Thread::Backtrace

Class

An internal representation of the backtrace. The user will never interact with objects of this class directly, but class methods can be used to get backtrace settings of the current session.

Class Methods

Thread::Backtrace::limit → integer

vm_backtrace.c View on GitHub

          
            static VALUE
backtrace_limit(VALUE self)
{
    return LONG2NUM(rb_backtrace_length_limit);
}

Returns maximum backtrace length set by --backtrace-limit command-line option. The default is -1 which means unlimited backtraces. If the value is zero or positive, the error backtraces, produced by Exception#full_message, are abbreviated and the extra lines are replaced by ... 3 levels...

$ ruby -r net/http -e "p Thread::Backtrace.limit; Net::HTTP.get(URI('http://wrong.address'))"
- 1
.../lib/ruby/3.1.0/socket.rb:227:in `getaddrinfo': Failed to open TCP connection to wrong.address:80 (getaddrinfo: Name or service not known) (SocketError)
    from .../lib/ruby/3.1.0/socket.rb:227:in `foreach'
    from .../lib/ruby/3.1.0/socket.rb:632:in `tcp'
    from .../lib/ruby/3.1.0/net/http.rb:998:in `connect'
    from .../lib/ruby/3.1.0/net/http.rb:976:in `do_start'
    from .../lib/ruby/3.1.0/net/http.rb:965:in `start'
    from .../lib/ruby/3.1.0/net/http.rb:627:in `start'
    from .../lib/ruby/3.1.0/net/http.rb:503:in `get_response'
    from .../lib/ruby/3.1.0/net/http.rb:474:in `get'
.../lib/ruby/3.1.0/socket.rb:227:in `getaddrinfo': getaddrinfo: Name or service not known (SocketError)
    from .../lib/ruby/3.1.0/socket.rb:227:in `foreach'
    from .../lib/ruby/3.1.0/socket.rb:632:in `tcp'
    from .../lib/ruby/3.1.0/net/http.rb:998:in `connect'
    from .../lib/ruby/3.1.0/net/http.rb:976:in `do_start'
    from .../lib/ruby/3.1.0/net/http.rb:965:in `start'
    from .../lib/ruby/3.1.0/net/http.rb:627:in `start'
    from .../lib/ruby/3.1.0/net/http.rb:503:in `get_response'
    from .../lib/ruby/3.1.0/net/http.rb:474:in `get'
    from -e:1:in `<main>'

$ ruby --backtrace-limit 2 -r net/http -e "p Thread::Backtrace.limit; Net::HTTP.get(URI('http://wrong.address'))"
2
.../lib/ruby/3.1.0/socket.rb:227:in `getaddrinfo': Failed to open TCP connection to wrong.address:80 (getaddrinfo: Name or service not known) (SocketError)
    from .../lib/ruby/3.1.0/socket.rb:227:in `foreach'
    from .../lib/ruby/3.1.0/socket.rb:632:in `tcp'
     ... 7 levels...
.../lib/ruby/3.1.0/socket.rb:227:in `getaddrinfo': getaddrinfo: Name or service not known (SocketError)
    from .../lib/ruby/3.1.0/socket.rb:227:in `foreach'
    from .../lib/ruby/3.1.0/socket.rb:632:in `tcp'
     ... 7 levels...

$ ruby --backtrace-limit 0 -r net/http -e "p Thread::Backtrace.limit; Net::HTTP.get(URI('http://wrong.address'))"
0
.../lib/ruby/3.1.0/socket.rb:227:in `getaddrinfo': Failed to open TCP connection to wrong.address:80 (getaddrinfo: Name or service not known) (SocketError)
     ... 9 levels...
.../lib/ruby/3.1.0/socket.rb:227:in `getaddrinfo': getaddrinfo: Name or service not known (SocketError)
     ... 9 levels...