2 files changed, 10 insertions, 0 deletions
diff --git a/crates/ra_project_model/src/lib.rs b/crates/ra_project_model/src/lib.rs
index 77f729a25..55ff4d6ef 100644
--- a/crates/ra_project_model/src/lib.rs
+++ b/crates/ra_project_model/src/lib.rs
@@ -209,6 +209,7 @@ impl ProjectWorkspace {
                }
                let libcore = sysroot.core().and_then(|it| sysroot_crates.get(&it).copied());
+                let liballoc = sysroot.alloc().and_then(|it| sysroot_crates.get(&it).copied());
                let libstd = sysroot.std().and_then(|it| sysroot_crates.get(&it).copied());
                let libproc_macro =
                    sysroot.proc_macro().and_then(|it| sysroot_crates.get(&it).copied());
@@ -278,6 +279,11 @@ impl ProjectWorkspace {
                                log::error!("cyclic dependency on core for {}", pkg.name(&cargo))
                            }
                        }
+                        if let Some(alloc) = liballoc {
+                            if let Err(_) = crate_graph.add_dep(from, "alloc".into(), alloc) {
+                                log::error!("cyclic dependency on alloc for {}", pkg.name(&cargo))
+                            }
+                        }
                        if let Some(std) = libstd {
                            if let Err(_) = crate_graph.add_dep(from, "std".into(), std) {
                                log::error!("cyclic dependency on std for {}", pkg.name(&cargo))
diff --git a/crates/ra_project_model/src/sysroot.rs b/crates/ra_project_model/src/sysroot.rs
index 8a7757c41..10ca391b6 100644
--- a/crates/ra_project_model/src/sysroot.rs
+++ b/crates/ra_project_model/src/sysroot.rs
@@ -31,6 +31,10 @@ impl Sysroot {
        self.by_name("core")
    }
+    pub fn alloc(&self) -> Option<SysrootCrate> {
+        self.by_name("alloc")
+    }
    pub fn std(&self) -> Option<SysrootCrate> {
        self.by_name("std")
    }