Here we implement a naive solution to #5605 which catches the case that
a provided source contains an object which cannot be inspected, because
an object contained within in has an #inspect string that returns a
string that is incompatible with the encoding in
`Encoding.default_external` or a string which cannot be downcast to
7-bit ascii.
The Ruby VM implementation of "#inspect" implements this checking on
these lines of code: http://git.io/vZYNS. A Ruby level override of
this method does not cause this problem. For example:
```ruby
class Foo
def inspect
"😍".encode("UTF-16LE")
end
```
will not cause the problem, because that's a Ruby implementation and the
VM's checks don't occur.
However, if we have an Object which **does** use the VM implementation
of inspect, that contains an object that has an inspect string which
returns non-ascii, we encounter the bug. For example:
```ruby
class Bar
def inspect
"😍".encode("UTF-16LE")
end
end
class Foo
def initialize
@bar = Bar.new
end
end
Foo.new.inspect
```
Will cause the issue.
The solution this patch provides basically catches the encoding error
and inserts a string which attempts to help the user work out which
object was provided without blowing up. Most likely, this was caused
by a user having a weird encoding coming out of one of the sources
passed in, but without a full repro case, it's not clear whether a patch
should be applied to a different object in the system.
Closes#5605.
With this change, the `Vagrant::plugins_enabled?` is now false when the
embedded Bundler is not available.
Resolve the broken RSpec unit tests after
479323f1e849b7a8cc570c703566a607a4c6353c.
Deleting the lock file can fail when another process is currently trying to acquire it (-> race condition).
It is safe to ignore this error since the other process will eventually acquire the lock and again try to delete the lock file.
If the Vagrantfile has some kind of error, display not only
its path and the exception message, but also the originating
line number and exception class.
Also log the full backtrace when the error is in a provider
block, just as it is done when it's outside a provider block.
