---

yaml
---
r: 147271
b: refs/heads/try2
c: 9384de7
h: refs/heads/master
i:
  147269: 2cc3193
  147267: 21de848
  147263: b871e25
v: v3

Author: michaelwoerister

[refs]

@@ -5,7 +5,7 @@ refs/heads/snap-stage3: 78a7676898d9f80ab540c6df5d4c9ce35bb50463
 refs/heads/try: 519addf6277dbafccbb4159db4b710c37eaa2ec5
 refs/tags/release-0.1: 1f5c5126e96c79d22cb7862f75304136e204f105
 refs/heads/ndm: f3868061cd7988080c30d6d5bf352a5a5fe2460b
-refs/heads/try2: d35fff89944f583f4f96b384e3f5d075503e0d36
+refs/heads/try2: 9384de77bbc8edf5e7c7c1a84e79cd29588cdee9
 refs/heads/dist-snap: ba4081a5a8573875fed17545846f6f6902c8ba8d
 refs/tags/release-0.2: c870d2dffb391e14efb05aa27898f1f6333a9596
 refs/tags/release-0.3: b5f0d0f648d9a6153664837026ba1be43d3e2503

branches/try2/src/librustc/middle/trans/debuginfo.rs

@@ -690,6 +690,13 @@ pub fn create_function_debug_context(cx: &mut CrateContext,
 
     // Clang sets this parameter to the opening brace of the function's block, so let's do this too.
     let scope_line = span_start(cx, top_level_block.span).line;
+
+    // The is_local_to_unit flag indicates whether a function is local to the current compilation
+    // unit (i.e. if it is *static* in the C-sense). The *reachable* set should provide a good
+    // approximation of this, as it contains everything that might leak out of the current crate
+    // (by being externally visible or by being inlined into something externally visible). It might
+    // better to use the `exported_items` set from `driver::CrateAnalysis` in the future, but (atm)
+    // this set is not available in the translation pass.
     let is_local_to_unit = !cx.reachable.contains(&fn_ast_id);
 
     let fn_metadata = function_name.with_c_str(|function_name| {