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-rw-r--r--util/async.lua6
1 files changed, 4 insertions, 2 deletions
diff --git a/util/async.lua b/util/async.lua
index 205db183..0dde1f32 100644
--- a/util/async.lua
+++ b/util/async.lua
@@ -24,8 +24,10 @@ local function runner_continue(thread)
-- Find the 'level' of the top-most function (0 == current level, 1 == caller, ...)
while debug.getinfo(thread, level, "") do level = level + 1; end
ok, runner = debug.getlocal(thread, level-1, 1);
- assert(ok == "self", "unexpected async state: variable mismatch");
- assert(runner.thread == thread, "unexpected async state: thread mismatch");
+ if ok ~= "self" or runner.thread ~= thread then
+ log("warn", "unexpected async state: unable to locate runner during error handling, got %s", ok);
+ return false;
+ end
local error_handler = runner.watchers.error;
if error_handler then error_handler(runner, debug.traceback(thread, err)); end
local ready_handler = runner.watchers.ready;