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Changed by [EMAIL PROTECTED] http://bugzilla.ximian.com/show_bug.cgi?id=75739 --- shadow/75739 2005-08-08 13:46:26.000000000 -0400 +++ shadow/75739.tmp.18423 2005-08-09 13:05:02.000000000 -0400 @@ -1,23 +1,23 @@ Bug#: 75739 -Product: Mono: Compilers +Product: Mono: Runtime Version: 1.1 OS: unknown OS Details: Status: NEW Resolution: Severity: Unknown Priority: Major -Component: Basic +Component: JIT AssignedTo: [EMAIL PROTECTED] ReportedBy: [EMAIL PROTECTED] QAContact: [EMAIL PROTECTED] TargetMilestone: --- URL: Cc: -Summary: on error resume next is ignored +Summary: [Runtime] Exception filtering at IL level is wrong (Was [VB]: on error resume next is ignored) Please fill in this template when reporting a bug, unless you know what you are doing. Description of Problem: @@ -145,6 +145,38 @@ if (num2 != 0) { ProjectData.ClearProjectError(); } } + +------- Additional Comments From [EMAIL PROTECTED] 2005-08-09 13:05 ------- +Well look at the attached disassembly of the original vbc-compiled +program (a bit complemented with console messages) to see what someone +pays for using the dreadly "On Error Resume [Next]" construct. +Oh, Horror!!! + +But to the point, this part pinpoints the problem +... +filter { + IL_002f: isinst [mscorlib]System.Exception +... + +This assumes the thrown exception is at the stack top upon entering +the filtering section, and Mono doesn't behave like that. As shown here: + +$ ilasm /exe ConsoleApplication4.il +Assembling 'ConsoleApplication4.il' , no listing file, to exe --> +'ConsoleApplication4.exe' + +Operation completed successfully +$ mono ConsoleApplication4.exe +Before 'Kill' +Entering filter - check Exception + +Unhandled Exception: System.NullReferenceException: Object reference +not set to an instance of an objectin <0x000a4> +ConsoleApplication4.Module1:Main () +$ echo "dummy" > fdddsfds +$ mono ConsoleApplication4.exe +Before 'Kill' +After 'Kill' _______________________________________________ mono-bugs maillist - [email protected] http://lists.ximian.com/mailman/listinfo/mono-bugs
