xamarin/Xamarin.Forms

[Bug] CarouselView: "Common Language Runtime detected an invalid program" when compiling

Open

#8,915 opened on Dec 16, 2019

View on GitHubContributor guide
 (2 comments) (0 reactions) (0 assignees)C# (1,926 forks)batch import
a/Xaml </>a/buildchaina/carouselviewe/8 :clock8:help wantedi/highinactivet/bug :bug:up-for-grabs

Repository metrics

Stars
 (5,644 stars)
PR merge metrics
 (No merged PRs in 30d)

Description

Description

If the ItemsSource of a CarouselView is set to an array of ContentViews in XAML, and one of the ContentViews contains a Button whose Clicked event handler property is set, then the compiler will fail with the error "Common Language Runtime detected an invalid program." Removing the event handler allows the project to build successfully.

This seems to be related to: https://github.com/alexrainman/CarouselView/issues/303

Steps to Reproduce

Build the attached solution (see below)

Expected Behavior

The solution should compile successfully.

Actual Behavior

The solution fails to compile with the error "Common Language Runtime detected an invalid program."

Basic Information

  • Version with issue: 4.4.0.991265

Reproduction Link

App1.zip

Contributor guide

Research direction
Investigate the XAML compilation pipeline for CarouselView, focusing on how event handlers are wired up in ItemsSource with ContentView arrays. Look for issues in the Xamarin.Forms XAML compiler that might generate invalid IL code.
Tech stack
csharp
Domain
mobile
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
4
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-2 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
C#Xamarin.Forms
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
50