scopeguard | Rust crate for a convenient RAII scope guard
kandi X-RAY | scopeguard Summary
kandi X-RAY | scopeguard Summary
Rust crate for a convenient RAII scope guard.
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Trending Discussions on scopeguard
QUESTION
I'm trying to follow this tutorial on Windows with
...ANSWER
Answered 2022-Jan-09 at 14:02The behaviour of the panic!
macro changed a bit with the Rust 2021 edition, to make it more consistent with other format family macros. An entire chapter of the migration guide is dedicated to this.
The fix, and the link with the detailed information is also indicated in the error message you get:
QUESTION
I have the following code:
...ANSWER
Answered 2021-Sep-28 at 13:28Given the constraints, I'd go with the obvious solution, a RefCell
. It has a bad rap of being overused, but is actually designed for scenarios like this one. Using RefCell
without an Rc
is a good sign of doing it right.
RefCell
allows the guard to capture the value by shared reference, which leaves it available for your use:
QUESTION
Consider the following code that purposely causes a double panic:
...ANSWER
Answered 2021-Sep-26 at 01:13This behavior is intended.
From a comment by Jonas Schievink in Why does panicking in a Drop impl cause SIGILL?:
It calls
intrinsics::abort()
, which LLVM turns into aub2
instruction, which is illegal, thus SIGILL
I couldn't find any documentation for how double panics are handled, but a paragraph for std::intrinsics::abort()
lines up with this behavior:
The current implementation of
intrinsics::abort
is to invoke an invalid instruction, on most platforms. On Unix, the process will probably terminate with a signal likeSIGABRT
,SIGILL
,SIGTRAP
,SIGSEGV
orSIGBUS
. The precise behaviour is not guaranteed and not stable.
Curiously, this behavior is different from calling std::process::abort()
, which always terminates with SIGABRT
.
The illegal instruction of choice on x86 is UD2
(I think a typo in the comment above) a.k.a. an undefined instruction which is paradoxically reserved and documented to not be an instruction. So there is no corruption or invalid jump, just a quick and loud way to tell the OS that something has gone very wrong.
QUESTION
This code
...ANSWER
Answered 2021-Jun-30 at 15:32Seems like a bug, already reported and fixed for gcc: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66139
I suppose, std::shared_ptr<>
is partially created during exception throw
As a workaround, you could prevent copy elision:
QUESTION
When building my Rust lambda using cross
, I get this error:
ANSWER
Answered 2020-Nov-30 at 19:46Reqwest lists OpenSSL as a requirement on Linux due to it using native-tls
, which depends on openssl
. You need to install the pkg-config
and libssl-dev
packages:
QUESTION
Hi I'm trying to install fastapi, but it seems to be failing when im installing orjson
Here is the full error code:
...ANSWER
Answered 2020-Jun-15 at 05:22The problem is quite clear:
Your Rust target architecture (64-bit) does not match your python interpreter (32-bit)
Either upgrade your Python interpreter to 64 bit, or use rustup to install a 32 bit Rust target
Edit: Here is how you could manually target 32 bit on a x86_64 machine
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
Vulnerabilities
No vulnerabilities reported
Install scopeguard
Rust is installed and managed by the rustup tool. Rust has a 6-week rapid release process and supports a great number of platforms, so there are many builds of Rust available at any time. Please refer rust-lang.org for more information.
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