Bug 40519 - symbolication breaks with generic types
Summary: symbolication breaks with generic types
Status: NEW
Alias: None
Product: Tools
Classification: Mono
Component: other ()
Version: unspecified
Hardware: PC Mac OS
: --- normal
Target Milestone: ---
Assignee: marcos.henrich
URL:
Depends on:
Blocks:
 
Reported: 2016-04-19 13:29 UTC by Marek Safar
Modified: 2016-04-19 13:29 UTC (History)
1 user (show)

Tags:
Is this bug a regression?: ---
Last known good build:

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Status:
NEW

Description Marek Safar 2016-04-19 13:29:29 UTC
Simple example

using System;
using System.Collections.Generic;

public class M
{
	public void Foo (List<int> arg)
	{
	}	

	public void Foo (List<string> arg)
	{
		int.Parse ("adfa");
	}
}

class X
{
	public static void Main ()
	{
		var m = new M ();
		m.Foo (null as List<string>);
	}
}


The non-aot stacktrace looks like

System.FormatException: Input string was not in a correct format.
  at System.Number.StringToNumber (System.String str, System.Globalization.NumberStyles options, System.Number+NumberBuffer& number, System.Globalization.NumberFormatInfo info, System.Boolean parseDecimal) <0x1ce4bf0 + 0x00124> in <filename unknown>:0 
  at System.Number.ParseInt32 (System.String s, System.Globalization.NumberStyles style, System.Globalization.NumberFormatInfo info) <0x1ce3870 + 0x000ec> in <filename unknown>:0 
  at System.Int32.Parse (System.String s) <0x1cb1200 + 0x0002e> in <filename unknown>:0 
  at M.Foo (System.Collections.Generic.List`1[T] arg) [0x00001] in <filename unknown>:0 
  at X.Main () [0x0000b] in <filename unknown>:0 


The important part is

"  at M.Foo (System.Collections.Generic.List`1[T] arg) [0x00001] in <filename unknown>:0 "

which has List`1[T] which is not enough to determine correct overload.

Note: When I was looking into it I noticed we expand the generic argument in complex cases only, e.g. IEnumerable<int[,,,][]> which is probably different bug.