rustdoc: Mark --extern-private as unstable

ollie27 · ollie27 · commit 4fcb3384adaa · 2019-11-23T00:15:39.000Z
It's not even stable in rustc so it shouldn't be stable in rustdoc.
diff --git a/src/librustdoc/lib.rs b/src/librustdoc/lib.rs
@@ -144,7 +144,7 @@ fn opts() -> Vec<RustcOptGroup> {
         stable("extern", |o| {
             o.optmulti("", "extern", "pass an --extern to rustc", "NAME[=PATH]")
         }),
-        stable("extern-private", |o| {
+        unstable("extern-private", |o| {
             o.optmulti("", "extern-private",
                        "pass an --extern to rustc (compatibility only)", "NAME=PATH")
         }),
diff --git a/src/test/rustdoc/issue-66159.rs b/src/test/rustdoc/issue-66159.rs
@@ -1,4 +1,5 @@
 // aux-build:issue-66159-1.rs
+// compile-flags:-Z unstable-options
 // extern-private:issue_66159_1
 
 // The issue was an ICE which meant that we never actually generated the docs

Original file line number	Diff line number	Diff line change
`@@ -1,4 +1,5 @@`
`1`	`1`	`// aux-build:issue-66159-1.rs`
	`2`	`+// compile-flags:-Z unstable-options`
`2`	`3`	`// extern-private:issue_66159_1`
`3`	`4`
`4`	`5`	`// The issue was an ICE which meant that we never actually generated the docs`