fix: Fix target-data-layout fetching incorrectly passing 'rustc' to rustc

crates/base-db/src/fixture.rs

@@ -163,7 +163,10 @@ impl ChangeFixture {
                     Ok(Vec::new()),
                     false,
                     origin,
-                    meta.target_data_layout.as_deref().map(Arc::from),
+                    meta.target_data_layout
+                        .as_deref()
+                        .map(Arc::from)
+                        .ok_or_else(|| "target_data_layout unset".into()),
                 );
                 let prev = crates.insert(crate_name.clone(), crate_id);
                 assert!(prev.is_none());
@@ -200,7 +203,9 @@ impl ChangeFixture {
                 Ok(Vec::new()),
                 false,
                 CrateOrigin::CratesIo { repo: None, name: None },
-                default_target_data_layout.map(|x| x.into()),
+                default_target_data_layout
+                    .map(|x| x.into())
+                    .ok_or_else(|| "target_data_layout unset".into()),
             );
         } else {
             for (from, to, prelude) in crate_deps {
@@ -214,8 +219,10 @@ impl ChangeFixture {
                     .unwrap();
             }
         }
-        let target_layout =
-            crate_graph.iter().next().and_then(|it| crate_graph[it].target_layout.clone());
+        let target_layout = crate_graph.iter().next().map_or_else(
+            || Err("target_data_layout unset".into()),
+            |it| crate_graph[it].target_layout.clone(),
+        );
 
         if let Some(mini_core) = mini_core {
             let core_file = file_id;

crates/base-db/src/input.rs

@@ -243,6 +243,7 @@ pub enum ProcMacroExpansionError {
 }
 
 pub type ProcMacroLoadResult = Result<Vec<ProcMacro>, String>;
+pub type TargetLayoutLoadResult = Result<Arc<str>, Arc<str>>;
 
 #[derive(Debug, Clone)]
 pub struct ProcMacro {
@@ -265,7 +266,7 @@ pub struct CrateData {
     pub display_name: Option<CrateDisplayName>,
     pub cfg_options: CfgOptions,
     pub potential_cfg_options: CfgOptions,
-    pub target_layout: Option<Arc<str>>,
+    pub target_layout: TargetLayoutLoadResult,
     pub env: Env,
     pub dependencies: Vec<Dependency>,
     pub proc_macro: ProcMacroLoadResult,
@@ -324,7 +325,7 @@ impl CrateGraph {
         proc_macro: ProcMacroLoadResult,
         is_proc_macro: bool,
         origin: CrateOrigin,
-        target_layout: Option<Arc<str>>,
+        target_layout: Result<Arc<str>, Arc<str>>,
     ) -> CrateId {
         let data = CrateData {
             root_file_id,
@@ -647,7 +648,7 @@ mod tests {
             Ok(Vec::new()),
             false,
             CrateOrigin::CratesIo { repo: None, name: None },
-            None,
+            Err("".into()),
         );
         let crate2 = graph.add_crate_root(
             FileId(2u32),
@@ -660,7 +661,7 @@ mod tests {
             Ok(Vec::new()),
             false,
             CrateOrigin::CratesIo { repo: None, name: None },
-            None,
+            Err("".into()),
         );
         let crate3 = graph.add_crate_root(
             FileId(3u32),
@@ -673,7 +674,7 @@ mod tests {
             Ok(Vec::new()),
             false,
             CrateOrigin::CratesIo { repo: None, name: None },
-            None,
+            Err("".into()),
         );
         assert!(graph
             .add_dep(crate1, Dependency::new(CrateName::new("crate2").unwrap(), crate2))
@@ -700,7 +701,7 @@ mod tests {
             Ok(Vec::new()),
             false,
             CrateOrigin::CratesIo { repo: None, name: None },
-            None,
+            Err("".into()),
         );
         let crate2 = graph.add_crate_root(
             FileId(2u32),
@@ -713,7 +714,7 @@ mod tests {
             Ok(Vec::new()),
             false,
             CrateOrigin::CratesIo { repo: None, name: None },
-            None,
+            Err("".into()),
         );
         assert!(graph
             .add_dep(crate1, Dependency::new(CrateName::new("crate2").unwrap(), crate2))
@@ -737,7 +738,7 @@ mod tests {
             Ok(Vec::new()),
             false,
             CrateOrigin::CratesIo { repo: None, name: None },
-            None,
+            Err("".into()),
         );
         let crate2 = graph.add_crate_root(
             FileId(2u32),
@@ -750,7 +751,7 @@ mod tests {
             Ok(Vec::new()),
             false,
             CrateOrigin::CratesIo { repo: None, name: None },
-            None,
+            Err("".into()),
         );
         let crate3 = graph.add_crate_root(
             FileId(3u32),
@@ -763,7 +764,7 @@ mod tests {
             Ok(Vec::new()),
             false,
             CrateOrigin::CratesIo { repo: None, name: None },
-            None,
+            Err("".into()),
         );
         assert!(graph
             .add_dep(crate1, Dependency::new(CrateName::new("crate2").unwrap(), crate2))
@@ -787,7 +788,7 @@ mod tests {
             Ok(Vec::new()),
             false,
             CrateOrigin::CratesIo { repo: None, name: None },
-            None,
+            Err("".into()),
         );
         let crate2 = graph.add_crate_root(
             FileId(2u32),
@@ -800,7 +801,7 @@ mod tests {
             Ok(Vec::new()),
             false,
             CrateOrigin::CratesIo { repo: None, name: None },
-            None,
+            Err("".into()),
         );
         assert!(graph
             .add_dep(

crates/base-db/src/lib.rs

@@ -17,6 +17,7 @@ pub use crate::{
         CrateData, CrateDisplayName, CrateGraph, CrateId, CrateName, CrateOrigin, Dependency,
         Edition, Env, LangCrateOrigin, ProcMacro, ProcMacroExpander, ProcMacroExpansionError,
         ProcMacroId, ProcMacroKind, ProcMacroLoadResult, SourceRoot, SourceRootId,
+        TargetLayoutLoadResult,
     },
 };
 pub use salsa::{self, Cancelled};