diff --git a/src/mzscheme/gc2/newgc.c b/src/mzscheme/gc2/newgc.c
index 63c8163c91..679875c40a 100644
--- a/src/mzscheme/gc2/newgc.c
+++ b/src/mzscheme/gc2/newgc.c
@@ -726,6 +726,12 @@ void *GC_make_jit_nursery_page() {
   NewGC *gc = GC_get_GC();
   mpage *new_mpage;
 
+  if((gc->gen0.current_size + THREAD_LOCAL_PAGE_SIZE) >= gc->gen0.max_size) {
+    if (!gc->dumping_avoid_collection)
+      garbage_collect(gc, 0);
+  }
+  gc->gen0.current_size += THREAD_LOCAL_PAGE_SIZE;
+
   {
     new_mpage = gen0_create_new_nursery_mpage(gc, THREAD_LOCAL_PAGE_SIZE);
 
diff --git a/src/mzscheme/src/error.c b/src/mzscheme/src/error.c
index 0ba8526b9a..dd0e2ea92f 100644
--- a/src/mzscheme/src/error.c
+++ b/src/mzscheme/src/error.c
@@ -177,6 +177,7 @@ Scheme_Config *scheme_init_error_escape_proc(Scheme_Config *config)
   %c = unicode char
   %d = int
   %ld = long int
+  %lx = long int
   %o = int, octal
   %f = double
   %% = percent
@@ -333,9 +334,14 @@ static long sch_vsprintf(char *s, long maxlen, const char *msg, va_list args, ch
 	case 'l':
 	  {
 	    long d;
+            int as_hex;
+            as_hex = (msg[j] == 'x');
 	    j++;
 	    d = ints[ip++];
-	    sprintf(buf, "%ld", d);
+            if (as_hex)
+              sprintf(buf, "%lx", d);
+            else
+              sprintf(buf, "%ld", d);
 	    t = buf;
 	    tlen = strlen(t);
 	  }
diff --git a/src/mzscheme/src/future.c b/src/mzscheme/src/future.c
index bbd7887991..83db07dc8c 100644
--- a/src/mzscheme/src/future.c
+++ b/src/mzscheme/src/future.c
@@ -721,6 +721,7 @@ void *worker_thread_future_loop(void *arg)
   pthread_mutex_unlock(&g_future_queue_mutex);
 
   ft->threadid = pthread_self();
+  ft->thread_short_id = id;
 
   //Decrement the number of available pool threads 
   g_num_avail_threads--;
@@ -992,7 +993,8 @@ static void do_invoke_rtcall(future_t *future)
     }
 
     scheme_log(scheme_main_logger, SCHEME_LOG_DEBUG, 0,
-               "future: waiting for runtime at %f: %s",
+               "future: %d waiting for runtime at %f: %s",
+               (long)future->thread_short_id,
                future->time_of_request,
                src);
   }
diff --git a/src/mzscheme/src/future.h b/src/mzscheme/src/future.h
index 0d51b00c69..638a158eae 100644
--- a/src/mzscheme/src/future.h
+++ b/src/mzscheme/src/future.h
@@ -52,6 +52,7 @@ typedef struct future_t {
 
   int id;
   pthread_t threadid;
+  int thread_short_id;
   int status;
   int work_completed;
   pthread_cond_t *can_continue_cv;