Add must-compile-successfully comment to appropriate ui tests.

Author: tommyip

src/test/ui/check_match/issue-43253.rs

@@ -8,6 +8,8 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+// must-compile-successfully
+
 #![feature(exclusive_range_pattern)]
 #![warn(unreachable_patterns)]
 

src/test/ui/codemap_tests/unicode_3.rs

@@ -8,6 +8,8 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+// must-compile-successfully
+
 fn main() {
     let s = "ZͨA͑ͦ͒͋ͤ͑̚L̄͑͋Ĝͨͥ̿͒̽̈́Oͥ͛ͭ!̏"; while true { break; }
     println!("{}", s);

src/test/ui/explain.rs

@@ -9,3 +9,4 @@
 // except according to those terms.
 
 // compile-flags: --explain E0591
+// must-compile-successfully

src/test/ui/hello_world/main.rs

@@ -8,6 +8,8 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+// must-compile-successfully
+
 // Test that compiling hello world succeeds with no output of any kind.
 
 fn main() {

src/test/ui/lint/command-line-lint-group-allow.rs

@@ -9,6 +9,7 @@
 // except according to those terms.
 
 // compile-flags: -A bad-style
+// must-compile-successfully
 
 fn main() {
     let _InappropriateCamelCasing = true;

src/test/ui/lint/command-line-lint-group-warn.rs

@@ -9,6 +9,7 @@
 // except according to those terms.
 
 // compile-flags: -W bad-style
+// must-compile-successfully
 
 fn main() {
     let _InappropriateCamelCasing = true;

src/test/ui/lint/not_found.rs

@@ -8,6 +8,8 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+// must-compile-successfully
+
 // this tests the `unknown_lint` lint, especially the suggestions
 
 // the suggestion only appears if a lint with the lowercase name exists

src/test/ui/lint/unreachable_pub-pub_crate.rs

@@ -14,6 +14,8 @@
 // suggestions to use `crate` given when it is on). When that feature becomes
 // stable, this test can be deleted.
 
+// must-compile-successfully
+
 #![feature(macro_vis_matcher)]
 
 #![allow(unused)]

src/test/ui/lint/unreachable_pub.rs

@@ -8,6 +8,8 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+// must-compile-successfully
+
 #![feature(crate_visibility_modifier)]
 #![feature(macro_vis_matcher)]
 

src/test/ui/lint/unused_parens_json_suggestion.rs

@@ -9,6 +9,7 @@
 // except according to those terms.
 
 // compile-flags: --error-format pretty-json -Zunstable-options
+// must-compile-successfully
 
 // The output for humans should just highlight the whole span without showing
 // the suggested replacement, but we also want to test that suggested