message: FileBackedMmapHeap: don't use strerror for now (it internally calls malloc)
diff: @@ -90,13 +90,13 @@ public:
  int fd = mkstemp(buf);
  if (fd < 0) {
  - debug("mkstemp: %s\n", strerror(errno));
  + debug("mkstemp: %d\n", errno);
  abort();
  }
  int err = ftruncate(fd, sz);
  if (err != 0) {
  - debug("ftruncate: %s\n", strerror(errno));
  + debug("ftruncate: %d\n", errno);
  abort();
  }
  