v3.8.1 + v3.8.2: Fatal: no implicit conversion of StringIO into String

[sanjayankur31]

Using Git head here (5c38b42). Generating the reports works fine, but using tj3d results in this:

Fatal: no implicit conversion of StringIO into String
/usr/share/gems/gems/taskjuggler-3.8.1/lib/taskjuggler/daemon/Daemon.rb:72:in 'IO#reopen'
/usr/share/gems/gems/taskjuggler-3.8.1/lib/taskjuggler/daemon/Daemon.rb:72:in 'TaskJuggler::Daemon#start'
/usr/share/gems/gems/taskjuggler-3.8.1/lib/taskjuggler/daemon/WebServer.rb:62:in 'TaskJuggler::WebServer#start'
/usr/share/gems/gems/taskjuggler-3.8.1/lib/taskjuggler/apps/Tj3WebD.rb:99:in 'TaskJuggler::Tj3WebD#appMain'
/usr/share/gems/gems/taskjuggler-3.8.1/lib/taskjuggler/Tj3AppBase.rb:161:in 'TaskJuggler::Tj3AppBase#main'
/usr/share/gems/gems/taskjuggler-3.8.1/lib/tj3webd.rb:16:in '<top (required)>'
<internal:/usr/share/rubygems/rubygems/core_ext/kernel_require.rb>:136:in 'Kernel#require'
<internal:/usr/share/rubygems/rubygems/core_ext/kernel_require.rb>:136:in 'Kernel#require'
/usr/share/gems/gems/taskjuggler-3.8.1/bin/tj3webd:4:in '<top (required)>'
/usr/sbin/tj3webd:25:in 'Kernel#load'
/usr/sbin/tj3webd:25:in '<main>'

*******************************************************************************
You have triggered a bug in TaskJuggler version 3.8.1!
Please see the user manual on how to get this bug fixed!
http://www.taskjuggler.org/tj3/manual/Reporting_Bugs.html#Reporting_Bugs_and_Feature_Requests
*******************************************************************************
/usr/share/gems/gems/taskjuggler-3.8.1/lib/taskjuggler/MessageHandler.rb:301:in 'TaskJuggler::MessageHandlerInstance#addMessage': RuntimeError (RuntimeError)
        from /usr/share/gems/gems/taskjuggler-3.8.1/lib/taskjuggler/MessageHandler.rb:191:in 'TaskJuggler::MessageHandlerInstance#fatal'
        from /usr/share/gems/gems/taskjuggler-3.8.1/lib/taskjuggler/MessageHandler.rb:312:in 'TaskJuggler::MessageHandler#fatal'
        from /usr/share/gems/gems/taskjuggler-3.8.1/lib/taskjuggler/Tj3AppBase.rb:176:in 'TaskJuggler::Tj3AppBase#main'
        from /usr/share/gems/gems/taskjuggler-3.8.1/lib/tj3webd.rb:16:in '<top (required)>'
        from <internal:/usr/share/rubygems/rubygems/core_ext/kernel_require.rb>:136:in 'Kernel#require'
        from <internal:/usr/share/rubygems/rubygems/core_ext/kernel_require.rb>:136:in 'Kernel#require'
        from /usr/share/gems/gems/taskjuggler-3.8.1/bin/tj3webd:4:in '<top (required)>'
        from /usr/sbin/tj3webd:25:in 'Kernel#load'
        from /usr/sbin/tj3webd:25:in '<main>'
/usr/share/gems/gems/taskjuggler-3.8.1/lib/taskjuggler/daemon/Daemon.rb:72:in 'IO#reopen': no implicit conversion of StringIO into String (TypeError)

      $stdout.reopen(StringIO.new)
                     ^^^^^^^^^^^^
        from /usr/share/gems/gems/taskjuggler-3.8.1/lib/taskjuggler/daemon/Daemon.rb:72:in 'TaskJuggler::Daemon#start'
        from /usr/share/gems/gems/taskjuggler-3.8.1/lib/taskjuggler/daemon/WebServer.rb:62:in 'TaskJuggler::WebServer#start'
        from /usr/share/gems/gems/taskjuggler-3.8.1/lib/taskjuggler/apps/Tj3WebD.rb:99:in 'TaskJuggler::Tj3WebD#appMain'
        from /usr/share/gems/gems/taskjuggler-3.8.1/lib/taskjuggler/Tj3AppBase.rb:161:in 'TaskJuggler::Tj3AppBase#main'
        from /usr/share/gems/gems/taskjuggler-3.8.1/lib/tj3webd.rb:16:in '<top (required)>'
        from <internal:/usr/share/rubygems/rubygems/core_ext/kernel_require.rb>:136:in 'Kernel#require'
        from <internal:/usr/share/rubygems/rubygems/core_ext/kernel_require.rb>:136:in 'Kernel#require'
        from /usr/share/gems/gems/taskjuggler-3.8.1/bin/tj3webd:4:in '<top (required)>'
        from /usr/sbin/tj3webd:25:in 'Kernel#load'
        from /usr/sbin/tj3webd:25:in '<main>'
Fatal: no implicit conversion of StringIO into String
/usr/share/gems/gems/taskjuggler-3.8.1/lib/taskjuggler/daemon/Daemon.rb:72:in 'IO#reopen'
/usr/share/gems/gems/taskjuggler-3.8.1/lib/taskjuggler/daemon/Daemon.rb:72:in 'TaskJuggler::Daemon#start'
/usr/share/gems/gems/taskjuggler-3.8.1/lib/taskjuggler/daemon/ProjectBroker.rb:91:in 'TaskJuggler::ProjectBroker#start'
/usr/share/gems/gems/taskjuggler-3.8.1/lib/taskjuggler/apps/Tj3Daemon.rb:116:in 'TaskJuggler::Tj3Daemon#appMain'
/usr/share/gems/gems/taskjuggler-3.8.1/lib/taskjuggler/Tj3AppBase.rb:161:in 'TaskJuggler::Tj3AppBase#main'
/usr/share/gems/gems/taskjuggler-3.8.1/lib/tj3d.rb:16:in '<top (required)>'
<internal:/usr/share/rubygems/rubygems/core_ext/kernel_require.rb>:136:in 'Kernel#require'
<internal:/usr/share/rubygems/rubygems/core_ext/kernel_require.rb>:136:in 'Kernel#require'
/usr/share/gems/gems/taskjuggler-3.8.1/bin/tj3d:4:in '<top (required)>'
/usr/sbin/tj3d:25:in 'Kernel#load'
/usr/sbin/tj3d:25:in '<main>'

*******************************************************************************
You have triggered a bug in TaskJuggler version 3.8.1!
Please see the user manual on how to get this bug fixed!
http://www.taskjuggler.org/tj3/manual/Reporting_Bugs.html#Reporting_Bugs_and_Feature_Requests
*******************************************************************************

• Platform: Fedora Linux 42
• Ruby:

  $ ruby-mri --version
  ruby 3.4.2 (2025-02-15 revision d2930f8e7a) +PRISM [x86_64-linux]
  

I'll try to strip my project file down to come up with a reproducer and report back.

[scrapper]

Please try version 3.8.2. It should have fixed the issue.

[sanjayankur31]

Hi @scrapper , thanks for the new release. The issue persists, unfortunately:

$ tj3d --webserver --webserver-port 63000  src/projects.tjp
TaskJuggler v3.8.2 - A Project Management Software

Copyright (c) 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020
              by Chris Schlaeger <cs@taskjuggler.org>

This program is free software; you can redistribute it and/or modify it under
the terms of version 2 of the GNU General Public License as published by the
Free Software Foundation.

Fatal: no implicit conversion of StringIO into String
/home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.2/lib/taskjuggler/daemon/Daemon.rb:72:in 'IO#reopen'
/home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.2/lib/taskjuggler/daemon/Daemon.rb:72:in 'TaskJuggler::Daemon#start'
/home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.2/lib/taskjuggler/daemon/WebServer.rb:62:in 'TaskJuggler::WebServer#start'
/home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.2/lib/taskjuggler/apps/Tj3WebD.rb:99:in 'TaskJuggler::Tj3WebD#appMain'
/home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.2/lib/taskjuggler/Tj3AppBase.rb:161:in 'TaskJuggler::Tj3AppBase#main'
/home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.2/lib/tj3webd.rb:16:in '<top (required)>'
<internal:/usr/share/rubygems/rubygems/core_ext/kernel_require.rb>:136:in 'Kernel#require'
<internal:/usr/share/rubygems/rubygems/core_ext/kernel_require.rb>:136:in 'Kernel#require'
/home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.2/bin/tj3webd:4:in '<top (required)>'
/home/asinha/bin/tj3webd:25:in 'Kernel#load'
/home/asinha/bin/tj3webd:25:in '<main>'

*******************************************************************************
You have triggered a bug in TaskJuggler version 3.8.2!
Please see the user manual on how to get this bug fixed!
http://www.taskjuggler.org/tj3/manual/Reporting_Bugs.html#Reporting_Bugs_and_Feature_Requests
*******************************************************************************
/home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.2/lib/taskjuggler/MessageHandler.rb:301:in 'TaskJuggler::MessageHandlerInstance#addMessage': RuntimeError (RuntimeError)
        from /home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.2/lib/taskjuggler/MessageHandler.rb:191:in 'TaskJuggler::MessageHandlerInstance#fatal'
        from /home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.2/lib/taskjuggler/MessageHandler.rb:312:in 'TaskJuggler::MessageHandler#fatal'
        from /home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.2/lib/taskjuggler/Tj3AppBase.rb:176:in 'TaskJuggler::Tj3AppBase#main'
        from /home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.2/lib/tj3webd.rb:16:in '<top (required)>'
        from <internal:/usr/share/rubygems/rubygems/core_ext/kernel_require.rb>:136:in 'Kernel#require'
        from <internal:/usr/share/rubygems/rubygems/core_ext/kernel_require.rb>:136:in 'Kernel#require'
        from /home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.2/bin/tj3webd:4:in '<top (required)>'
        from /home/asinha/bin/tj3webd:25:in 'Kernel#load'
        from /home/asinha/bin/tj3webd:25:in '<main>'
/home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.2/lib/taskjuggler/daemon/Daemon.rb:72:in 'IO#reopen': no implicit conversion of StringIO into String (TypeError)

      $stdout.reopen(StringIO.new)
                     ^^^^^^^^^^^^
        from /home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.2/lib/taskjuggler/daemon/Daemon.rb:72:in 'TaskJuggler::Daemon#start'
        from /home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.2/lib/taskjuggler/daemon/WebServer.rb:62:in 'TaskJuggler::WebServer#start'
        from /home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.2/lib/taskjuggler/apps/Tj3WebD.rb:99:in 'TaskJuggler::Tj3WebD#appMain'
        from /home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.2/lib/taskjuggler/Tj3AppBase.rb:161:in 'TaskJuggler::Tj3AppBase#main'
        from /home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.2/lib/tj3webd.rb:16:in '<top (required)>'
        from <internal:/usr/share/rubygems/rubygems/core_ext/kernel_require.rb>:136:in 'Kernel#require'
        from <internal:/usr/share/rubygems/rubygems/core_ext/kernel_require.rb>:136:in 'Kernel#require'
        from /home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.2/bin/tj3webd:4:in '<top (required)>'
        from /home/asinha/bin/tj3webd:25:in 'Kernel#load'
        from /home/asinha/bin/tj3webd:25:in '<main>'
Fatal: no implicit conversion of StringIO into String
/home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.2/lib/taskjuggler/daemon/Daemon.rb:72:in 'IO#reopen'
/home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.2/lib/taskjuggler/daemon/Daemon.rb:72:in 'TaskJuggler::Daemon#start'
/home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.2/lib/taskjuggler/daemon/ProjectBroker.rb:91:in 'TaskJuggler::ProjectBroker#start'
/home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.2/lib/taskjuggler/apps/Tj3Daemon.rb:116:in 'TaskJuggler::Tj3Daemon#appMain'
/home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.2/lib/taskjuggler/Tj3AppBase.rb:161:in 'TaskJuggler::Tj3AppBase#main'
/home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.2/lib/tj3d.rb:16:in '<top (required)>'
<internal:/usr/share/rubygems/rubygems/core_ext/kernel_require.rb>:136:in 'Kernel#require'
<internal:/usr/share/rubygems/rubygems/core_ext/kernel_require.rb>:136:in 'Kernel#require'
/home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.2/bin/tj3d:4:in '<top (required)>'
/home/asinha/bin/tj3d:25:in 'Kernel#load'
/home/asinha/bin/tj3d:25:in '<main>'

*******************************************************************************
You have triggered a bug in TaskJuggler version 3.8.2!
Please see the user manual on how to get this bug fixed!
http://www.taskjuggler.org/tj3/manual/Reporting_Bugs.html#Reporting_Bugs_and_Feature_Requests
*******************************************************************************

(ins)[asinha@atlas  05_taskjuggler(main *+=)]$ /home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.2/lib/taskjuggler/MessageHandler.rb:301:in 'TaskJuggler::MessageHandlerInstance#addMessage': RuntimeError (RuntimeError)
        from /home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.2/lib/taskjuggler/MessageHandler.rb:191:in 'TaskJuggler::MessageHandlerInstance#fatal'
        from /home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.2/lib/taskjuggler/MessageHandler.rb:312:in 'TaskJuggler::MessageHandler#fatal'
        from /home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.2/lib/taskjuggler/Tj3AppBase.rb:176:in 'TaskJuggler::Tj3AppBase#main'
        from /home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.2/lib/tj3d.rb:16:in '<top (required)>'
        from <internal:/usr/share/rubygems/rubygems/core_ext/kernel_require.rb>:136:in 'Kernel#require'
        from <internal:/usr/share/rubygems/rubygems/core_ext/kernel_require.rb>:136:in 'Kernel#require'
        from /home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.2/bin/tj3d:4:in '<top (required)>'
        from /home/asinha/bin/tj3d:25:in 'Kernel#load'
        from /home/asinha/bin/tj3d:25:in '<main>'
/home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.2/lib/taskjuggler/daemon/Daemon.rb:72:in 'IO#reopen': no implicit conversion of StringIO into String (TypeError)

      $stdout.reopen(StringIO.new)
                     ^^^^^^^^^^^^
        from /home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.2/lib/taskjuggler/daemon/Daemon.rb:72:in 'TaskJuggler::Daemon#start'
        from /home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.2/lib/taskjuggler/daemon/ProjectBroker.rb:91:in 'TaskJuggler::ProjectBroker#start'
        from /home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.2/lib/taskjuggler/apps/Tj3Daemon.rb:116:in 'TaskJuggler::Tj3Daemon#appMain'
        from /home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.2/lib/taskjuggler/Tj3AppBase.rb:161:in 'TaskJuggler::Tj3AppBase#main'
        from /home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.2/lib/tj3d.rb:16:in '<top (required)>'
        from <internal:/usr/share/rubygems/rubygems/core_ext/kernel_require.rb>:136:in 'Kernel#require'
        from <internal:/usr/share/rubygems/rubygems/core_ext/kernel_require.rb>:136:in 'Kernel#require'
        from /home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.2/bin/tj3d:4:in '<top (required)>'
        from /home/asinha/bin/tj3d:25:in 'Kernel#load'
        from /home/asinha/bin/tj3d:25:in '<main>'

$  ruby-mri --version
ruby 3.4.4 (2025-05-14 revision a38531fd3f) +PRISM [x86_64-linux]

[sanjayankur31]

I tried a bisect, and indeed, this commit where stdout was changed from /dev/null to StringIO seems to be causing the issue.

5c38b42#diff-223f5452c93092c915f750da977407cfbef4e1f8eb4873d1e71b92bc7ac73716R72

Reverting the change doesn't seem to help, though. Then I get:

error tj3webd[3221057]: Report server crashed: connection closed

[sanjayankur31]

To reproduce, in the examples/Tutorial/ folder, run: tj3d --debug --webserver --webserver-port 63000 tutorial.tjp.

The output:

tj3d --debug --webserver --webserver-port 63000  tutorial.tjp
TaskJuggler v3.8.4 - A Project Management Software

Copyright (c) 2006 - 2025
              by Chris Schlaeger <cs@taskjuggler.org>

This program is free software; you can redistribute it and/or modify it under
the terms of version 2 of the GNU General Public License as published by the
Free Software Foundation.

Fatal: no implicit conversion of StringIO into String
/home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.4/lib/taskjuggler/daemon/Daemon.rb:72:in 'IO#reopen'
/home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.4/lib/taskjuggler/daemon/Daemon.rb:72:in 'TaskJuggler::Daemon#start'
/home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.4/lib/taskjuggler/daemon/WebServer.rb:62:in 'TaskJuggler::WebServer#start'
/home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.4/lib/taskjuggler/apps/Tj3WebD.rb:99:in 'TaskJuggler::Tj3WebD#appMain'
/home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.4/lib/taskjuggler/Tj3AppBase.rb:161:in 'TaskJuggler::Tj3AppBase#main'
/home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.4/lib/tj3webd.rb:16:in '<top (required)>'
<internal:/usr/share/rubygems/rubygems/core_ext/kernel_require.rb>:136:in 'Kernel#require'
<internal:/usr/share/rubygems/rubygems/core_ext/kernel_require.rb>:136:in 'Kernel#require'
/home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.4/bin/tj3webd:4:in '<top (required)>'
/home/asinha/bin/tj3webd:25:in 'Kernel#load'
/home/asinha/bin/tj3webd:25:in '<main>'

*******************************************************************************
You have triggered a bug in TaskJuggler version 3.8.4!
Please see the user manual on how to get this bug fixed!
http://www.taskjuggler.org/tj3/manual/Reporting_Bugs.html#Reporting_Bugs_and_Feature_Requests
*******************************************************************************
/home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.4/lib/taskjuggler/MessageHandler.rb:301:in 'TaskJuggler::MessageHandlerInstance#addMessage': RuntimeError (RuntimeError)
        from /home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.4/lib/taskjuggler/MessageHandler.rb:191:in 'TaskJuggler::MessageHandlerInstance#fatal'
        from /home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.4/lib/taskjuggler/MessageHandler.rb:312:in 'TaskJuggler::MessageHandler#fatal'
        from /home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.4/lib/taskjuggler/Tj3AppBase.rb:176:in 'TaskJuggler::Tj3AppBase#main'
        from /home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.4/lib/tj3webd.rb:16:in '<top (required)>'
        from <internal:/usr/share/rubygems/rubygems/core_ext/kernel_require.rb>:136:in 'Kernel#require'
        from <internal:/usr/share/rubygems/rubygems/core_ext/kernel_require.rb>:136:in 'Kernel#require'
        from /home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.4/bin/tj3webd:4:in '<top (required)>'
        from /home/asinha/bin/tj3webd:25:in 'Kernel#load'
        from /home/asinha/bin/tj3webd:25:in '<main>'
/home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.4/lib/taskjuggler/daemon/Daemon.rb:72:in 'IO#reopen': no implicit conversion of StringIO into String (TypeError)

      $stdout.reopen(StringIO.new)
                     ^^^^^^^^^^^^
        from /home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.4/lib/taskjuggler/daemon/Daemon.rb:72:in 'TaskJuggler::Daemon#start'
        from /home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.4/lib/taskjuggler/daemon/WebServer.rb:62:in 'TaskJuggler::WebServer#start'
        from /home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.4/lib/taskjuggler/apps/Tj3WebD.rb:99:in 'TaskJuggler::Tj3WebD#appMain'
        from /home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.4/lib/taskjuggler/Tj3AppBase.rb:161:in 'TaskJuggler::Tj3AppBase#main'
        from /home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.4/lib/tj3webd.rb:16:in '<top (required)>'
        from <internal:/usr/share/rubygems/rubygems/core_ext/kernel_require.rb>:136:in 'Kernel#require'
        from <internal:/usr/share/rubygems/rubygems/core_ext/kernel_require.rb>:136:in 'Kernel#require'
        from /home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.4/bin/tj3webd:4:in '<top (required)>'
        from /home/asinha/bin/tj3webd:25:in 'Kernel#load'
        from /home/asinha/bin/tj3webd:25:in '<main>'
Exception 'TypeError' at /home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.4/lib/taskjuggler/daemon/Daemon.rb:72 - no implicit conversion of StringIO into String
Fatal: no implicit conversion of StringIO into String
/home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.4/lib/taskjuggler/daemon/Daemon.rb:72:in 'IO#reopen'
/home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.4/lib/taskjuggler/daemon/Daemon.rb:72:in 'TaskJuggler::Daemon#start'
/home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.4/lib/taskjuggler/daemon/ProjectBroker.rb:91:in 'TaskJuggler::ProjectBroker#start'
/home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.4/lib/taskjuggler/apps/Tj3Daemon.rb:116:in 'TaskJuggler::Tj3Daemon#appMain'
/home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.4/lib/taskjuggler/Tj3AppBase.rb:161:in 'TaskJuggler::Tj3AppBase#main'
/home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.4/lib/tj3d.rb:16:in '<top (required)>'
<internal:/usr/share/rubygems/rubygems/core_ext/kernel_require.rb>:136:in 'Kernel#require'
<internal:/usr/share/rubygems/rubygems/core_ext/kernel_require.rb>:136:in 'Kernel#require'
/home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.4/bin/tj3d:4:in '<top (required)>'
/home/asinha/bin/tj3d:25:in 'Kernel#load'
/home/asinha/bin/tj3d:25:in '<main>'

*******************************************************************************
You have triggered a bug in TaskJuggler version 3.8.4!
Please see the user manual on how to get this bug fixed!
http://www.taskjuggler.org/tj3/manual/Reporting_Bugs.html#Reporting_Bugs_and_Feature_Requests
*******************************************************************************

Exception 'RuntimeError' at /home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.4/lib/taskjuggler/MessageHandler.rb:301 - RuntimeError
Exception 'RuntimeError' at <internal:ast>:96 - cannot get AST for ISEQ compiled by prism
/home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.4/lib/taskjuggler/MessageHandler.rb:301:in 'TaskJuggler::MessageHandlerInstance#addMessage': RuntimeError (RuntimeError)
        from /home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.4/lib/taskjuggler/MessageHandler.rb:191:in 'TaskJuggler::MessageHandlerInstance#fatal'
        from /home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.4/lib/taskjuggler/MessageHandler.rb:312:in 'TaskJuggler::MessageHandler#fatal'
        from /home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.4/lib/taskjuggler/Tj3AppBase.rb:176:in 'TaskJuggler::Tj3AppBase#main'
        from /home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.4/lib/tj3d.rb:16:in '<top (required)>'
        from <internal:/usr/share/rubygems/rubygems/core_ext/kernel_require.rb>:136:in 'Kernel#require'
        from <internal:/usr/share/rubygems/rubygems/core_ext/kernel_require.rb>:136:in 'Kernel#require'
        from /home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.4/bin/tj3d:4:in '<top (required)>'
        from /home/asinha/bin/tj3d:25:in 'Kernel#load'
        from /home/asinha/bin/tj3d:25:in '<main>'
/home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.4/lib/taskjuggler/daemon/Daemon.rb:72:in 'IO#reopen': no implicit conversion of StringIO into String (TypeError)

      $stdout.reopen(StringIO.new)
                     ^^^^^^^^^^^^
        from /home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.4/lib/taskjuggler/daemon/Daemon.rb:72:in 'TaskJuggler::Daemon#start'
        from /home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.4/lib/taskjuggler/daemon/ProjectBroker.rb:91:in 'TaskJuggler::ProjectBroker#start'
        from /home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.4/lib/taskjuggler/apps/Tj3Daemon.rb:116:in 'TaskJuggler::Tj3Daemon#appMain'
        from /home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.4/lib/taskjuggler/Tj3AppBase.rb:161:in 'TaskJuggler::Tj3AppBase#main'
        from /home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.4/lib/tj3d.rb:16:in '<top (required)>'
        from <internal:/usr/share/rubygems/rubygems/core_ext/kernel_require.rb>:136:in 'Kernel#require'
        from <internal:/usr/share/rubygems/rubygems/core_ext/kernel_require.rb>:136:in 'Kernel#require'
        from /home/asinha/.local/share/gem/ruby/gems/taskjuggler-3.8.4/bin/tj3d:4:in '<top (required)>'
        from /home/asinha/bin/tj3d:25:in 'Kernel#load'
        from /home/asinha/bin/tj3d:25:in '<main>'

This is with commit 3b36c79