Struct failure_without_backtrace::Backtrace [−][src]
pub struct Backtrace { /* fields omitted */ }
A Backtrace
.
This is an opaque wrapper around the backtrace provided by libbacktrace. A variety of optimizations have been performed to avoid unnecessary or ill-advised work:
- If this crate is compiled in
no_std
compatible mode,Backtrace
is an empty struct, and will be completely compiled away. - If this crate is run without the
RUST_BACKTRACE
environmental variable enabled, the backtrace will not be generated at runtime. - Even if a backtrace is generated, the most expensive part of generating a backtrace is symbol resolution. This backtrace does not perform symbol resolution until it is actually read (e.g. by printing it). If the Backtrace is never used for anything, symbols never get resolved.
Even with these optimizations, including a backtrace in your failure
may not be appropriate to your use case. You are not required to put a
backtrace in a custom Fail
type.
(We have detected that this crate was documented with no_std compatibility turned on. The version of this crate that has been documented here will never generate a backtrace.)
Methods
impl Backtrace
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impl Backtrace
pub fn new() -> Backtrace
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pub fn new() -> Backtrace
Constructs a new backtrace. This will only create a real backtrace
if the crate is compiled in std mode and the RUST_BACKTRACE
environmental variable is activated.
(We have detected that this crate was documented with no_std compatibility turned on. The version of this crate that has been documented here will never generate a backtrace.)
Trait Implementations
impl Default for Backtrace
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impl Default for Backtrace
impl Debug for Backtrace
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impl Debug for Backtrace
fn fmt(&self, _: &mut Formatter) -> Result
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fn fmt(&self, _: &mut Formatter) -> Result
Formats the value using the given formatter. Read more
impl Display for Backtrace
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impl Display for Backtrace