Bump version placeholders to release

1 files changed, 1 insertions, 1 deletions

diff --git a/library/proc_macro/src/lib.rs b/library/proc_macro/src/lib.rs
index 8001fcff648..0d3fc2c5244 100644
--- a/library/proc_macro/src/lib.rs
+++ b/library/proc_macro/src/lib.rs
@@ -546,7 +546,7 @@ impl Span {
     /// Note: The observable result of a macro should only rely on the tokens and
     /// not on this source text. The result of this function is a best effort to
     /// be used for diagnostics only.
-    #[stable(feature = "proc_macro_source_text", since = "CURRENT_RUSTC_VERSION")]
+    #[stable(feature = "proc_macro_source_text", since = "1.66.0")]
     pub fn source_text(&self) -> Option<String> {
         self.0.source_text()
     }