Unable to execute build.sh in Ubuntu due to "Error: Method 'String.Format' not found." Exception

[monis256]

What You Are Seeing?

C# build error on the 0.23.0 version of cake nuget package

What is Expected?

The build.sh & build.cake script should run without error

What version of Cake are you using?

0.23.0

Are you running on a 32 or 64 bit system?

64 bit. A WSL on Windows 10

What environment are you running on? Windows? Linux? Mac?

Linux --> Distributor ID: Ubuntu Description: Ubuntu 16.04.2 LTS Release: 16.04 Codename: xenial

Are you running on a CI Server? If so, which one?

No

How Did You Get This To Happen? (Steps to Reproduce)

1. Download curl -Lsfo build.sh https://cakebuild.net/download/bootstrapper/linux and give execution permissions to build.sh
2. Have a Hello World .cake script
3. execute ./build.sh

Output Log

Downloading NuGet...
Feeds used:
  /home/ubuntu/.nuget/packages/
  https://api.nuget.org/v3/index.json

Restoring NuGet package Cake.0.23.0.
Adding package 'Cake.0.23.0' to folder '/mnt/d/Documents/CodeRepo/tools'
Added package 'Cake.0.23.0' to folder '/mnt/d/Documents/CodeRepo/tools'
Error: Method 'String.Format' not found.
Unhandled Exception:
System.MissingMethodException: Method 'Array.Empty' not found.
  at Cake.Core.Diagnostics.CakeBuildLog.Write (Verbosity verbosity, LogLevel level, System.String format, System.Object[] args) <0x7ff9b180 + 0x002fb> in <filename unknown>:0
  at Cake.Core.Diagnostics.LogExtensions.Error (ICakeLog log, Verbosity verbosity, System.String format, System.Object[] args) <0x7ff9b130 + 0x00042> in <filename unknown>:0
  at Cake.Core.Diagnostics.LogExtensions.Error (ICakeLog log, System.String format, System.Object[] args) <0x7ff9b0f0 + 0x00023> in <filename unknown>:0
  at Cake.Program.LogException[T] (ICakeLog log, Cake.T ex) <0x7ff9adf0 + 0x0014f> in <filename unknown>:0
  at Cake.Program.Main () <0x7ffc0d60 + 0x004a3> in <filename unknown>:0
[ERROR] FATAL UNHANDLED EXCEPTION: System.MissingMethodException: Method 'Array.Empty' not found.
  at Cake.Core.Diagnostics.CakeBuildLog.Write (Verbosity verbosity, LogLevel level, System.String format, System.Object[] args) <0x7ff9b180 + 0x002fb> in <filename unknown>:0
  at Cake.Core.Diagnostics.LogExtensions.Error (ICakeLog log, Verbosity verbosity, System.String format, System.Object[] args) <0x7ff9b130 + 0x00042> in <filename unknown>:0
  at Cake.Core.Diagnostics.LogExtensions.Error (ICakeLog log, System.String format, System.Object[] args) <0x7ff9b0f0 + 0x00023> in <filename unknown>:0
  at Cake.Program.LogException[T] (ICakeLog log, Cake.T ex) <0x7ff9adf0 + 0x0014f> in <filename unknown>:```

[devlead]

Which version of mono are you using? Cake requires Mono 4.4.2 or later.

[monis256]

Running on Mono 4.4.3

[Cheesebaron]

Where did you get this version from? According to packages.ubuntu.org the mono-complete package is version 4.2.1.

Any chance you can try something newer than a more than a year old version of mono?

[devlead]

Xamarin provides packages newer than what the distributions officially provide. I would assume 4.4.3 should work as it's newer than 4.4.2 which is what we build Cake with on Linux. Wonder if this is a WSL issue, you could try a newer version of mono, which you can download here:
http://www.mono-project.com/download/#download-lin-ubuntu

[Cheesebaron]

I've seen this Array.Empty thing before when developing for Xamarin.Android and Xamarin.iOS. This is because .NET 4.5 does not contain Array.Empty<T> while .NET 4.6 does. Could look like mono 4.4.3 might have a regression, since this should be there since 4.2.0 (c6).

[monis256]

Downloading the latest version of mono (5.4.1.6) seems to have solved the problem.

[devlead]

@monis256 so am I right to assume this isn't an issue with Cake but mono?

[monis256]

@devlead yes this issue was with old version of Mono. I guess Cake needed the latest