log.txt

$ sudo apt-get -o Debug::pkgProblemResolver=true  -f install aspnetcore-runtime-2.1                                         
Reading package lists... Done                                                                                                                               
Building dependency tree                                                                                                                                    
Reading state information... Done                                                                                                                           
Starting pkgProblemResolver with broken count: 2                                                                                                            
Starting 2 pkgProblemResolver with broken count: 2                                                                                                          
Investigating (0) dotnet-host:amd64 < none -> 2.1.0-rc1-1 @un uN Ib >                                                                                       
Broken dotnet-host:amd64 Depends on dotnet-runtime-deps-2.1.0-rc1:amd64 < none | 2.1.0-rc1-1 @un uH > (>= 2.1.0-rc1)                                        
  Considering dotnet-runtime-deps-2.1.0-rc1:amd64 0 as a solution to dotnet-host:amd64 4                                                                    
  Holding Back dotnet-host:amd64 rather than change dotnet-runtime-deps-2.1.0-rc1:amd64                                                                     
Investigating (0) dotnet-hostfxr-2.1:amd64 < none -> 2.1.0-1 @un uN Ib >                                                                                    
Broken dotnet-hostfxr-2.1:amd64 Depends on dotnet-host:amd64 < none | 2.1.0-rc1-1 @un uH > (>= 2.1.0)                                                       
  Considering dotnet-host:amd64 4 as a solution to dotnet-hostfxr-2.1:amd64 4                                                                               
  Holding Back dotnet-hostfxr-2.1:amd64 rather than change dotnet-host:amd64                                                                                
Investigating (0) dotnet-runtime-2.1:amd64 < none -> 2.1.0-1 @un uN Ib >                                                                                    
Broken dotnet-runtime-2.1:amd64 Depends on dotnet-runtime-deps-2.1:amd64 < none | 2.1.0-1 @un uH > (>= 2.1.0)                                               
  Considering dotnet-runtime-deps-2.1:amd64 0 as a solution to dotnet-runtime-2.1:amd64 3                                                                   
  Holding Back dotnet-runtime-2.1:amd64 rather than change dotnet-runtime-deps-2.1:amd64                                                                    
Investigating (1) aspnetcore-runtime-2.1:amd64 < none -> 2.1.0-1 @un puN Ib >                                                                               
Broken aspnetcore-runtime-2.1:amd64 Depends on dotnet-runtime-2.1:amd64 < none | 2.1.0-1 @un uH > (>= 2.1.0)                                                
  Considering dotnet-runtime-2.1:amd64 3 as a solution to aspnetcore-runtime-2.1:amd64 10001                                                                
  Re-Instated liburcu6:amd64                                                                                                                                
  Re-Instated liblttng-ust-ctl2:amd64                                                                                                                       
  Re-Instated liblttng-ust0:amd64                                                                                                                           
    Reinst Failed early because of libicu60:amd64                                                                                                           
    Reinst Failed because of dotnet-runtime-deps-2.1:amd64                                                                                                  
Done                                                                                                                                                        
Some packages could not be installed. This may mean that you have                                                                                           
requested an impossible situation or if you are using the unstable                                                                                          
distribution that some required packages have not yet been created                                                                                          
or been moved out of Incoming.                                                                                                                              
The following information may help to resolve the situation:                                                                                                
                                                                                                                                                            
The following packages have unmet dependencies:                                                                                                             
 aspnetcore-runtime-2.1 : Depends: dotnet-runtime-2.1 (>= 2.1.0) but it is not going to be installed                                                        
E: Unable to correct problems, you have held broken packages.