diff --git a/src/cargo/core/manifest.rs b/src/cargo/core/manifest.rs
index 75e1e38e86f..6784cee7f13 100644
--- a/src/cargo/core/manifest.rs
+++ b/src/cargo/core/manifest.rs
@@ -445,7 +445,11 @@ impl VirtualManifest {
 
 impl Target {
     fn with_path(src_path: PathBuf) -> Target {
-        assert!(src_path.is_absolute());
+        assert!(
+            src_path.is_absolute(),
+            "`{}` is not absolute",
+            src_path.display()
+        );
         Target {
             kind: TargetKind::Bin,
             name: String::new(),
diff --git a/src/cargo/util/toml/mod.rs b/src/cargo/util/toml/mod.rs
index 3aa4f587550..651928efdb4 100644
--- a/src/cargo/util/toml/mod.rs
+++ b/src/cargo/util/toml/mod.rs
@@ -14,7 +14,7 @@ use url::Url;
 
 use core::{GitReference, PackageIdSpec, Profiles, SourceId, WorkspaceConfig, WorkspaceRootConfig};
 use core::{Dependency, Manifest, PackageId, Summary, Target};
-use core::{EitherManifest, Edition, Feature, Features, VirtualManifest};
+use core::{Edition, EitherManifest, Feature, Features, VirtualManifest};
 use core::dependency::{Kind, Platform};
 use core::manifest::{LibKind, Lto, ManifestMetadata, Profile};
 use sources::CRATES_IO;