Exception thrown in iOS when using .ContainsKey()

Hi

I'm using the following line of code to check if a key exists in a dictionary:

"if (eventTable.ContainsKey(eventType))"

This works in the editor on Mac, but on the iPad (ios 9) I get the following exception and crash:

"Key not found in dictionary".

This exception should be caught by the internal TryGetValue in .Net, but seems to be bubbling up past it and crashing iOS. This also only occurs if I have "Fast and No Exceptions" enabled in the build settings. Could this setting be stripping away how .Net/Mono catches this exception?

While I can work around the issue and just not use .ContainsKey, quite a few of the libraries and scripts I'm using make use of this so it's a bit of a pain to update them all.

Would this be considered a Unity bug or am I just using an unsupported feature?

Cheers.

 

A few questions:

1. Are you compiling using Mono or using IL2CPP ?
2. Are you absolutely sure the error comes from the line you pasted here? seems very unlikely to me..

 

1. IL2CPP
2. 99% certain - if I manually ensure the item exists in the dictionary before running .ContainsKey I don't get any iOS exceptions. If that check says the item doesn't exist and then (as a test) I run .ContainsKey anyway I get the exception. I could whip up a blank project with just this line and do a test - if it seems strange to you as well then maybe it is a bug and I'll upload it to the unity bug reports.

Cheers.