---

yaml
---
r: 148961
b: refs/heads/try2
c: e5463b9
h: refs/heads/master
i:
  148959: b33d72e
v: v3

Author: sanxiyn

[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: 5109d1adcefa314e75493e8271826d08e2dffa62
+refs/heads/try2: e5463b996c84b34c6f7cb55a7e9e5cfdc29ca028
 refs/heads/dist-snap: ba4081a5a8573875fed17545846f6f6902c8ba8d
 refs/tags/release-0.2: c870d2dffb391e14efb05aa27898f1f6333a9596
 refs/tags/release-0.3: b5f0d0f648d9a6153664837026ba1be43d3e2503

branches/try2/src/librustc/driver/session.rs

@@ -96,7 +96,7 @@ pub fn debugging_opts_map() -> ~[(&'static str, &'static str, u64)] {
      ("no-landing-pads", "omit landing pads for unwinding",
       NO_LANDING_PADS),
      ("debug-llvm", "enable debug output from LLVM", DEBUG_LLVM),
-     ("show-span", "show spans", SHOW_SPAN),
+     ("show-span", "show spans for compiler debugging", SHOW_SPAN),
      ("count-type-sizes", "count the sizes of aggregate types",
       COUNT_TYPE_SIZES),
      ("meta-stats", "gather metadata statistics", META_STATS),

branches/try2/src/librustc/front/show_span.rs

@@ -8,6 +8,11 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+//! Span debugger
+//!
+//! This module shows spans for all expressions in the crate
+//! to help with compiler debugging.
+
 use syntax::ast;
 use syntax::visit;
 use syntax::visit::Visitor;