---

yaml
---
r: 6231
b: refs/heads/master
c: fc064f4
h: refs/heads/master
i:
  6229: c649060
  6227: fc4c6a7
  6223: 86c510f
v: v3

Author: nikomatsakis

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 711a3b066b311ccf8b989e4058cc6f041ab8dca7
+refs/heads/master: fc064f441026f2f34417925a26c1f6d73a7faf2c

trunk/src/rt/arch/x86_64/context.h

@@ -46,8 +46,8 @@ class context {
     // function being called causes the task to fail, then we have to avoid
     // leaking space on the C stack.
     inline void *alloc_stack(size_t nbytes) {
-        uint32_t bot = regs.data[RUSTRT_RSP];
-        uint32_t top = align_down(bot - nbytes);
+        uint64_t bot = regs.data[RUSTRT_RSP];
+        uint64_t top = align_down(bot - nbytes);
 
 #ifdef HAVE_VALGRIND
         (void)VALGRIND_MAKE_MEM_UNDEFINED(top - 4, bot - top + 4);