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, 3 insertions, 4 deletions

diff --git a/tests/error.lua b/tests/error.lua
index 28cfff1..76ceea4 100644
--- a/tests/error.lua
+++ b/tests/error.lua
@@ -173,8 +173,7 @@ local do_error_catching_test = function(error_reporting_mode_, error_value_, fin
     local h = start_lane(error_reporting_mode_, error_value_, finalizer_, finalizer_error_value_)

     local ret,err,stack= h:join()   -- wait for the lane (no automatic error propagation)

     WR("Processing results for {", error_reporting_mode_, error_value_, finalizer_, finalizer_error_value_, "}")

-    if err then

-        assert(ret == nil)

+    if ret == nil then

         assert(error_reporting_mode_ == "minimal" or type(stack)=="table") -- only true if lane was configured with error_trace_level ~= "minimal"

         if err == error_value_ then

             WR("Lane regular error: ", err)

@@ -198,8 +197,8 @@ local do_error_catching_test = function(error_reporting_mode_, error_value_, fin
             end

         end

     else -- no error

-        assert(ret == "success")

-        WR("No error in lane: ", ret)

+        assert(ret == true and err == "success")

+        WR("No error in lane: ", err, ret)

     end

     WR "TEST OK"

 end