Add feature gate test for --env flag

GuillaumeGomez · GuillaumeGomez · commit d2b1f94f05ca · 2023-12-10T14:25:57.000+01:00
diff --git a/tests/ui/feature-gates/env-flag.rs b/tests/ui/feature-gates/env-flag.rs
@@ -0,0 +1,3 @@
+// compile-flags: --env A=B
+
+fn main() {}
diff --git a/tests/ui/feature-gates/env-flag.stderr b/tests/ui/feature-gates/env-flag.stderr
@@ -0,0 +1,2 @@
+error: the `-Z unstable-options` flag must also be passed to enable the flag `env`
+

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,2 @@`
	`1`	+error: the `-Z unstable-options` flag must also be passed to enable the flag `env`
	`2`	`+`