Rust 1.6 arm incompatibility

[MagaTailor]

There's been a wee breakage causing lots of woe:

Compiling rusqlite v0.4.0
/home/odroid/.cargo/registry/src/github.com-48ad6e4054423464/rusqlite-0.4.0/src/types.rs:110:60: 110:74 error: mismatched types:
 expected `*const i8`,
    found `*const u8`
(expected i8,
    found u8) [E0308]
/home/odroid/.cargo/registry/src/github.com-48ad6e4054423464/rusqlite-0.4.0/src/types.rs:110             Ok(c_str) => ffi::sqlite3_bind_text(stmt, col, c_str.as_ptr(), length as c_int,
                                                                                                                                                        ^~~~~~~~~~~~~~
/home/odroid/.cargo/registry/src/github.com-48ad6e4054423464/rusqlite-0.4.0/src/types.rs:110:60: 110:74 help: run `rustc --explain E0308` to see a detailed explanation
/home/odroid/.cargo/registry/src/github.com-48ad6e4054423464/rusqlite-0.4.0/src/types.rs:204:42: 204:65 error: mismatched types:
 expected `*const u8`,
    found `*const i8`
(expected u8,
    found i8) [E0308]
/home/odroid/.cargo/registry/src/github.com-48ad6e4054423464/rusqlite-0.4.0/src/types.rs:204             let c_slice = CStr::from_ptr(c_text as *const c_char).to_bytes();
                                                                                                                                      ^~~~~~~~~~~~~~~~~~~~~~~
/home/odroid/.cargo/registry/src/github.com-48ad6e4054423464/rusqlite-0.4.0/src/types.rs:204:42: 204:65 help: run `rustc --explain E0308` to see a detailed explanation
/home/odroid/.cargo/registry/src/github.com-48ad6e4054423464/rusqlite-0.4.0/src/lib.rs:88:34: 88:40 error: mismatched types:
 expected `*const u8`,
    found `*const i8`
(expected u8,
    found i8) [E0308]
/home/odroid/.cargo/registry/src/github.com-48ad6e4054423464/rusqlite-0.4.0/src/lib.rs:88     let c_slice = CStr::from_ptr(errmsg).to_bytes();
                                                                                                                           ^~~~~~
/home/odroid/.cargo/registry/src/github.com-48ad6e4054423464/rusqlite-0.4.0/src/lib.rs:88:34: 88:40 help: run `rustc --explain E0308` to see a detailed explanation
/home/odroid/.cargo/registry/src/github.com-48ad6e4054423464/rusqlite-0.4.0/src/lib.rs:486:42: 486:57 error: mismatched types:
 expected `*const i8`,
    found `*const u8`
(expected i8,
    found u8) [E0308]
/home/odroid/.cargo/registry/src/github.com-48ad6e4054423464/rusqlite-0.4.0/src/lib.rs:486             let r = ffi::sqlite3_open_v2(c_path.as_ptr(), &mut db, flags.bits(), ptr::null());
                                                                                                                                    ^~~~~~~~~~~~~~~
/home/odroid/.cargo/registry/src/github.com-48ad6e4054423464/rusqlite-0.4.0/src/lib.rs:486:42: 486:57 help: run `rustc --explain E0308` to see a detailed explanation
/home/odroid/.cargo/registry/src/github.com-48ad6e4054423464/rusqlite-0.4.0/src/lib.rs:543:50: 543:64 error: mismatched types:
 expected `*const i8`,
    found `*const u8`
(expected i8,
    found u8) [E0308]
/home/odroid/.cargo/registry/src/github.com-48ad6e4054423464/rusqlite-0.4.0/src/lib.rs:543             let r = ffi::sqlite3_exec(self.db(), c_sql.as_ptr(), None, ptr::null_mut(), &mut errmsg);
                                                                                                                                            ^~~~~~~~~~~~~~
/home/odroid/.cargo/registry/src/github.com-48ad6e4054423464/rusqlite-0.4.0/src/lib.rs:543:50: 543:64 help: run `rustc --explain E0308` to see a detailed explanation
/home/odroid/.cargo/registry/src/github.com-48ad6e4054423464/rusqlite-0.4.0/src/lib.rs:588:48: 588:62 error: mismatched types:
 expected `*const i8`,
    found `*const u8`
(expected i8,
    found u8) [E0308]
/home/odroid/.cargo/registry/src/github.com-48ad6e4054423464/rusqlite-0.4.0/src/lib.rs:588             ffi::sqlite3_prepare_v2(self.db(), c_sql.as_ptr(), len_with_nul, &mut c_stmt,
                                                                                                                                          ^~~~~~~~~~~~~~
/home/odroid/.cargo/registry/src/github.com-48ad6e4054423464/rusqlite-0.4.0/src/lib.rs:588:48: 588:62 help: run `rustc --explain E0308` to see a detailed explanation
/home/odroid/.cargo/registry/src/github.com-48ad6e4054423464/rusqlite-0.4.0/src/lib.rs:628:32: 628:70 error: mismatched types:
 expected `*const u8`,
    found `*const i8`
(expected u8,
    found i8) [E0308]
/home/odroid/.cargo/registry/src/github.com-48ad6e4054423464/rusqlite-0.4.0/src/lib.rs:628                 CStr::from_ptr(ffi::sqlite3_column_name(self.stmt, i))
                                                                                                                          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/odroid/.cargo/registry/src/github.com-48ad6e4054423464/rusqlite-0.4.0/src/lib.rs:628:32: 628:70 help: run `rustc --explain E0308` to see a detailed explanation
/home/odroid/.cargo/registry/src/github.com-48ad6e4054423464/rusqlite-0.4.0/src/lib.rs:780:42: 780:69 error: mismatched types:
 expected `*const u8`,
    found `*const i8`
(expected u8,
    found i8) [E0308]
/home/odroid/.cargo/registry/src/github.com-48ad6e4054423464/rusqlite-0.4.0/src/lib.rs:780             let c_slice = CStr::from_ptr(ffi::sqlite3_sql(self.stmt)).to_bytes();
                                                                                                                                    ^~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/odroid/.cargo/registry/src/github.com-48ad6e4054423464/rusqlite-0.4.0/src/lib.rs:780:42: 780:69 help: run `rustc --explain E0308` to see a detailed explanation
error: aborting due to 8 previous errors

[ivanceras]

Unfortunately I don't have an arm machine to test this out. I am certain that the code that need to be fixed is in https://github.com/jgallagher/rusqlite.

[MagaTailor]

Oh, sorry, I was tired and seeing r2d2 everywhere :)