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-rw-r--r--src/libsyntax/feature_gate/active.rs4
-rw-r--r--src/libsyntax/feature_gate/builtin_attrs.rs1
2 files changed, 5 insertions, 0 deletions
diff --git a/src/libsyntax/feature_gate/active.rs b/src/libsyntax/feature_gate/active.rs
index 19ef430318d..94f0995566f 100644
--- a/src/libsyntax/feature_gate/active.rs
+++ b/src/libsyntax/feature_gate/active.rs
@@ -525,6 +525,9 @@ declare_features! (
     // Allows the use of raw-dylibs (RFC 2627).
     (active, raw_dylib, "1.40.0", Some(58713), None),
 
+    /// Enable accurate caller location reporting during panic (RFC 2091).
+    (active, track_caller, "1.40.0", Some(47809), None),
+
     // -------------------------------------------------------------------------
     // feature-group-end: actual feature gates
     // -------------------------------------------------------------------------
@@ -540,4 +543,5 @@ pub const INCOMPLETE_FEATURES: &[Symbol] = &[
     sym::or_patterns,
     sym::let_chains,
     sym::raw_dylib,
+    sym::track_caller,
 ];
diff --git a/src/libsyntax/feature_gate/builtin_attrs.rs b/src/libsyntax/feature_gate/builtin_attrs.rs
index c12d0ce06ff..ae23cc5cb93 100644
--- a/src/libsyntax/feature_gate/builtin_attrs.rs
+++ b/src/libsyntax/feature_gate/builtin_attrs.rs
@@ -324,6 +324,7 @@ pub const BUILTIN_ATTRIBUTES: &[BuiltinAttribute] = &[
     ),
 
     gated!(ffi_returns_twice, Whitelisted, template!(Word), experimental!(ffi_returns_twice)),
+    gated!(track_caller, Whitelisted, template!(Word), experimental!(track_caller)),
 
     // ==========================================================================
     // Internal attributes: Stability, deprecation, and unsafe: