Include capture clauses when generating metadata.

This may fix the bug that's blocking Issue #2441.

Author: eholk

src/librustsyntax/fold.rs

@@ -427,12 +427,17 @@ fn noop_fold_expr(e: expr_, fld: ast_fold) -> expr_ {
             expr_alt(fld.fold_expr(expr), vec::map(arms, fld.fold_arm), mode)
           }
           expr_fn(proto, decl, body, captures) {
-              expr_fn(proto, fold_fn_decl(decl, fld),
-                      fld.fold_block(body), captures)
+            expr_fn(proto, fold_fn_decl(decl, fld),
+                    fld.fold_block(body),
+                    @((*captures).map({|cap_item|
+                        @({id: fld.new_id((*cap_item).id)
+                           with *cap_item})})))
           }
           expr_fn_block(decl, body, captures) {
             expr_fn_block(fold_fn_decl(decl, fld), fld.fold_block(body),
-                          captures)
+                          @((*captures).map({|cap_item|
+                              @({id: fld.new_id((*cap_item).id)
+                                 with *cap_item})})))
           }
           expr_block(blk) { expr_block(fld.fold_block(blk)) }
           expr_move(el, er) {

src/rustc/middle/astencode.rs

@@ -252,7 +252,11 @@ fn visit_ids(item: ast::inlined_item, vfn: fn@(ast::node_id)) {
                 vfn(m.self_id);
                 vec::iter(tps) {|tp| vfn(tp.id)}
               }
-              visit::fk_anon(*) | visit::fk_fn_block(*) {
+              visit::fk_anon(_, capture_clause)
+              | visit::fk_fn_block(capture_clause) {
+                for vec::each(*capture_clause) {|clause|
+                    vfn(clause.id);
+                }
               }
             }
 

src/rustc/middle/capture.rs

@@ -67,6 +67,9 @@ fn compute_capture_vars(tcx: ty::ctxt,
     // first add entries for anything explicitly named in the cap clause
 
     for (*cap_clause).each { |cap_item|
+        #debug("Doing capture var: %s (%?)",
+               cap_item.name, cap_item.id);
+
         let cap_def = tcx.def_map.get(cap_item.id);
         let cap_def_id = ast_util::def_id_of_def(cap_def).node;
         if cap_item.is_move {

src/test/bench/graph500-bfs.rs

@@ -1,5 +1,3 @@
-// xfail-test :(
-
 /**
 
 An implementation of the Graph500 Bread First Search problem in Rust.
@@ -267,8 +265,7 @@ fn pbfs(graph: graph, key: node_id) -> bfs_result {
         }
     }
 
-    let graph_arc = arc::shared_arc(copy graph);
-    let graph = *graph_arc;
+    let (res, graph) = arc::shared_arc(copy graph);
 
     let mut i = 0u;
     while par::any(colors, is_gray) {
@@ -277,8 +274,7 @@ fn pbfs(graph: graph, key: node_id) -> bfs_result {
         i += 1u;
         let old_len = colors.len();
 
-        let colors_arc = arc::shared_arc(copy colors);
-        let color = *colors_arc;
+        let (res, color) = arc::shared_arc(copy colors);
 
         colors = par::mapi(colors) {|i, c|
             let c : color = c;