stack trace line numbers are wrong with debug=false and compilerOptions="/debug:pdbonly"

Question

I'm using asp.net 3.5

In web.config, I have debug=false and compilerOptions="/debug:pdbonly" to compile with optimizations and still get line numbers in my stack traces. This works for the most part, but I had a bug in a function in my App_Code folder and the stack trace said the error was on a line that couldn't possibly be an error.

I played with my web.config settings a little bit and found that if I set debug=true and compilerOptions=pdbonly, the stack trace says the error is the line directly after the line with the bug. If I remove the compilerOptions=pdbonly, the stack trace reports the correct line as the error.

//the actual bug  (only reported when debug=true and no compiler options set)
var dt = new DateTime(-1,-1,-1);         

//
//...lots of non-buggy code between
//

//the bug according to the stack trace when 
//   debug=false and compilerOptions="/debug:pdbonly"
var ts = TimeSpan.Empty;

Is there a way to make this work right?

arcain · Accepted Answer · 2011-04-15 18:36:37Z

4

Compiler optimizations can affect the line numbering reported in the stack trace. You can set the compiler option /optimze- to disable them, then your stack trace line numbers should be correct.

For example: <compiler compilerOptions="/optimze- /debug:pdbonly"/>

edited Apr 15, 2011 at 18:36

answered Jan 10, 2011 at 21:00

arcain

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