Fails to build in cargo-vendor

[flaviut]

Installing cargo-vendor...
    Updating registry `https://github.com/rust-lang/crates.io-index`
  Installing cargo-vendor v0.1.22
   Compiling serde v1.0.82
   Compiling semver-parser v0.7.0
   Compiling proc-macro2 v0.4.24
   Compiling pkg-config v0.3.14
   Compiling cc v1.0.26
   Compiling version_check v0.1.5
   Compiling unicode-xid v0.1.0
   Compiling libc v0.2.45
   Compiling void v1.0.2
   Compiling rand_core v0.3.0
   Compiling matches v0.1.8
   Compiling stable_deref_trait v1.1.1
   Compiling cfg-if v0.1.6
   Compiling failure_derive v0.1.3
   Compiling ucd-util v0.1.3
   Compiling scopeguard v0.3.3
   Compiling nodrop v0.1.13
   Compiling ryu v0.2.7
   Compiling lazy_static v1.2.0
   Compiling regex v1.1.0
   Compiling unicode-normalization v0.1.7
   Compiling openssl v0.10.15
   Compiling utf8-ranges v1.0.2
   Compiling percent-encoding v1.0.1
   Compiling memoffset v0.2.1
   Compiling rustc-demangle v0.1.9
   Compiling crc32fast v1.1.2
   Compiling foreign-types-shared v0.1.1
   Compiling unicode-width v0.1.5
   Compiling itoa v0.4.3
   Compiling crossbeam-utils v0.5.0
   Compiling openssl-probe v0.1.2
   Compiling fnv v1.0.6
   Compiling same-file v1.0.4
   Compiling quick-error v1.2.2
   Compiling bitflags v1.0.4
   Compiling ansi_term v0.11.0
   Compiling remove_dir_all v0.5.1
   Compiling strsim v0.7.0
   Compiling termcolor v1.0.4
   Compiling vec_map v0.8.1
   Compiling hex v0.3.2
   Compiling shell-escape v0.1.4
   Compiling glob v0.2.11
   Compiling rustc-workspace-hack v1.0.0
   Compiling lazycell v1.2.1
   Compiling bytesize v1.0.0
   Compiling home v0.3.3
   Compiling crossbeam-utils v0.6.3
   Compiling log v0.4.6
   Compiling unicode-bidi v0.3.4
   Compiling unreachable v1.0.0
   Compiling owning_ref v0.4.0
   Compiling arrayvec v0.4.8
   Compiling thread_local v0.3.6
   Compiling rand_core v0.2.2
   Compiling rand_hc v0.1.0
   Compiling rand_isaac v0.1.1
   Compiling rand_xorshift v0.1.0
   Compiling regex-syntax v0.6.4
   Compiling memchr v2.1.2
   Compiling foreign-types v0.3.2
   Compiling textwrap v0.10.0
   Compiling humantime v1.2.0
   Compiling walkdir v2.2.7
   Compiling smallvec v0.6.7
   Compiling lock_api v0.1.5
   Compiling crossbeam-epoch v0.6.1
   Compiling rand v0.5.5
   Compiling socket2 v0.3.8
   Compiling filetime v0.2.4
   Compiling atty v0.2.11
   Compiling fs2 v0.4.3
   Compiling jobserver v0.1.12
   Compiling num_cpus v1.9.0
   Compiling clap v2.32.0
   Compiling openssl-sys v0.9.39
   Compiling libnghttp2-sys v0.1.1
   Compiling libz-sys v1.0.25
   Compiling curl-sys v0.4.15
   Compiling backtrace-sys v0.1.24
   Compiling libssh2-sys v0.2.11
   Compiling libgit2-sys v0.7.10
   Compiling miniz-sys v0.1.11
   Compiling aho-corasick v0.6.9
   Compiling tar v0.4.20
   Compiling quote v0.6.10
   Compiling syn v0.15.22
   Compiling backtrace v0.3.12
   Compiling flate2 v1.0.6
   Compiling semver v0.9.0
   Compiling serde_json v1.0.33
error[E0308]: mismatched types
   --> /home/user/etc/.cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.12/src/symbolize/libbacktrace.rs:156:60
    |
156 |         STATE = bt::backtrace_create_state(ptr::null(), 0, error_cb,
    |                                                            ^^^^^^^^ expected enum `std::os::raw::c_void`, found enum `libc::c_void`
    |
    = note: expected type `extern "C" fn(*mut std::os::raw::c_void, *const i8, i32)`
               found type `extern "C" fn(*mut libc::c_void, *const i8, i32) {symbolize::libbacktrace::error_cb}`

error[E0308]: mismatched types
   --> /home/user/etc/.cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.12/src/symbolize/libbacktrace.rs:172:36
    |
172 |                                    pcinfo_cb, error_cb,
    |                                    ^^^^^^^^^ expected enum `std::os::raw::c_void`, found enum `libc::c_void`
    |
    = note: expected type `extern "C" fn(*mut std::os::raw::c_void, usize, *const i8, i32, *const i8) -> i32`
               found type `extern "C" fn(*mut libc::c_void, usize, *const i8, i32, *const i8) -> i32 {symbolize::libbacktrace::pcinfo_cb}`

   Compiling serde_ignored v0.0.4
error[E0308]: mismatched types
   --> /home/user/etc/.cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.12/src/symbolize/libbacktrace.rs:172:47
    |
172 |                                    pcinfo_cb, error_cb,
    |                                               ^^^^^^^^ expected enum `std::os::raw::c_void`, found enum `libc::c_void`
    |
    = note: expected type `extern "C" fn(*mut std::os::raw::c_void, *const i8, i32)`
               found type `extern "C" fn(*mut libc::c_void, *const i8, i32) {symbolize::libbacktrace::error_cb}`

error[E0308]: mismatched types
   --> /home/user/etc/.cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.12/src/symbolize/libbacktrace.rs:176:31
    |
176 |                               syminfo_cb, error_cb,
    |                               ^^^^^^^^^^ expected enum `std::os::raw::c_void`, found enum `libc::c_void`
    |
    = note: expected type `extern "C" fn(*mut std::os::raw::c_void, usize, *const i8, usize, usize)`
               found type `extern "C" fn(*mut libc::c_void, usize, *const i8, usize, usize) {symbolize::libbacktrace::syminfo_cb}`

error[E0308]: mismatched types
   --> /home/user/etc/.cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.12/src/symbolize/libbacktrace.rs:176:43
    |
176 |                               syminfo_cb, error_cb,
    |                                           ^^^^^^^^ expected enum `std::os::raw::c_void`, found enum `libc::c_void`
    |
    = note: expected type `extern "C" fn(*mut std::os::raw::c_void, *const i8, i32)`
               found type `extern "C" fn(*mut libc::c_void, *const i8, i32) {symbolize::libbacktrace::error_cb}`

error: aborting due to 5 previous errors

For more information about this error, try `rustc --explain E0308`.
error: Could not compile `backtrace`.
warning: build failed, waiting for other jobs to finish...
error: failed to compile `cargo-vendor v0.1.22`, intermediate artifacts can be found at `/tmp/cargo-installNZUMcS`

[flaviut]

Can be worked around using

From 2608928d88aa98d7684732fb1f6b36dfbd09993b Mon Sep 17 00:00:00 2001
From: Flaviu Tamas <tamasflaviu@gmail.com>
Date: Wed, 12 Dec 2018 14:47:57 -0500
Subject: [PATCH] Workaround breakage in backtrace v0.3.12

---
 build.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/build.sh b/build.sh
index bbb7770..c743a43 100755
--- a/build.sh
+++ b/build.sh
@@ -53,7 +53,7 @@ function install_toolchain() {
     fi
     if ! which cargo-vendor &>/dev/null; then
         echo 'Installing cargo-vendor...'
-        cargo install cargo-vendor
+        cargo install --version 0.1.15 cargo-vendor
     fi
     if ! platformio --version &>/dev/null; then
         echo 'Installing platformio...'
-- 
2.20.0

[emosenkis]

Do you understand what's going on here? Why is the newer version incompatible? Does it make sense to pin the repository to the older version or can we fix the script so it works with the newer version also?

[flaviut]

backtrace-rs released 0.3.12, which appears to be incompatible with certain versions of rustc: rust-lang/backtrace-rs#141

I think the right move would be to do nothing at this time. If people run into this issue, they will end up here where they can learn that

• rustc 1.30 and above work fine, or
• they can apply the patch that I posted above.