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

GuillaumeGomez · web-flow · commit 70cf4741f8e3 · 2021-09-11T14:18:44.000+02:00
Add help for E0463 Fixes rust-lang#87871. r? `@estebank`
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

Original file line number	Diff line number	Diff line change
`@@ -1095,6 +1095,11 @@ impl CrateError {`
`1095`	`1095`	`== Symbol::intern(&sess.opts.debugging_opts.profiler_runtime)`
`1096`	`1096`	`{`
`1097`	`1097`	`err.note(&"the compiler may have been built without the profiler runtime");`
	`1098`	`+ } else if crate_name.as_str().starts_with("rustc_") {`
	`1099`	`+ err.help(`
	`1100`	`+ "maybe you need to install the missing components with: \`
	`1101`	+ `rustup component add rust-src rustc-dev llvm-tools-preview`",
	`1102`	`+ );`
`1098`	`1103`	`}`
`1099`	`1104`	`err.span_label(span, "can't find crate");`
`1100`	`1105`	`err`