Rollup merge of rust-lang#88830 - GuillaumeGomez:help-e0463, r=estebank

Add help for E0463 Fixes rust-lang#87871. r? ```@estebank```
rust-lang-ci · Sep 11, 2021 · 2cfafa6 · 2cfafa6
2 parents 5648859 + c9a56cd
commit 2cfafa6
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/compiler/rustc_metadata/src/locator.rs b/compiler/rustc_metadata/src/locator.rs
@@ -1095,6 +1095,11 @@ impl CrateError {
                         == Symbol::intern(&sess.opts.debugging_opts.profiler_runtime)
                     {
                         err.note(&"the compiler may have been built without the profiler runtime");
+                    } else if crate_name.as_str().starts_with("rustc_") {
+                        err.help(
+                            "maybe you need to install the missing components with: \
+                             `rustup component add rust-src rustc-dev llvm-tools-preview`",
+                        );
                     }
                     err.span_label(span, "can't find crate");
                     err