Change 'spawn' implementation to allow blocking within <active code>

1 files changed, 4 insertions, 4 deletions

diff --git a/lib/js/urweb.js b/lib/js/urweb.js
index 56066d26..1beb63c3 100644
--- a/lib/js/urweb.js
+++ b/lib/js/urweb.js
@@ -1297,7 +1297,7 @@ function redirect(s) {
 
 function rc(prefix, uri, parse, k, needsSig) {
     if (!maySuspend)
-        er("May not 'rpc' in 'code' for <active>");
+        er("May not 'rpc' in main thread of 'code' for <active>");
 
     uri = cat(prefix, uri);
     uri = flattenLocal(uri);
@@ -1478,7 +1478,7 @@ function listener() {
 
 function rv(chn, parse, k) {
     if (!maySuspend)
-        er("May not 'recv' in 'code' for <active>");
+        er("May not 'recv' in main thread of 'code' for <active>");
 
     if (chn == null)
         return;
@@ -1508,13 +1508,13 @@ function rv(chn, parse, k) {
 
 function sl(ms, k) {
     if (!maySuspend)
-        er("May not 'sleep' in 'code' for <active>");
+        er("May not 'sleep' in main thread of 'code' for <active>");
 
     window.setTimeout(function() { k(null); }, ms);
 }
 
 function sp(e) {
-    execF(e, null);
+    window.setTimeout(function() { execF(e); }, 0);
 }