Change lane:join() return values

* when no error is raised in the lane, lane:join() now precedes the lane returned values with true
* lane body is no longer forced to return something when used with join()
* adjusted all relevant unit tests accordingly

1 files changed, 9 insertions, 8 deletions

diff --git a/tests/basic.lua b/tests/basic.lua
index 9aaad97..f393175 100644
--- a/tests/basic.lua
+++ b/tests/basic.lua
@@ -507,19 +507,20 @@ local S = lanes.gen("table", { name = 'auto', gc_cb = gc_cb },
     return (unpack or table.unpack)(aux)
 end)
 
-h= S { 12, 13, 14 }     -- execution starts, h[1..3] will get the return values
+h = S { 12, 13, 14 }     -- execution starts, h[1..3] will get the return values
 -- wait a bit so that the lane has a chance to set its debug name
 SLEEP(0.5)
 print("joining with '" .. h:get_threadname() .. "'")
-local a,b,c,d= h:join()
+local r,a,b,c,d= h:join()
 if h.status == "error" then
-    print(h:get_threadname(), "error: " , a, b, c, d)
+    print(h:get_threadname(), "error: " , r, a, b, c, d)
 else
-    print(h:get_threadname(), a,b,c,d)
-    assert(a==14)
-    assert(b==13)
-    assert(c==12)
-    assert(d==nil)
+    print(h:get_threadname(), r,a,b,c,d)
+    assert(r == true)
+    assert(a == 14)
+    assert(b == 13)
+    assert(c == 12)
+    assert(d == nil)
 end
 
 local nameof_type, nameof_name = lanes.nameof(print)