Tinyjson compilation is not reproducible

[cameron-martin]

When compiling tinyjson, the hashes of the outputs differ between clean builds:

***************
*** 188019,188040 ****
    }
  }
  listed_outputs: "bazel-out/k8-opt-exec-CF7D65A3/bin/external/rules_rust_tinyjson/libtinyjson-4031717389.rlib"
  remotable: true
  cacheable: true
  progress_message: "Compiling Rust (without process_wrapper) rlib tinyjson (4 files) [for tool]"
  mnemonic: "Rustc"
  actual_outputs {
    path: "bazel-out/k8-opt-exec-CF7D65A3/bin/external/rules_rust_tinyjson/libtinyjson-4031717389.rlib"
    digest {
!     hash: "92a2c8e00550cc2e26a93d9e53beaa4a7b826d21c5112556eed9cb008435c88e"
!     size_bytes: 633710
      hash_function_name: "SHA-256"
    }
  }
  runner: "linux-sandbox"
  remote_cacheable: true
  target_label: "@rules_rust_tinyjson//:tinyjson"
  
  
  ---------------------------------------------------------
  
--- 188019,188040 ----
    }
  }
  listed_outputs: "bazel-out/k8-opt-exec-CF7D65A3/bin/external/rules_rust_tinyjson/libtinyjson-4031717389.rlib"
  remotable: true
  cacheable: true
  progress_message: "Compiling Rust (without process_wrapper) rlib tinyjson (4 files) [for tool]"
  mnemonic: "Rustc"
  actual_outputs {
    path: "bazel-out/k8-opt-exec-CF7D65A3/bin/external/rules_rust_tinyjson/libtinyjson-4031717389.rlib"
    digest {
!     hash: "3ea14e1e2f634961bfeb2d3ba2e9e690dd16c1991bd2a353583994b0098bd509"
!     size_bytes: 633702
      hash_function_name: "SHA-256"
    }
  }
  runner: "linux-sandbox"
  remote_cacheable: true
  target_label: "@rules_rust_tinyjson//:tinyjson"

I ran diffoscope on the output and this is the result: tj_diff.txt. It looks like the paths of files in the sandbox are being written to the library. This is similar to #1530, but this is using Linux (Ubuntu 22.04).

[UebelAndre]

This feels like a bug in the rust compiler. Have you been able to find any relevant issues in the rust-lang org?