[bug] [v2] Cargo assertion failure during consecutive Tauri builds

[fabiankachlock]

Describe the bug

I've just migrated my project to tauri v2 and cargo fails to build the project because of the following assertion mtimes.insert(output.clone(), mtime).is_none()

This only happens in consecutive builds. The first build after running cargo clean always works. The rebuild triggered by saving a file while tauri dev is running, fails the same way.

These errors occur on both windows & liunx with the same behavior.

Reproduction

You can find the project itself at https://github.com/fabiankachlock/zwoo
Follow these steps to reporduce:

• Clone the repo: git clone git@github.com:fabiankachlock/zwoo.git
• cd ./zwoo/frontend
• checkout the branch git checkout feat/ZWOO-458-migrate-tauri
• yarn (install frontend deps)
• yarn vite --mode tauri --port 8070 (start frontend)
• yarn tauri dev should work fine the first time, but running it a second time fails

Expected behavior

The project builds just fine even after consecutive calls to tauri dev/build or saving a file while tauri dev is active.

Full tauri info output

The windows machine:

[✔] Environment
    - OS: Windows 10.0.22631 X64
    ✔ WebView2: 123.0.2420.97
    ✔ MSVC: Visual Studio Community 2022
    ✔ rustc: 1.77.2 (25ef9e3d8 2024-04-09)
    ✔ cargo: 1.77.2 (e52e36006 2024-03-26)
    ✔ rustup: 1.27.0 (bbb9276d2 2024-03-08)
    ✔ Rust toolchain: stable-x86_64-pc-windows-msvc (environment override by RUSTUP_TOOLCHAIN)
    - node: 20.11.0
    - pnpm: 8.15.6
    - yarn: 1.22.19
    - npm: 10.2.4

[-] Packages
    - tauri [RUST]: 2.0.0-beta.15
    - tauri-build [RUST]: 2.0.0-beta.12
    - wry [RUST]: 0.39.1
    - tao [RUST]: 0.27.0
    - tauri-cli [RUST]: 2.0.0-beta.13
    - @tauri-apps/api [NPM]: 2.0.0-beta.8
    - @tauri-apps/cli [NPM]: 2.0.0-beta.13

[-] App
    - build-type: bundle
    - CSP: unset
    - frontendDist: ../dist-tmp
    - devUrl: http://localhost:8070/
    - framework: Vue.js
    - bundler: Rollup

The linux machine:

[✔] Environment
    - OS: Linux Rolling Release X64
    ✔ webkit2gtk-4.1: 2.44.1
    ✔ rsvg2: 2.58.0
    ✔ rustc: 1.77.2 (25ef9e3d8 2024-04-09)
    ✔ cargo: 1.77.2 (e52e36006 2024-03-26)
    ✔ rustup: 1.27.0 (2024-03-12)
    ✔ Rust toolchain: stable-x86_64-unknown-linux-gnu (default)
    - node: 20.11.1
    - pnpm: 8.15.6
    - yarn: 1.22.21
    - npm: 10.2.4

[-] Packages
    - tauri [RUST]: 2.0.0-beta.15
    - tauri-build [RUST]: 2.0.0-beta.12
    - wry [RUST]: 0.39.1
    - tao [RUST]: 0.27.0
    - tauri-cli [RUST]: 2.0.0-beta.10
    - @tauri-apps/api [NPM]: 2.0.0-beta.8
    - @tauri-apps/cli [NPM]: 2.0.0-beta.13

[-] App
    - build-type: bundle
    - CSP: unset
    - frontendDist: ../dist-tmp
    - devUrl: http://localhost:8070/
    - framework: Vue.js
    - bundler: Rollup

Stack trace

thread 'main' panicked at src/cargo\core\compiler\fingerprint\mod.rs:1111:13:
assertion failed: mtimes.insert(output.clone(), mtime).is_none()
stack backtrace:
   0:     0x7ff6f9a012d2 - git_midx_writer_dump
   1:     0x7ff6f9a2b85d - git_midx_writer_dump
   2:     0x7ff6f99fa661 - git_midx_writer_dump
   3:     0x7ff6f9a010fa - git_midx_writer_dump
   4:     0x7ff6f9a03f79 - git_midx_writer_dump
   5:     0x7ff6f9a03c35 - git_midx_writer_dump
   6:     0x7ff6f9a04494 - git_midx_writer_dump
   7:     0x7ff6f9a0432b - git_midx_writer_dump
   8:     0x7ff6f9a01bd9 - git_midx_writer_dump
   9:     0x7ff6f9a04036 - git_midx_writer_dump
  10:     0x7ff6f9ae0227 - git_midx_writer_dump
  11:     0x7ff6f9ae0302 - git_midx_writer_dump
  12:     0x7ff6f8d597f1 - git_filter_source_repo
  13:     0x7ff6f8d51ace - git_filter_source_repo
  14:     0x7ff6f8e10e79 - git_odb_object_id
  15:     0x7ff6f928b329 - git_filter_source_path
  16:     0x7ff6f8d52677 - git_filter_source_repo
  17:     0x7ff6f8d4d61a - git_filter_source_repo
  18:     0x7ff6f912d787 - git_filter_source_path
  19:     0x7ff6f920f770 - git_filter_source_path
  20:     0x7ff6f8b5a97d - git_filter_source_repo
  21:     0x7ff6f8b5a679 - git_filter_source_repo
  22:     0x7ff6f88e53cc - git_libgit2_prerelease
  23:     0x7ff6f89500c5 - git_filter_source_repo
  24:     0x7ff6f8947b2e - git_filter_source_repo
  25:     0x7ff6f892de06 - git_libgit2_prerelease
  26:     0x7ff6f894cb2c - git_filter_source_repo
  27:     0x7ff6f99f0622 - git_midx_writer_dump
  28:     0x7ff6f894ae5c - git_filter_source_repo
  29:     0x7ff6f9a344dc - git_midx_writer_dump
  30:     0x7fff8170257d - BaseThreadInitThunk
  31:     0x7fff8384aa48 - RtlUserThreadStart

Additional context

No response

[fabiankachlock]

After digging a bit more into the problem, it seems to be directly related to the following warning:

warning: output filename collision.
The lib target `zwoo_lib` in package `zwoo v1.0.0-beta.17 (C:\dev\csharp\zwoo\frontend\src-tauri)` has the same output filename as the lib target `zwoo_lib` in package `zwoo v1.0.0-beta.17 (C:\dev\csharp\zwoo\frontend\src-tauri)`.
Colliding filename is: C:\dev\csharp\zwoo\target\debug\deps\libzwoo_lib.rlib
The targets should have unique names.
Consider changing their names to be unique or compiling them separately.
This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.

Although I tried to ignore that warning, after removing lib from lib.crate-type it works just fine on both windows and linux.

After revisiting the docs, this is actually the intended configuration. Since I don't have a glue, how the extra crate type ended up there, I guess this issue can be closed.

[boris-schwarz]

Same for me, after removing lib from lib.crate-type it worked again.

I don't know how it ended up there, but my app stopped working right after I ran npm install @tauri-apps/api@next (it was missing, since I used the old way of extending an existing project instead of running npm create tauri-app@latest -- --beta, so I had only the cli installed).