Duplicate outputs in compile message.

[zoumi]

Here is the compile error message:

cargo test
   Compiling zmrequest v0.1.0 (file:///H:/work/rust_projects/zmrequest)
error[E0499]: cannot borrow `self._cookies` as mutable more than once at a time
   --> src\cookiejar.rs:104:17
    |
98  |         match self._cookies.get_mut(host)
    |               ------------- first mutable borrow occurs here
...
104 |                 self._cookies.insert(host.to_owned(),m);
    |                 ^^^^^^^^^^^^^ second mutable borrow occurs here
105 |             }
106 |         }
    |         - first borrow ends here

error[E0499]: cannot borrow `self._cookies` as mutable more than once at a time
   --> src\cookiejar.rs:104:17
    |
98  |         match self._cookies.get_mut(host)
    |               ------------- first mutable borrow occurs here
...
104 |                 self._cookies.insert(host.to_owned(),m);
    |                 ^^^^^^^^^^^^^ second mutable borrow occurs here
105 |             }
106 |         }
    |         - first borrow ends here

error: aborting due to previous error

error: aborting due to previous error

If you want more information on this error, try using "rustc --explain If you want more information on this error, try using "rustc --explain E0499E0499"
"
error: Could not compile `zmrequest`.
warning: build failed, waiting for other jobs to finish...
error: Could not compile `zmrequest`.

To learn more, run the command again with --verbose.

Rust version:

rustup show
Default host: x86_64-pc-windows-gnu

installed toolchains
--------------------

nightly-i686-pc-windows-gnu (default)
nightly-i686-pc-windows-msvc

active toolchain
----------------

nightly-i686-pc-windows-gnu (default)
rustc 1.26.0-nightly (3eeb5a665 2018-03-01)

[matthiaskrgr]

Might be related: rust-lang/rust#48640

@zoumi when you run "cargo test --verbose", do these errors originate from 2 different rustc invocations?

[zoumi]

I think it's the same as : rust-lang/rust#48640

cargo test --verbose
       Fresh winapi-build v0.1.1
       .....
       Fresh reqwest v0.8.5
   Compiling zmrequest v0.1.0 (file:///H:/work/rust_projects/zmrequest)
     Running `rustc --crate-name zmrequest 'src\lib.rs' --emit=dep-info,link -C debuginfo=2 --test -C metadata=66f895199465c7e0 -C extra-filename=-66f895199465c7e0 --out-dir 'E:\rustdir\target\debug\deps' -C 'incremental=E:\rustdir\target\debug\incremental' -L 'dependency=E:\rustdir\target\debug\deps' --extern 'reqwest=E:\rustdir\target\debug\deps\libreqwest-e276a59afc70f516.rlib' --extern 'time=E:\rustdir\target\debug\deps\libtime-886cb4ae66b63b36.rlib' --extern 'serde=E:\rustdir\target\debug\deps\libserde-c5f4b337a26d7bf0.rlib' -L 'E:\mingw-w64\i686-5.3.0-posix-dwarf-rt_v4-rev0\mingw32\i686-w64-mingw32\lib' -L 'E:\rustdir\target\debug' -L 'native=E:\rustdir\registry\src\mirrors.ustc.edu.cn-27933024a10d4e91\winapi-i686-pc-windows-gnu-0.4.0\lib'`
     Running `rustc --crate-name zmrequest 'src\lib.rs' --crate-type lib --emit=dep-info,link -C debuginfo=2 -C metadata=a66701ba614f9949 -C extra-filename=-a66701ba614f9949 --out-dir 'E:\rustdir\target\debug\deps' -C 'incremental=E:\rustdir\target\debug\incremental' -L 'dependency=E:\rustdir\target\debug\deps' --extern 'reqwest=E:\rustdir\target\debug\deps\libreqwest-e276a59afc70f516.rlib' --extern 'time=E:\rustdir\target\debug\deps\libtime-886cb4ae66b63b36.rlib' --extern 'serde=E:\rustdir\target\debug\deps\libserde-c5f4b337a26d7bf0.rlib' -L 'E:\mingw-w64\i686-5.3.0-posix-dwarf-rt_v4-rev0\mingw32\i686-w64-mingw32\lib' -L 'E:\rustdir\target\debug' -L 'native=E:\rustdir\registry\src\mirrors.ustc.edu.cn-27933024a10d4e91\winapi-i686-pc-windows-gnu-0.4.0\lib'`
error[E0499]: cannot borrow `self._cookies` as mutable more than once at a time
   --> src\cookiejar.rs:104:17
    |
98  |         match self._cookies.get_mut(host)
    |               ------------- first mutable borrow occurs here
...
104 |                 self._cookies.insert(host.to_owned(),m);
    |                 ^^^^^^^^^^^^^ second mutable borrow occurs here
105 |             }
106 |         }
    |         - first borrow ends here

error[E0499]: cannot borrow `self._cookies` as mutable more than once at a time
   --> src\cookiejar.rs:104:17
    |
98  |         match self._cookies.get_mut(host)
    |               ------------- first mutable borrow occurs here
...
104 |                 self._cookies.insert(host.to_owned(),m);
    |                 ^^^^^^^^^^^^^ second mutable borrow occurs here
105 |             }
106 |         }
    |         - first borrow ends here

error: aborting due to previous error

error: aborting due to previous error

If you want more information on this error, try using "rustc --explain E0499"
If you want more information on this error, try using "rustc --explain E0499"
error: Could not compile `zmrequest`.

Caused by:
  process didn't exit successfully: `rustc --crate-name zmrequest src\lib.rs --crate-type lib --emit=dep-info,link -C debuginfo=2 -C metadata=a66701ba614f9949 -C extra-filename=-a66701ba614f9949 --out-dir E:\rustdir\target\debug\deps -C incremental=E:\rustdir\target\debug\incremental -L dependency=E:\rustdir\target\debug\deps --extern reqwest=E:\rustdir\target\debug\deps\libreqwest-e276a59afc70f516.rlib --extern time=E:\rustdir\target\debug\deps\libtime-886cb4ae66b63b36.rlib --extern serde=E:\rustdir\target\debug\deps\libserde-c5f4b337a26d7bf0.rlib -L E:\mingw-w64\i686-5.3.0-posix-dwarf-rt_v4-rev0\mingw32\i686-w64-mingw32\lib -L E:\rustdir\target\debug -L native=E:\rustdir\registry\src\mirrors.ustc.edu.cn-27933024a10d4e91\winapi-i686-pc-windows-gnu-0.4.0\lib` (exit code: 101)
warning: build failed, waiting for other jobs to finish...
error: Could not compile `zmrequest`.

Caused by:
  process didn't exit successfully: `rustc --crate-name zmrequest src\lib.rs --emit=dep-info,link -C debuginfo=2 --test -C metadata=66f895199465c7e0 -C extra-filename=-66f895199465c7e0 --out-dir E:\rustdir\target\debug\deps -C incremental=E:\rustdir\target\debug\incremental -L dependency=E:\rustdir\target\debug\deps --extern reqwest=E:\rustdir\target\debug\deps\libreqwest-e276a59afc70f516.rlib --extern time=E:\rustdir\target\debug\deps\libtime-886cb4ae66b63b36.rlib --extern serde=E:\rustdir\target\debug\deps\libserde-c5f4b337a26d7bf0.rlib -L E:\mingw-w64\i686-5.3.0-posix-dwarf-rt_v4-rev0\mingw32\i686-w64-mingw32\lib -L E:\rustdir\target\debug -L native=E:\rustdir\registry\src\mirrors.ustc.edu.cn-27933024a10d4e91\winapi-i686-pc-windows-gnu-0.4.0\lib` (exit code: 101)

[matthiaskrgr]

Maybe we should keep open the issue here? I guess this is rather a cargo issue than a rustc issue...

[alexcrichton]

There's a lot more info and linked issues from #1198, but this is unlikely to get fixed.

[timxor]

Getting the similar output on new macbook. Thread mentioned above is many years old. Anyone get this fixed?

[rsalmei]

Please, why is this unlikely to be fixed? Is it really the intended behavior?
The errors rust gives us are dense, we shouldn't have to interpret them twice.
It pollutes the view too much, and ruins user experience, at least mine.

There's lots of closed issues about this, it took me some time to find one still open, maybe this should get some attention.
Thank you.

December 2020
stable-x86_64-apple-darwin (default)
rustc 1.48.0 (7eac88abb 2020-11-16)

[ehuss]

Closing as this should be fixed by #9675.