Rust-GPU / Rust-GPU/rust-gpu

[Migrated] Panicking in a #[track_caller] function fails to compile

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Description

Issue automatically imported from old repo: https://github.com/EmbarkStudios/rust-gpu/issues/1058
Old labels: t: bug
Originally creatd by beepster4096 on 2023-05-03T02:22:13Z


Expected Behaviour

Successful compilation

Example & Steps To Reproduce
#![no_std]

#[track_caller]
fn panic() {
    panic!("owo")
}

#[spirv_std::spirv(fragment)]
pub fn main() {
    panic();
}

produces

error: function pointer types are not allowed
   --> 
C:\Users\DrMeepster\.rustup\toolchains\nightly-2023-03-04-x86_64-pc-windows-msvc\lib\rustlib\src\rust\library\core\src\fmt\mod.rs:401:5
    |
401 |     pub const fn new_v1(pieces: &'a [&'static str], args: &'a [ArgumentV1<'a>]) -> Arguments<'a> {
    |     ^
    |

error: cannot cast between pointer types
       from `*struct core::option::Option<&[core::fmt::rt::v1::Argument]> { *[struct core::fmt::rt::v1::Argument { position: u32, 
format: struct core::fmt::rt::v1::FormatSpec { precision: struct core::fmt::rt::v1::Count { u32, u32 }, width: struct 
core::fmt::rt::v1::Count { u32, u32 }, flags: u32, fill: u32, align: u8 } }], u32 }`
         to `**struct fn(&[&'static str], &[core::fmt::ArgumentV1<'_>]) -> core::fmt::Arguments<'_> 
{core::fmt::Arguments::<'_>::new_v1} {  }`
   --> 
C:\Users\DrMeepster\.rustup\toolchains\nightly-2023-03-04-x86_64-pc-windows-msvc\lib\rustlib\src\rust\library\core\src\fmt\mod.rs:405:34
    |
405 |         Arguments { pieces, fmt: None, args }
    |                                  ^
    |

error: cannot cast between pointer types
       from `*[struct &str { *[u8], u32 }; 1]`
         to `*[struct &str { *[u8], u32 }]`
  --> 
C:\Users\DrMeepster\.rustup\toolchains\nightly-2023-03-04-x86_64-pc-windows-msvc\lib\rustlib\src\rust\library\core\src\panic.rs:57:38
   |
57 |         $crate::panicking::panic_fmt($crate::const_format_args!($($t)+))
   |                                      ^
   |

error: cannot cast between pointer types
       from `*struct ! {  }`
         to `*[struct core::fmt::ArgumentV1<'_> { value: *struct core::fmt::Opaque {  }, formatter: *fn(*struct core::fmt::Opaque {  }, 
*struct core::fmt::Formatter<'_> { buf: struct &mut dyn core::fmt::Write { *struct dyn core::fmt::Write {  }, *[u32; 3] }, width: 
struct core::option::Option<usize> { u32, u32 }, precision: struct core::option::Option<usize> { u32, u32 }, flags: u32, fill: u32, 
align: u8 }) -> bool }]`
  --> 
C:\Users\DrMeepster\.rustup\toolchains\nightly-2023-03-04-x86_64-pc-windows-msvc\lib\rustlib\src\rust\library\core\src\panic.rs:57:38
   |
57 |         $crate::panicking::panic_fmt($crate::const_format_args!($($t)+))
   |                                      ^
   |

System Info

  • Rust: 1.69.0-nightly (44cfafe2f 2023-03-03)
  • OS: Windows 11 10.0.22621
  • GPU: NVIDIA GeForce RTX 3070 Laptop

Backtrace

Backtrace

error: function pointer types are not allowed
   --> 
C:\Users\DrMeepster\.rustup\toolchains\nightly-2023-03-04-x86_64-pc-windows-msvc\lib\rustlib\src\rust\library\core\src\fmt\mod.rs:401:5
    |
401 |     pub const fn new_v1(pieces: &'a [&'static str], args: &'a [ArgumentV1<'a>]) -> Arguments<'a> {
    |     ^
    |
    = note: used by `core::fmt::ArgumentV1<'_>`
    = note: used by unnamed global (%31)
    = note: used by unnamed global (%32)
    = note: used by `&[core::fmt::ArgumentV1<'_>]`
    = note: used by `core::fmt::Arguments<'_>`
note: used from within `gpu::panic`
   --> 
C:\Users\DrMeepster\.rustup\toolchains\nightly-2023-03-04-x86_64-pc-windows-msvc\lib\rustlib\src\rust\library\core\src\panic.rs:57:38
    |
57  |         $crate::panicking::panic_fmt($crate::const_format_args!($($t)+))
    |                                      ^
note: called by `gpu::main`
   --> gpu\src\lib.rs:10:5
    |
10  |     panic();
    |     ^
note: called by `main`
   --> gpu\src\lib.rs:8:1
    |
8   | #[spirv_std::spirv(fragment)]
    | ^

error: cannot cast between pointer types
       from `*struct core::option::Option<&[core::fmt::rt::v1::Argument]> { *[struct core::fmt::rt::v1::Argument { position: u32, 
format: struct core::fmt::rt::v1::FormatSpec { precision: struct core::fmt::rt::v1::Count { u32, u32 }, width: struct 
core::fmt::rt::v1::Count { u32, u32 }, flags: u32, fill: u32, align: u8 } }], u32 }`
         to `**struct fn(&[&'static str], &[core::fmt::ArgumentV1<'_>]) -> core::fmt::Arguments<'_> 
{core::fmt::Arguments::<'_>::new_v1} {  }`
   --> 
C:\Users\DrMeepster\.rustup\toolchains\nightly-2023-03-04-x86_64-pc-windows-msvc\lib\rustlib\src\rust\library\core\src\fmt\mod.rs:405:34
    |
405 |         Arguments { pieces, fmt: None, args }
    |                                  ^
    |
note: used from within `<core::fmt::Arguments>::new_v1`
   --> 
C:\Users\DrMeepster\.rustup\toolchains\nightly-2023-03-04-x86_64-pc-windows-msvc\lib\rustlib\src\rust\library\core\src\fmt\mod.rs:405:34
    |
405 |         Arguments { pieces, fmt: None, args }
    |                                  ^
note: called by `gpu::panic`
   --> 
C:\Users\DrMeepster\.rustup\toolchains\nightly-2023-03-04-x86_64-pc-windows-msvc\lib\rustlib\src\rust\library\core\src\panic.rs:57:38
    |
57  |         $crate::panicking::panic_fmt($crate::const_format_args!($($t)+))
    |                                      ^
note: called by `gpu::main`
   --> gpu\src\lib.rs:10:5
    |
10  |     panic();
    |     ^
note: called by `main`
   --> gpu\src\lib.rs:8:1
    |
8   | #[spirv_std::spirv(fragment)]
    | ^

error: cannot cast between pointer types
       from `*[struct &str { *[u8], u32 }; 1]`
         to `*[struct &str { *[u8], u32 }]`
  --> 
C:\Users\DrMeepster\.rustup\toolchains\nightly-2023-03-04-x86_64-pc-windows-msvc\lib\rustlib\src\rust\library\core\src\panic.rs:57:38
   |
57 |         $crate::panicking::panic_fmt($crate::const_format_args!($($t)+))
   |                                      ^
   |
note: used from within `gpu::panic`
  --> 
C:\Users\DrMeepster\.rustup\toolchains\nightly-2023-03-04-x86_64-pc-windows-msvc\lib\rustlib\src\rust\library\core\src\panic.rs:57:38
   |
57 |         $crate::panicking::panic_fmt($crate::const_format_args!($($t)+))
   |                                      ^
note: called by `gpu::main`
  --> gpu\src\lib.rs:10:5
   |
10 |     panic();
   |     ^
note: called by `main`
  --> gpu\src\lib.rs:8:1
   |
8  | #[spirv_std::spirv(fragment)]
   | ^

error: cannot cast between pointer types
       from `*struct ! {  }`
         to `*[struct core::fmt::ArgumentV1<'_> { value: *struct core::fmt::Opaque {  }, formatter: *fn(*struct core::fmt::Opaque {  }, 
*struct core::fmt::Formatter<'_> { buf: struct &mut dyn core::fmt::Write { *struct dyn core::fmt::Write {  }, *[u32; 3] }, width: 
struct core::option::Option<usize> { u32, u32 }, precision: struct core::option::Option<usize> { u32, u32 }, flags: u32, fill: u32, 
align: u8 }) -> bool }]`
  --> 
C:\Users\DrMeepster\.rustup\toolchains\nightly-2023-03-04-x86_64-pc-windows-msvc\lib\rustlib\src\rust\library\core\src\panic.rs:57:38
   |
57 |         $crate::panicking::panic_fmt($crate::const_format_args!($($t)+))
   |                                      ^
   |
note: used from within `gpu::panic`
  --> 
C:\Users\DrMeepster\.rustup\toolchains\nightly-2023-03-04-x86_64-pc-windows-msvc\lib\rustlib\src\rust\library\core\src\panic.rs:57:38
   |
57 |         $crate::panicking::panic_fmt($crate::const_format_args!($($t)+))
   |                                      ^
note: called by `gpu::main`
  --> gpu\src\lib.rs:10:5
   |
10 |     panic();
   |     ^
note: called by `main`
  --> gpu\src\lib.rs:8:1
   |
8  | #[spirv_std::spirv(fragment)]
   | ^

Guide de contribution

Ouvrir le guide de contribution

Par où commencer

  1. Lisez l'issue en entier, puis le guide de contribution du projet.
  2. Signalez en commentaire que vous la prenez — cela évite que deux personnes fassent le même travail.
  3. Forkez le dépôt et travaillez sur une branche.
  4. Ouvrez une pull request qui référence le numéro de l'issue.

Piste de recherche

Commencez par reproduire l’exemple dans gpu/src/lib.rs et comparez les diagnostics émis concernant #[track_caller], core::fmt::mod.rs et core::panic.rs. Suivez l’échec depuis le point d’entrée du fragment spirv jusqu’à la compilation ; c’est terminé lorsque l’exemple se compile correctement sans les erreurs de pointeur de fonction et de conversion de pointeur signalées.

Rédigé par le modèle d'indexation à partir du texte de l'issue.

Évaluation

Stack technique
rust
Domaine
compilers
Type d'issue
Bug
Difficulté
4/5
Temps estimé
3-5 jours
Activité
À l'abandon
Clarté
Plutôt claire
Accessibilité débutants
42/100

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