Could not compile clap. process didn't exit successfully

[asmarcz]

Hi, I am a bit unsure where to put this issue as it happens when using tether crate but only bindgen is dependent on clap.

Rust Version

rustc 1.34.1 (fc50f328b 2019-04-24)

Affected Version of clap

2.33.0

Bug Summary

RSL won't start because it can't compile clap in VS Code extension.

Actual Behavior Summary

An Error is shown:

{
	"resource": "/home/asmar/projects/rust/tether_test/Cargo.toml",
	"owner": "rust",
	"severity": 8,
	"message": "Could not compile `clap`.\nprocess didn't exit successfully: `/home/asmar/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/bin/rls --crate-name clap /home/asmar/.cargo/registry/src/github.com-1ecc6299db9ec823/clap-2.33.0/src/lib.rs --color never --crate-type lib --emit=dep-info,link -C debuginfo=2 --cfg 'feature=\"ansi_term\"' --cfg 'feature=\"atty\"' --cfg 'feature=\"color\"' --cfg 'feature=\"default\"' --cfg 'feature=\"strsim\"' --cfg 'feature=\"suggestions\"' --cfg 'feature=\"vec_map\"' -C metadata=92f4b88ca94d45f6 -C extra-filename=-92f4b88ca94d45f6 --out-dir /home/asmar/projects/rust/tether_test/target/rls/debug/deps -L dependency=/home/asmar/projects/rust/tether_test/target/rls/debug/deps --extern ansi_term=/home/asmar/projects/rust/tether_test/target/rls/debug/deps/libansi_term-5d0ea3e7965a4619.rlib --extern atty=/home/asmar/projects/rust/tether_test/target/rls/debug/deps/libatty-b238ee1612164c59.rlib --extern bitflags=/home/asmar/projects/rust/tether_test/target/rls/debug/deps/libbitflags-1eecf389306a3c09.rlib --extern strsim=/home/asmar/projects/rust/tether_test/target/rls/debug/deps/libstrsim-9254da5d76dd790e.rlib --extern textwrap=/home/asmar/projects/rust/tether_test/target/rls/debug/deps/libtextwrap-bcb2e577ece43bfb.rlib --extern unicode_width=/home/asmar/projects/rust/tether_test/target/rls/debug/deps/libunicode_width-19d5b772cca570d6.rlib --extern vec_map=/home/asmar/projects/rust/tether_test/target/rls/debug/deps/libvec_map-fa11111d90438a74.rlib --cap-lints allow --error-format=json --sysroot /home/asmar/.rustup/toolchains/stable-x86_64-unknown-linux-gnu` (exit code: 101)",
	"startLineNumber": 1,
	"startColumn": 1,
	"endLineNumber": 10000,
	"endColumn": 1
}

Steps to Reproduce the issue

Open Cargo project that has tether="0.3.0" dependency with VS Code and Rust (rls) extension.

[mooreryan]

I ran into a similar issue. Posted it as an issue to rls here: rust-lang/rls#1454

[mooreryan]

For some reason rls fails to compile clap or things that depend on it. Interesting thing is that just compiling/running my program with cargo run will work, just not when VS Code tries to compile using rls.

[mati865]

It's not clap issue: rust-lang/rls#1449 (comment)

[mooreryan]

@mati865 is right. Try the fix in bitflags/bitflags#177, it worked for me.

[philipjkim]

How can I lock the version of bitflags, which is a dependency of clap? In my case, adding bitflags = "1.0.4" to Cargo.toml didn't work (Cargo.lock still contains bitflags 1.0.5, not 1.0.4). What worked for me is that I edited auto-generated Cargo.lock manually:

1. replacing all occurrences of bitflags version 1.0.5 to 1.0.4 and

2. replacing checksum value of bitflags 1.0.5to the value of 1.0.4. I found the checksum value here

   "checksum bitflags 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)" = "228047a76f468627ca71776ecdebd732a3423081fcf5125585bcd7c49886ce12"
   

[mooreryan]

Add this to your Cargo.toml

[dependencies]
bitflags = "=1.0.4"

Looks like you are missing the second = sign ("=1.0.4").