Found two different crates with name…

[jirutka]

...
cargo:crates-io: Building crates-io-0.2.0 (needed by: cargo-0.11.0)
cargo:crates-io:  PROFILE="release" TARGET="x86_64-unknown-linux-musl" CARGO_MANIFEST_DIR="/tmp/cargo/crates-io-0.2.0" OUT_DIR="/tmp/cargo" CARGO_PKG_VERSION_MAJOR="0" CARGO_PKG_VERSION="0.2.0" CARGO_PKG_VERSION_PATCH="0" HOST="x86_64-unknown-linux-musl" PATH="/home/jirutjak/rustc/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin" DEBUG="0" OPT_LEVEL="0" CARGO_PKG_VERSION_MINOR="2" NUM_JOBS="1" CARGO_PKG_VERSION_PRE="" rustc /tmp/cargo/crates-io-0.2.0/lib.rs --crate-name crates_io --crate-type lib -C extra-filename=-0_2_0 --out-dir /tmp/cargo --emit=dep-info,link --target x86_64-unknown-linux-musl -L /tmp/cargo -L /tmp/cargo/lib -l dylib=ssl -l dylib=crypto -L /tmp/cargo/lib -l static=curl --extern curl=/tmp/cargo/libcurl-0_2_19.rlib --extern rustc_serialize=/tmp/cargo/librustc_serialize-0_3_19.rlib --extern url=/tmp/cargo/liburl-0_2_38.rlib
cargo:crates-io: /tmp/cargo/crates-io-0.2.0/lib.rs:2:1: 2:18 error: found two different crates with name `url` that are not distinguished by differing `-C metadata`. This will result in symbol conflicts between the two. [E0523]
cargo:crates-io: /tmp/cargo/crates-io-0.2.0/lib.rs:2 extern crate url;
cargo:crates-io:                                     ^~~~~~~~~~~~~~~~~

Exception:
 from ./bootstrap.py, line 1002:
 build command failed: 101

ls /tmp/cargo/ | grep '^url-*'
url-0.2.38
url-0_2_38.d
url-1.0.0
url-1.1.1
url-1_1_1.d

[binarycrusader]

The problem appears to be that git2-curl and git2 require url 1.0, while cargo wants 1.1. Also, the embedded src/crates-io/Cargo.toml in cargo itself also wants url 1.0.

Actually, this appears to be a bug in the bootstrap parsing of the semantic versions. A dependency specifying version "1.0" allows 1.1, 1.2, etc. since the leftmost digit is not changing.