Cannot crosscompile libcore

[farcaller]

Latest libcore compilation fails:

rustc --opt-level 2 -Z no-landing-pads --target thumbv7m-linux-eabi -Ctarget-cpu=cortex-m3 -C relocation_model=static -L /Users/farcaller/src/zinc/build --out-dir /Users/farcaller/src/zinc/build /Users/farcaller/src/zinc/thirdparty/libcore/lib.rs

/Users/farcaller/src/zinc/thirdparty/libcore/ptr.rs:215:5: 219:2 error: type `&mut iter::Range<uint>` does not implement any method in scope named `next`
/Users/farcaller/src/zinc/thirdparty/libcore/ptr.rs:215     for e in range(0, len) {
/Users/farcaller/src/zinc/thirdparty/libcore/ptr.rs:216         let n = arr.offset(e as int);
/Users/farcaller/src/zinc/thirdparty/libcore/ptr.rs:217         cb(*n);
/Users/farcaller/src/zinc/thirdparty/libcore/ptr.rs:218     }
/Users/farcaller/src/zinc/thirdparty/libcore/ptr.rs:219 }
/Users/farcaller/src/zinc/thirdparty/libcore/char.rs:186:5: 195:2 error: type `&mut iter::RangeStep<i32>` does not implement any method in scope named `next`
/Users/farcaller/src/zinc/thirdparty/libcore/char.rs:186     for offset in range_step::<i32>(4 * (pad - 1), -1, -4) {
/Users/farcaller/src/zinc/thirdparty/libcore/char.rs:187         let offset = offset as uint;
/Users/farcaller/src/zinc/thirdparty/libcore/char.rs:188         unsafe {
/Users/farcaller/src/zinc/thirdparty/libcore/char.rs:189             match ((c as i32) >> offset) & 0xf {
/Users/farcaller/src/zinc/thirdparty/libcore/char.rs:190                 i @ 0 .. 9 => { f(transmute('0' as i32 + i)); }
/Users/farcaller/src/zinc/thirdparty/libcore/char.rs:191                 i => { f(transmute('a' as i32 + (i - 10))); }
                                                         ...
/Users/farcaller/src/zinc/thirdparty/libcore/fmt/num.rs:51:13: 58:10 error: type `&mut iter::Rev<slice::MutItems<'_,u8>>` does not implement any method in scope named `next`
/Users/farcaller/src/zinc/thirdparty/libcore/fmt/num.rs:51             for byte in buf.mut_iter().rev() {
/Users/farcaller/src/zinc/thirdparty/libcore/fmt/num.rs:52                 let n = x % base;                         // Get the current place value.
/Users/farcaller/src/zinc/thirdparty/libcore/fmt/num.rs:53                 x = x / base;                             // Deaccumulate the number.
/Users/farcaller/src/zinc/thirdparty/libcore/fmt/num.rs:54                 *byte = self.digit(cast(n).unwrap());     // Store the digit in the buffer.
/Users/farcaller/src/zinc/thirdparty/libcore/fmt/num.rs:55                 curr -= 1;
/Users/farcaller/src/zinc/thirdparty/libcore/fmt/num.rs:56                 if x == zero() { break; }                 // No more digits left to accumulate.
                                                           ...
/Users/farcaller/src/zinc/thirdparty/libcore/fmt/num.rs:60:13: 67:10 error: type `&mut iter::Rev<slice::MutItems<'_,u8>>` does not implement any method in scope named `next`
/Users/farcaller/src/zinc/thirdparty/libcore/fmt/num.rs:60             for byte in buf.mut_iter().rev() {
/Users/farcaller/src/zinc/thirdparty/libcore/fmt/num.rs:61                 let n = -(x % base);                      // Get the current place value.
/Users/farcaller/src/zinc/thirdparty/libcore/fmt/num.rs:62                 x = x / base;                             // Deaccumulate the number.
/Users/farcaller/src/zinc/thirdparty/libcore/fmt/num.rs:63                 *byte = self.digit(cast(n).unwrap());     // Store the digit in the buffer.
/Users/farcaller/src/zinc/thirdparty/libcore/fmt/num.rs:64                 curr -= 1;
/Users/farcaller/src/zinc/thirdparty/libcore/fmt/num.rs:65                 if x == zero() { break; }                 // No more digits left to accumulate.
                                                           ...
/Users/farcaller/src/zinc/thirdparty/libcore/fmt/float.rs:276:25: 279:28 error: type `&mut iter::Rev<iter::Range<uint>>` does not implement any method in scope named `next`
/Users/farcaller/src/zinc/thirdparty/libcore/fmt/float.rs:276                         for j in range(i as uint + 1, end).rev() {
/Users/farcaller/src/zinc/thirdparty/libcore/fmt/float.rs:277                             buf[j + 1] = buf[j];
/Users/farcaller/src/zinc/thirdparty/libcore/fmt/float.rs:278                         }
/Users/farcaller/src/zinc/thirdparty/libcore/fmt/float.rs:279                         buf[(i + 1) as uint] = value2ascii(1);
error: aborting due to 5 previous errors

For some strange reason, it fails in different way on travis (that's using same rust-nightly):

/home/travis/build/hackndev/zinc/thirdparty/libcore/fmt/num.rs:50:13: 57:10 error: unresolved enum variant, struct or const `Some`
/home/travis/build/hackndev/zinc/thirdparty/libcore/fmt/num.rs:50             for byte in buf.mut_iter().rev() {
/home/travis/build/hackndev/zinc/thirdparty/libcore/fmt/num.rs:51                 let n = x % base;                         // Get the current place value.
/home/travis/build/hackndev/zinc/thirdparty/libcore/fmt/num.rs:52                 x = x / base;                             // Deaccumulate the number.
/home/travis/build/hackndev/zinc/thirdparty/libcore/fmt/num.rs:53                 *byte = self.digit(cast(n).unwrap());     // Store the digit in the buffer.
/home/travis/build/hackndev/zinc/thirdparty/libcore/fmt/num.rs:54                 curr -= 1;
/home/travis/build/hackndev/zinc/thirdparty/libcore/fmt/num.rs:55                 if x == zero() { break; }                 // No more digits left to accumulate.
                                                                  ...
/home/travis/build/hackndev/zinc/thirdparty/libcore/fmt/num.rs:59:13: 66:10 error: unresolved enum variant, struct or const `Some`
/home/travis/build/hackndev/zinc/thirdparty/libcore/fmt/num.rs:59             for byte in buf.mut_iter().rev() {
/home/travis/build/hackndev/zinc/thirdparty/libcore/fmt/num.rs:60                 let n = -(x % base);                      // Get the current place value.
/home/travis/build/hackndev/zinc/thirdparty/libcore/fmt/num.rs:61                 x = x / base;                             // Deaccumulate the number.
/home/travis/build/hackndev/zinc/thirdparty/libcore/fmt/num.rs:62                 *byte = self.digit(cast(n).unwrap());     // Store the digit in the buffer.
/home/travis/build/hackndev/zinc/thirdparty/libcore/fmt/num.rs:63                 curr -= 1;
/home/travis/build/hackndev/zinc/thirdparty/libcore/fmt/num.rs:64                 if x == zero() { break; }                 // No more digits left to accumulate.
                                                                  ...
/home/travis/build/hackndev/zinc/thirdparty/libcore/fmt/float.rs:274:25: 277:28 error: unresolved enum variant, struct or const `Some`
/home/travis/build/hackndev/zinc/thirdparty/libcore/fmt/float.rs:274                         for j in range(i as uint + 1, end).rev() {
/home/travis/build/hackndev/zinc/thirdparty/libcore/fmt/float.rs:275                             buf[j + 1] = buf[j];
/home/travis/build/hackndev/zinc/thirdparty/libcore/fmt/float.rs:276                         }
/home/travis/build/hackndev/zinc/thirdparty/libcore/fmt/float.rs:277                         buf[(i + 1) as uint] = value2ascii(1);
error: aborting due to 3 previous errors

[huonw]

Does your rustc version precisely match the version of libcore you are compiling?

[farcaller]

yes, in the first case. no in the second.

[farcaller]

Whoops. Yes, it works when version matches exactly.