rusti: Cannot print not-implicitly-copyable variables

[gifnksm]

$ rusti                                                                                                              (git)-[master] -
WARNING: The Rust REPL is experimental and may be
unstable. If you encounter problems, please use the
compiler instead. Type :help for help.
rusti> let v = ~[1,2,3];
rusti> v
<anon>:43:36: 43:37 error: use of moved value: `v`
<anon>:43                 let local: ~[int] = v;
                                              ^
<anon>:41:0: 41:1 note: `v` moved here because it has type `~[int]`, which is moved by default (use `copy` to override)
<anon>:41 v
          ^
error: aborting due to previous error
rust: task failed at 'explicit failure', /home/nksm/pkg/rust/src/rust/src/libsyntax/diagnostic.rs:95

I think rusti should prints the value of v.

[gifnksm]

workaround for this issue.

rusti> let v = ~[1,2,3];
rusti> copy v
~[1, 2, 3]

[alexcrichton]

I was thinking about this awhile back. I think that the best way to go about doing this would be to just don't re-serialize moved variables. Basically after the user-input code is executed, detect if any of the local bound variables were moved, and don't reserialize them.

The bad part is that you can move out of a variable and then use it in a later statement, but this is purely a debugging repl so I don't think that it's too bad.