structure the message

tshepang · tshepang · commit 842da5c1ae42 · 2025-04-03T01:43:06.000+02:00
diff --git a/compiler/rustc_session/src/config.rs b/compiler/rustc_session/src/config.rs
@@ -1423,10 +1423,12 @@ pub fn build_target_config(
             }
             target
         }
-        Err(e) => early_dcx.early_fatal(format!(
-            "error loading target specification: {e}; \
-                     run `rustc --print target-list` for a list of built-in targets"
-        )),
+        Err(e) => {
+            let mut err =
+                early_dcx.early_struct_fatal(format!("error loading target specification: {e}"));
+            err.help("run `rustc --print target-list` for a list of built-in targets");
+            err.emit();
+        }
     }
 }
 
diff --git a/tests/ui/errors/wrong-target-spec.stderr b/tests/ui/errors/wrong-target-spec.stderr
@@ -1,2 +1,4 @@
-error: error loading target specification: could not find specification for target "x86_64_unknown-linux-musl"; run `rustc --print target-list` for a list of built-in targets
+error: error loading target specification: could not find specification for target "x86_64_unknown-linux-musl"
+  |
+  = help: run `rustc --print target-list` for a list of built-in targets
 

Original file line number	Diff line number	Diff line change
`@@ -1423,10 +1423,12 @@ pub fn build_target_config(`
`1423`	`1423`	`}`
`1424`	`1424`	`target`
`1425`	`1425`	`}`
`1426`		`- Err(e) => early_dcx.early_fatal(format!(`
`1427`		`- "error loading target specification: {e}; \`
`1428`		- run `rustc --print target-list` for a list of built-in targets"
`1429`		`- )),`
	`1426`	`+ Err(e) => {`
	`1427`	`+ let mut err =`
	`1428`	`+ early_dcx.early_struct_fatal(format!("error loading target specification: {e}"));`
	`1429`	+ err.help("run `rustc --print target-list` for a list of built-in targets");
	`1430`	`+ err.emit();`
	`1431`	`+ }`
`1430`	`1432`	`}`
`1431`	`1433`	`}`
`1432`	`1434`