p 00002000 00:00 357596             /usr/lib/libdl-2.28.so
7f4d70e93000-7f4d70e94000 r--p 00002000 00:00 357596             /usr/lib/libdl-2.28.so
7f4d70e94000-7f4d70e95000 rw-p 00003000 00:00 357596             /usr/lib/libdl-2.28.so
7f4d70ea0000-7f4d70ea2000 r--p 00000000 00:00 357650             /usr/lib/librt-2.28.so
7f4d70ea2000-7f4d70ea6000 r-xp 00002000 00:00 357650             /usr/lib/librt-2.28.so
7f4d70ea6000-7f4d70ea8000 r--p 00006000 00:00 357650             /usr/lib/librt-2.28.so
7f4d70ea8000-7f4d70ea9000 r--p 00007000 00:00 357650             /usr/lib/librt-2.28.so
7f4d70ea9000-7f4d70eaa000 rw-p 00008000 00:00 357650             /usr/lib/librt-2.28.so
7f4d70eb0000-7f4d70ebd000 r--p 00000000 00:00 357603             /usr/lib/libm-2.28.so
7f4d70ebd000-7f4d70f5e000 r-xp 0000d000 00:00 357603             /usr/lib/libm-2.28.so
7f4d70f5e000-7f4d71033000 r--p 000ae000 00:00 357603             /usr/lib/libm-2.28.so
7f4d71033000-7f4d71034000 r--p 00182000 00:00 357603             /usr/lib/libm-2.28.so
7f4d71034000-7f4d71035000 rw-p 00183000 00:00 357603             /usr/lib/libm-2.28.so
7f4d71040000-7f4d71041000 rw-p 00000000 00:00 0
7f4d71050000-7f4d71051000 rw-p 00000000 00:00 0
7f4d71060000-7f4d71061000 r--p 00000000 00:00 357572             /usr/lib/ld-2.28.so
7f4d71061000-7f4d71062000 r--p 00001000 00:00 357572             /usr/lib/ld-2.28.so
7f4d71062000-7f4d71080000 r-xp 00002000 00:00 357572             /usr/lib/ld-2.28.so
7f4d71080000-7f4d71081000 r-xp 00020000 00:00 357572             /usr/lib/ld-2.28.so
7f4d71081000-7f4d71088000 r--p 00021000 00:00 357572             /usr/lib/ld-2.28.so
7f4d71088000-7f4d71089000 r--p 00028000 00:00 357572             /usr/lib/ld-2.28.so
7f4d71089000-7f4d7108a000 r--p 00028000 00:00 357572             /usr/lib/ld-2.28.so
7f4d7108a000-7f4d7108b000 rw-p 00029000 00:00 357572             /usr/lib/ld-2.28.so
7f4d7108b000-7f4d7108c000 rw-p 00000000 00:00 0
7f4d71090000-7f4d71092000 rw-p 00000000 00:00 0
7f4d71097000-7f4d71098000 rw-s 00000000 00:00 603624             /run/shm/mono.21880
7f4d71098000-7f4d710c1000 r--p 00000000 00:00 428305             /usr/bin/mono-sgen
7f4d710c1000-7f4d710c2000 r--p 00029000 00:00 428305             /usr/bin/mono-sgen
7f4d710c2000-7f4d713ac000 r-xp 0002a000 00:00 428305             /usr/bin/mono-sgen
7f4d713ac000-7f4d713ad000 r-xp 00314000 00:00 428305             /usr/bin/mono-sgen
7f4d713ad000-7f4d714cd000 r--p 00315000 00:00 428305             /usr/bin/mono-sgen
7f4d714cd000-7f4d714ce000 r--p 00435000 00:00 428305             /usr/bin/mono-sgen
7f4d714ce000-7f4d714d6000 r--p 00435000 00:00 428305             /usr/bin/mono-sgen
7f4d714d6000-7f4d714da000 rw-p 0043d000 00:00 428305             /usr/bin/mono-sgen
7f4d714da000-7f4d714f0000 rw-p 00000000 00:00 0
7fffd6c58000-7fffd7265000 rw-p 00000000 00:00 0                  [heap]
7fffde981000-7fffde982000 rw-p 00000000 00:00 0                  [stack]
7fffde982000-7fffde98a000 ---p 00000000 00:00 0
7fffde98a000-7fffdf181000 rw-p 00000000 00:00 0
7fffdf809000-7fffdf80a000 r-xp 00000000 00:00 0                  [vdso]

Native stacktrace:

	/usr/bin/mono-sgen(+0xcb17b) [0x7f4d7116317b]
	/usr/bin/mono-sgen(+0x319a0) [0x7f4d710c99a0]
	/usr/lib/libpthread.so.0(+0x123c0) [0x7f4d70e813c0]
	/lib64/ld-linux-x86-64.so.2(+0xd005) [0x7f4d7106d005]
	/lib64/ld-linux-x86-64.so.2(+0x14406) [0x7f4d71074406]
	/usr/lib/libc.so.6(_dl_catch_exception+0x77) [0x7f4d70dc8e77]
	/lib64/ld-linux-x86-64.so.2(+0x13dff) [0x7f4d71073dff]
	/usr/lib/libc.so.6(+0x137371) [0x7f4d70dc8371]
	/usr/lib/libc.so.6(_dl_catch_exception+0x77) [0x7f4d70dc8e77]
	/usr/lib/libc.so.6(_dl_catch_error+0x33) [0x7f4d70dc8f13]
	/usr/lib/libc.so.6(+0x137477) [0x7f4d70dc8477]
	/usr/lib/libc.so.6(__libc_dlopen_mode+0x4a) [0x7f4d70dc851a]
	/usr/lib/libpthread.so.0(+0x129ac) [0x7f4d70e819ac]
	/usr/lib/libpthread.so.0(+0x12bd4) [0x7f4d70e81bd4]
	/usr/lib/libpthread.so.0(__pthread_unwind+0x45) [0x7f4d70e7fcd5]
	/usr/lib/libpthread.so.0(+0x8d19) [0x7f4d70e77d19]
	/usr/bin/mono-sgen(+0x30387a) [0x7f4d7139b87a]
	/usr/bin/mono-sgen(+0x23af6c) [0x7f4d712d2f6c]
	/usr/lib/libpthread.so.0(+0x7a9d) [0x7f4d70e76a9d]
	/usr/lib/libc.so.6(clone+0x43) [0x7f4d70d8ca43]

Debug info from gdb:

(lldb) command source -s 0 '/tmp/mono-gdb-commands.f8ZCHh'
Executing commands in '/tmp/mono-gdb-commands.f8ZCHh'.
(lldb) process attach --pid 21880
error: attach failed: unable to attach

=================================================================
Got a SIGSEGV while executing native code. This usually indicates
a fatal error in the mono runtime or one of the native libraries 
used by your application.
=================================================================

Error: One or more errors occurred.
	GitVersion: Process returned an error (exit code 134).

I've tried adding some debug logging to build.cake but it never gets hit.

[nickspoons]

I managed to get GitVersion working using techniques described here:

1. Install libgit2, which on my system is done with

   sudo pacman -S libgit2
   

2. Edit tools/gitversion.commandline.4.0.0-beta0012/GitVersion.CommandLine/tools/LibGit2Sharp.dll.config to point to the installed libgit2.so

   <configuration>
       <dllmap os="linux" cpu="x86-64" wordsize="64" dll="git2-baa87df" target="/usr/lib/libgit2.so" />
       <dllmap os="osx" cpu="x86,x86-64" dll="git2-baa87df" target="lib/osx/libgit2-baa87df.dylib" />
   </configuration>
   

I suspect that a build on Ubuntu would now have worked, but on Arch there is no Version, so I had to change build.cake#L51 to the following (added the ? to make Version nullable):

        var version = platform.Version?.ToString();

Following that, I can build! I need the --use-global-dotnet-sdk flag, or the .dotnet/dotnet-install.sh script errors out (again because archlinux uses rolling releases and has no version):

./build.sh --target Quick --verbosity Verbose --use-global-dotnet-sdk

Success!

[rchande]

@nickspoons Nice! Thanks for sharing your steps here.