a No exception b Uncaught exception Backtrace_deprecated.Error("b") Raised at file "backtrace_deprecated.ml", line 10, characters 21-32 Called from file "backtrace_deprecated.ml", line 10, characters 42-53 Called from file "backtrace_deprecated.ml", line 10, characters 42-53 Called from file "backtrace_deprecated.ml", line 10, characters 42-53 Called from file "backtrace_deprecated.ml", line 10, characters 42-53 Called from file "backtrace_deprecated.ml", line 10, characters 42-53 Called from file "backtrace_deprecated.ml", line 14, characters 4-11 Re-raised at file "backtrace_deprecated.ml", line 16, characters 68-71 Called from file "backtrace_deprecated.ml", line 21, characters 11-23 Uncaught exception Backtrace_deprecated.Error("c") Raised at file "backtrace_deprecated.ml", line 17, characters 26-37 Called from file "backtrace_deprecated.ml", line 21, characters 11-23 Uncaught exception Backtrace_deprecated.Error("d") Raised at file "backtrace_deprecated.ml", line 10, characters 21-32 Called from file "backtrace_deprecated.ml", line 10, characters 42-53 Called from file "backtrace_deprecated.ml", line 10, characters 42-53 Called from file "backtrace_deprecated.ml", line 10, characters 42-53 Called from file "backtrace_deprecated.ml", line 10, characters 42-53 Called from file "backtrace_deprecated.ml", line 10, characters 42-53 Called from file "backtrace_deprecated.ml", line 14, characters 4-11 Called from file "backtrace_deprecated.ml", line 21, characters 11-23 Uncaught exception Invalid_argument("index out of bounds") Raised by primitive operation at file "backtrace_deprecated.ml", line 21, characters 14-22