Auto merge of #135754 - jieyouxu:rollup-j4q1hpr, r=jieyouxu

Rollup of 7 pull requests

Successful merges:

 - #135542 (Add the concrete syntax for precise capturing to 1.82 release notes.)
 - #135700 (Emit single privacy error for struct literal with multiple private fields and add test for `default_field_values` privacy)
 - #135722 (make it possible to use ci-rustc on tarball sources)
 - #135729 (Add debug assertions to compiler profile)
 - #135736 (rustdoc: Fix flaky doctest test)
 - #135738 (Replace usages of `map_or(bool, ...)` with `is_{some_and|none_or|ok_and}`)
 - #135747 (Rename FileName::QuoteExpansion to CfgSpec)

r? `@ghost`
`@rustbot` modify labels: rollup

1 files changed, 2 insertions, 1 deletions

diff --git a/compiler/rustc_errors/src/lib.rs b/compiler/rustc_errors/src/lib.rs
index cc5eb9c335e..549729548f5 100644
--- a/compiler/rustc_errors/src/lib.rs
+++ b/compiler/rustc_errors/src/lib.rs
@@ -35,6 +35,7 @@ use std::backtrace::{Backtrace, BacktraceStatus};
 use std::borrow::Cow;
 use std::cell::Cell;
 use std::error::Report;
+use std::ffi::OsStr;
 use std::hash::Hash;
 use std::io::Write;
 use std::num::NonZero;
@@ -1717,7 +1718,7 @@ impl DiagCtxtInner {
         let bugs: Vec<_> =
             std::mem::take(&mut self.delayed_bugs).into_iter().map(|(b, _)| b).collect();
 
-        let backtrace = std::env::var_os("RUST_BACKTRACE").map_or(true, |x| &x != "0");
+        let backtrace = std::env::var_os("RUST_BACKTRACE").as_deref() != Some(OsStr::new("0"));
         let decorate = backtrace || self.ice_file.is_none();
         let mut out = self
             .ice_file