This patch is based on a revert of upstream commit d85f44b217f36f8bef065fe95877eab98c52c2e5
adapted for use in the Debian package by Peter Michael Green.

Index: reqwest/src/async_impl/client.rs
===================================================================
--- reqwest.orig/src/async_impl/client.rs
+++ reqwest/src/async_impl/client.rs
@@ -532,9 +532,9 @@ impl ClientBuilder {
                     if config.tls_built_in_certs_native {
                         let mut valid_count = 0;
                         let mut invalid_count = 0;
-
-                        let load_results = rustls_native_certs::load_native_certs();
-                        for cert in load_results.certs {
+                        for cert in rustls_native_certs::load_native_certs()
+                            .map_err(crate::error::builder)?
+                        {
                             // Continue on parsing errors, as native stores often include ancient or syntactically
                             // invalid certificates, like root certificates without any X509 extensions.
                             // Inspiration: https://github.com/rustls/rustls/blob/633bf4ba9d9521a95f68766d04c22e2b01e68318/rustls/src/anchors.rs#L105-L112
@@ -547,21 +547,9 @@ impl ClientBuilder {
                             }
                         }
                         if valid_count == 0 && invalid_count > 0 {
-                            let err = if load_results.errors.is_empty() {
-                                crate::error::builder(
-                                    "zero valid certificates found in native root store",
-                                )
-                            } else {
-                                use std::fmt::Write as _;
-                                let mut acc = String::new();
-                                for err in load_results.errors {
-                                    let _ = writeln!(&mut acc, "{err}");
-                                }
-
-                                crate::error::builder(acc)
-                            };
-
-                            return Err(err);
+                            return Err(crate::error::builder(
+                                "zero valid certificates found in native root store",
+                            ));
                         }
                     }
 
Index: reqwest/Cargo.toml
===================================================================
--- reqwest.orig/Cargo.toml
+++ reqwest/Cargo.toml
@@ -471,7 +471,7 @@ optional = true
 default-features = false
 
 [target.'cfg(not(target_arch = "wasm32"))'.dependencies.rustls-native-certs]
-version = "0.8.0"
+version = "0.7.0"
 optional = true
 
 [target.'cfg(not(target_arch = "wasm32"))'.dependencies.rustls-pemfile]