From a3fae4424c3263cab0153baf135f4797904a7faa Mon Sep 17 00:00:00 2001
From: Cheese-Space <batumete1011@gmail.com>
Date: Sun, 29 Mar 2026 22:56:03 +0200
Subject: [PATCH 1/3] add enum and functions for setting backtrace visibility

---
 src/lib.rs | 44 +++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 43 insertions(+), 1 deletion(-)

diff --git a/src/lib.rs b/src/lib.rs
index 0b5f69f..87d47eb 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -650,7 +650,49 @@ pub trait Context<T, E>: context::private::Sealed {
 pub fn Ok<T>(value: T) -> Result<T> {
     Result::Ok(value)
 }
-
+#[cfg(feature = "std")]
+/// Enum for backtrace visibility.
+/// 
+/// See set_backtrace_visibility() for usage examples.  
+/// Note: BacktraceVisibility is not available in no_std.
+pub enum BacktraceVisibility {
+    /// Visible backtrace for panics and errors.
+    PanicAndError,
+    /// Only show backtrace for panics.
+    PanicOnly 
+}
+#[inline]
+#[cfg(feature = "std")]
+/// Sets backtrace visibility.
+/// 
+/// See BackTraceVisibility for more info.
+/// Note: set_backtrace_visibility is not available in no_std.   
+/// 
+/// # example  
+/// ```
+/// use anyhow::{bail, BacktraceVisibility::*, set_backtrace_visibility};  
+/// fn main() -> anyhow::Result<()> {  
+///     set_backtrace_visibility(PanicOnly);  
+///     bail!("you shall not see a backtrace!");  
+/// }
+/// ```
+pub fn set_backtrace_visibility(visibility: BacktraceVisibility) {
+    use std::env;
+    use crate::BacktraceVisibility::*;
+    match visibility {
+        PanicAndError => {
+            unsafe {
+                env::set_var("RUST_BACKTRACE", "1");
+            }
+        }
+        PanicOnly => {
+            unsafe {
+                env::set_var("RUST_BACKTRACE", "1");
+                env::set_var("RUST_LIB_BACKTRACE", "0");
+            }
+        }
+    }
+}
 // Not public API. Referenced by macro-generated code.
 #[doc(hidden)]
 pub mod __private {

From 56a61544741db6b7a1131e90ed5685550cbdc9bf Mon Sep 17 00:00:00 2001
From: Cheese_space <99285740+Cheese-Space@users.noreply.github.com>
Date: Mon, 30 Mar 2026 16:38:07 +0200
Subject: [PATCH 2/3] fix formatting so tests pass

---
 src/lib.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/lib.rs b/src/lib.rs
index 87d47eb..3a698c4 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -665,11 +665,11 @@ pub enum BacktraceVisibility {
 #[cfg(feature = "std")]
 /// Sets backtrace visibility.
 /// 
-/// See BackTraceVisibility for more info.
+/// See BackTraceVisibility for more info.  
 /// Note: set_backtrace_visibility is not available in no_std.   
 /// 
 /// # example  
-/// ```
+/// ``` no_run
 /// use anyhow::{bail, BacktraceVisibility::*, set_backtrace_visibility};  
 /// fn main() -> anyhow::Result<()> {  
 ///     set_backtrace_visibility(PanicOnly);  

From 180e54fe5f95a0840e6031a745a29d2f60ed952b Mon Sep 17 00:00:00 2001
From: Cheese_space <99285740+Cheese-Space@users.noreply.github.com>
Date: Mon, 30 Mar 2026 16:46:21 +0200
Subject: [PATCH 3/3] remove unused unsafe block

---
 src/lib.rs | 12 +++---------
 1 file changed, 3 insertions(+), 9 deletions(-)

diff --git a/src/lib.rs b/src/lib.rs
index 3a698c4..97dc9b6 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -680,16 +680,10 @@ pub fn set_backtrace_visibility(visibility: BacktraceVisibility) {
     use std::env;
     use crate::BacktraceVisibility::*;
     match visibility {
-        PanicAndError => {
-            unsafe {
-                env::set_var("RUST_BACKTRACE", "1");
-            }
-        }
+        PanicAndError => env::set_var("RUST_BACKTRACE", "1"),
         PanicOnly => {
-            unsafe {
-                env::set_var("RUST_BACKTRACE", "1");
-                env::set_var("RUST_LIB_BACKTRACE", "0");
-            }
+            env::set_var("RUST_BACKTRACE", "1");
+            env::set_var("RUST_LIB_BACKTRACE", "0");
         }
     }
 }