Bug 770 - Catnap LINQ Statements give JIT error
Summary: Catnap LINQ Statements give JIT error
Status: RESOLVED DUPLICATE of bug 587
Alias: None
Product: iOS
Classification: Xamarin
Component: Xamarin.iOS.dll ()
Version: 4.x
Hardware: Other Other
: --- major
Target Milestone: Untriaged
Assignee: Sebastien Pouliot
Depends on:
Reported: 2011-09-12 23:21 UTC by t9mike
Modified: 2011-09-13 09:20 UTC (History)
2 users (show)

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

Complete test solution (1.11 MB, application/x-gzip)
2011-09-12 23:21 UTC, t9mike

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Description t9mike 2011-09-12 23:21:48 UTC
Created attachment 336 [details]
Complete test solution

This is related to https://bugzilla.novell.com/show_bug.cgi?id=551623.

See attached sample project. The following code causes JIT compile error on device:

.Map(new ValuePropertyMap<Person, string>(x =>
.Map(new ValuePropertyMap<Person, string>(x =>
.Map(new ValuePropertyMap<Forum, string>(x => x.Name))
.Map(new ListPropertyMap<Forum, Post>(x => x.Posts, true)),
.Map(new ValuePropertyMap<Post, string>(x => x.Title))
.Map(new ValuePropertyMap<Post, string>(x => x.Body))
.Map(new BelongsToPropertyMap<Post, Person>(x => x.Poster,

The error I get is:

Attempting to JIT compile method
while running with --aot-only
at System.Linq.Expressions.Expression.Parameter(System.Type type,
System.String name)

This is with MonoTouch 4.2 and MonoDevelop 2.8.
Comment 1 Sebastien Pouliot 2011-09-13 09:20:25 UTC
If I set the project to "Link SDK assemblies" (which is the default* for device builds) then the problem disappear (but I had another exception later wrt to the sqlite database).

* you should always use "Link SDK assemblies" for device builds. It makes
smaller application and it makes the AOT compilation faster (faster enough so
you'll likely build faster when linking).

*** This bug has been marked as a duplicate of bug 587 ***