Issue #20296 has been reported by MaxLap (Maxime Lapointe). ---------------------------------------- Bug #20296: Complex(:sym, exception: false) generate exception with weird timing https://bugs.ruby-lang.org/issues/20296 * Author: MaxLap (Maxime Lapointe) * Status: Open * Backport: 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN ---------------------------------------- Happens in Ruby 3.2.2, 3.2.3 and 3.3.0 (didn't test others). Add this to a file and execute it as-is: ``` 3.times { Complex(:sym, exception: false) } puts "hi" ``` The output will be: ``` $ ruby local2.rb hi local2.rb:1:in `Complex': can't convert Array into Complex (TypeError) 3.times { Complex([], exception: false) } ^^^^^^^^^^^^^^^^^^^^ from local2.rb:1:in `block in <main>' from local2.rb:1:in `times' from local2.rb:1:in `<main>' local2.rb:1:in `Complex': can't convert Array into Complex (TypeError) 3.times { Complex([], exception: false) } ^^^^^^^^^^^^^^^^^^^^ from local2.rb:1:in `block in <main>' from local2.rb:1:in `times' from local2.rb:1:in `<main>' local2.rb:1:in `Complex': can't convert Array into Complex (TypeError) 3.times { Complex([], exception: false) } ^^^^^^^^^^^^^^^^^^^^ from local2.rb:1:in `block in <main>' from local2.rb:1:in `times' from local2.rb:1:in `<main>' ``` So the exception is still reported (instead of being swallow), but the puts, which is after, had the time to execute first. I can even put a `sleep()` in between and the exceptions are still reported after the puts. In a IRB, there is no exception at all and everything seems to work as expected. Happens if I pass in an Array too. Doesn't seem to happen with bad strings. There is also a quadratic behavior somewhere in there. Running the code in an IRB (which doesn't show exceptions), if you double the number of `times` in the loop, it takes 4x as long. This is probably related... -- https://bugs.ruby-lang.org/