From e97b36ab336440ddc641b23eaa84d49f70d0bc8c Mon Sep 17 00:00:00 2001
From: Bastian Kauschke <bastian_kauschke@hotmail.de>
Date: Mon, 4 May 2020 21:12:02 +0200
Subject: [PATCH] double negation

---
 src/cargo/util/toml/mod.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/cargo/util/toml/mod.rs b/src/cargo/util/toml/mod.rs
index b0295a7245e..77e0dbb8385 100644
--- a/src/cargo/util/toml/mod.rs
+++ b/src/cargo/util/toml/mod.rs
@@ -78,7 +78,7 @@ fn do_read_manifest(
         let (mut manifest, paths) =
             TomlManifest::to_real_manifest(&manifest, source_id, package_root, config)?;
         add_unused(manifest.warnings_mut());
-        if !manifest.targets().iter().any(|t| !t.is_custom_build()) {
+        if manifest.targets().iter().all(|t| t.is_custom_build()) {
             bail!(
                 "no targets specified in the manifest\n  \
                  either src/lib.rs, src/main.rs, a [lib] section, or \