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-rw-r--r--src/bootstrap/lib.rs4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/bootstrap/lib.rs b/src/bootstrap/lib.rs
index 593d1c4ae88..0878b0ff789 100644
--- a/src/bootstrap/lib.rs
+++ b/src/bootstrap/lib.rs
@@ -1119,6 +1119,10 @@ impl Build {
             let krate = &self.crates[&krate];
             ret.push(krate);
             for dep in &krate.deps {
+                if !self.crates.contains_key(dep) {
+                    // Ignore non-workspace members.
+                    continue;
+                }
                 // Don't include optional deps if their features are not
                 // enabled. Ideally this would be computed from `cargo
                 // metadata --features …`, but that is somewhat slow. Just