Issue 1:
Just cloned the rust0.6 from today.

And build it on Ubuntu 12.10 x86_64

when I run rusti and enter 1+1 ,it happens Segmentation fault .

Here som gdb log:

GNU gdb (GDB) 7.5-ubuntu

Copyright (C) 2012 Free Software Foundation, Inc.

License GPLv3+: GNU GPL version 3 or later http://gnu.org/licenses/gpl.html

This is free software: you are free to change and redistribute it.

There is NO WARRANTY, to the extent permitted by law. Type "show copying"

and "show warranty" for details.

This GDB was configured as "x86_64-linux-gnu".

For bug reporting instructions, please see:

http://www.gnu.org/software/gdb/bugs/...

Reading symbols from /usr/local/bin/rusti...(no debugging symbols found)...done.

[New LWP 5883]

[New LWP 5884]

[New LWP 5881]

[New LWP 5880]

[New LWP 5882]

warning: Can't read pathname for load map: 输入/输出错误.

[Thread debugging using libthread_db enabled]

Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".

Core was generated by `rusti'.

Program terminated with signal 11, Segmentation fault.

#0 0x00007f9d32f69018 in ?? () from /lib64/ld-linux-x86-64.so.2

(gdb) bt full

#0 0x00007f9d32f69018 in ?? () from /lib64/ld-linux-x86-64.so.2

No symbol table info available.

#1 0x00007f9d32f6b63d in ?? () from /lib64/ld-linux-x86-64.so.2

No symbol table info available.

#2 0x00007f9d32f7685b in ?? () from /lib64/ld-linux-x86-64.so.2

No symbol table info available.

#3 0x00007f9d32f72186 in ?? () from /lib64/ld-linux-x86-64.so.2

No symbol table info available.

#4 0x00007f9d32f7632a in ?? () from /lib64/ld-linux-x86-64.so.2

No symbol table info available.

#5 0x00007f9d30710f26 in ?? () from /lib/x86_64-linux-gnu/libdl.so.2

No symbol table info available.

#6 0x00007f9d32f72186 in ?? () from /lib64/ld-linux-x86-64.so.2

No symbol table info available.

#7 0x00007f9d3071152f in ?? () from /lib/x86_64-linux-gnu/libdl.so.2

No symbol table info available.

#8 0x00007f9d30710fc1 in dlopen () from /lib/x86_64-linux-gnu/libdl.so.2

No symbol table info available.

#9 0x00007f9d2fc8cd1a in llvm::sys::DynamicLibrary::getPermanentLibrary(char const_, std::string_) () from /usr/local/bin/../lib/./librustllvm.so

No symbol table info available.

#10 0x00007f9d2f233d0c in RustMCJITMemoryManager::loadCrate (

this=0x7f9d205a3020, file=<optimized out>, err=err@entry=0x7f9d201008a0)

---Type to continue, or q to quit---

at /usr/local/src/rust/src/rustllvm/RustWrapper.cpp:197

crate = {static Invalid = 0 '\000', Data = 0x7f9d2f0a7878}

#11 0x00007f9d2f234587 in LLVMRustLoadCrate (mem=,

crate=<optimized out>)
at /usr/local/src/rust/src/rustllvm/RustWrapper.cpp:328
manager = <optimized out>
Err = {static npos = <optimized out>,
_M_dataplus = {<std::allocator<char>> = {<__gnu_cxx::new_allocator<char>> = {<No data fields>}, <No data fields>}, _M_p = 0x7f9d2ee404d8 ""}}
__PRETTY_FUNCTION__ = "bool LLVMRustLoadCrate(void*, const char*)"

#12 0x00007f9d31e223ca in LLVMRustLoadCrate__c_stack_shim ()

from /usr/local/bin/../lib/librustc-c84825241471686d-0.6.so

No symbol table info available.

#13 0x00007f9d31218ab9 in __morestack ()

from /usr/local/bin/../lib/librustrt.so

No symbol table info available.

#14 0x00007f9d31207174 in call_on_c_stack (

fn_ptr=0x7f9d31e22390 <LLVMRustLoadCrate__c_stack_shim>,
args=0x7f9d201035f0, this=0x7f9d28108a10)
at /usr/local/src/rust/src/rt/rust_task.h:491
prev_rust_sp = 0
borrowed_a_c_stack = true
sp = <optimized out>

---Type to continue, or q to quit---

#15 upcall_call_shim_on_c_stack (args=0x7f9d201035f0,

fn_ptr=0x7f9d31e22390 <LLVMRustLoadCrate__c_stack_shim>)
at /usr/local/src/rust/src/rt/rust_upcall.cpp:60
task = 0x7f9d28108a10
__PRETTY_FUNCTION__ = "void upcall_call_shim_on_c_stack(void*, void*)"

#16 0x00007f9d31d8beb4 in back:🔗:jit::exec::anon::anon::expr_fn_76891 ()

from /usr/local/bin/../lib/librustc-c84825241471686d-0.6.so

No symbol table info available.

#17 0x00007f9d318d2158 in str::as_c_str_28724::_b760a7dcc0e4db::_06 ()

from /usr/local/bin/../lib/librustc-c84825241471686d-0.6.so

No symbol table info available.

#18 0x00007f9d31d8b949 in back:🔗:jit::exec::_c3905cfecb8b69e9::_06 ()

from /usr/local/bin/../lib/librustc-c84825241471686d-0.6.so

No symbol table info available.

#19 0x00007f9d31464d65 in run::_ee4d29fb4c6e65c::_06 ()

from /usr/local/bin/../lib/librusti-5047c7f210c7cac8-0.6.so

No symbol table info available.

#20 0x00007f9d31496aa8 in __morestack ()

from /usr/local/bin/../lib/librusti-5047c7f210c7cac8-0.6.so

No symbol table info available.

#21 0x00007f9d31495a60 in run_line::anon::expr_fn_13894 ()

from /usr/local/bin/../lib/librusti-5047c7f210c7cac8-0.6.so

No symbol table info available.

---Type to continue, or q to quit---

#22 0x00007f9d31495235 in task::extensions::try_13791::anon::expr_fn_13846

() from /usr/local/bin/../lib/librusti-5047c7f210c7cac8-0.6.so

No symbol table info available.

#23 0x00007f9d32bf814f in task::spawn::spawn_raw::make_child_wrapper::anon::expr_fn_10036 () from /usr/local/bin/../lib/libcore-c3ca5d77d81b46c1-0.6.so

No symbol table info available.

#24 0x00007f9d32c2f520 in __morestack ()

from /usr/local/bin/../lib/libcore-c3ca5d77d81b46c1-0.6.so

No symbol table info available.

#25 0x00007f9d312057f4 in task_start_wrapper (a=0x7f9d28109810)

at /usr/local/src/rust/src/rt/rust_task.cpp:160
__PRETTY_FUNCTION__ = "void task_start_wrapper(spawn_args*)"
env = <optimized out>
ca = {spargs = 0x0, threw_exception = false}
task = 0x7f9d28108a10
threw_exception = false

#26 0x0000000000000000 in ?? ()

No symbol table info available.

(gdb) quit

Issue 2:
rustc v0.6:

$ rusti
rusti> fn foo() { for 5.times { io::println("hi"); } }
[1] 11363 segmentation fault (core dumped) rusti

$ rusti
rusti> let x = 1;
<anon>:35:4: 35:7 warning: unused variable: `x`
<anon>:35 let x = 1;
^~~
[1] 11937 segmentation fault (core dumped) rusti

I was able to reproduce this today by using ctrl+c to exit rusti. Subsequent rusti runs segfaulted regardless of the statement.