fix(lsp): Ensure stdlib is always added before the check_crate phase

crates/nargo_cli/src/cli/mod.rs

@@ -184,7 +184,6 @@ mod tests {
             Box::new(acvm::pwg::default_is_opcode_supported(acvm::Language::R1CS)),
         );
         driver.create_local_crate(&root_file, CrateType::Binary);
-        crate::resolver::add_std_lib(&mut driver);
 
         let result = driver.check_crate(false);
         let success = result.is_ok();

crates/nargo_cli/src/resolver.rs

@@ -6,7 +6,7 @@ use std::{
 use acvm::{acir::circuit::Opcode, Language};
 use nargo::manifest::{Dependency, PackageManifest};
 use noirc_driver::Driver;
-use noirc_frontend::graph::{CrateId, CrateName, CrateType};
+use noirc_frontend::graph::{CrateId, CrateType};
 use thiserror::Error;
 
 use crate::{git::clone_git_repo, InvalidPackageError};
@@ -85,7 +85,6 @@ impl<'a> Resolver<'a> {
         let pkg_root = manifest_path.parent().expect("Every manifest path has a parent.");
         resolver.resolve_manifest(crate_id, manifest, pkg_root)?;
 
-        add_std_lib(&mut driver);
         Ok(driver)
     }
 
@@ -167,11 +166,3 @@ impl<'a> Resolver<'a> {
         }
     }
 }
-
-// This needs to be public to support the tests in `cli/mod.rs`.
-pub(crate) fn add_std_lib(driver: &mut Driver) {
-    let std_crate_name = "std";
-    let path_to_std_lib_file = PathBuf::from(std_crate_name).join("lib.nr");
-    let std_crate = driver.create_non_local_crate(path_to_std_lib_file, CrateType::Library);
-    driver.propagate_dep(std_crate, &CrateName::new(std_crate_name).unwrap());
-}

crates/noirc_driver/src/lib.rs

@@ -171,6 +171,15 @@ impl Driver {
     /// This returns a (possibly empty) vector of any warnings found on success.
     /// On error, this returns a non-empty vector of warnings and error messages, with at least one error.
     pub fn check_crate(&mut self, deny_warnings: bool) -> Result<Warnings, ErrorsAndWarnings> {
+        // Add the stdlib before we check the crate
+        // TODO: This should actually be done when constructing the driver and then propagated to each dependency when added;
+        // however, the `create_non_local_crate` panics if you add the stdlib as the first crate in the graph and other
+        // parts of the code expect the `0` FileID to be the crate root. See also #1681
+        let std_crate_name = "std";
+        let path_to_std_lib_file = PathBuf::from(std_crate_name).join("lib.nr");
+        let std_crate = self.create_non_local_crate(path_to_std_lib_file, CrateType::Library);
+        self.propagate_dep(std_crate, &CrateName::new(std_crate_name).unwrap());
+
         let mut errors = vec![];
         CrateDefMap::collect_defs(LOCAL_CRATE, &mut self.context, &mut errors);
 

crates/wasm/src/compile.rs

@@ -88,9 +88,6 @@ pub fn compile(args: JsValue) -> JsValue {
         add_noir_lib(&mut driver, dependency.as_str());
     }
 
-    // We are always adding std lib implicitly. It comes bundled with binary.
-    add_noir_lib(&mut driver, "std");
-
     driver.check_crate(false).expect("Crate check failed");
 
     if options.contracts {