Encoding.ASCII is trimmed in Android/iOS in .NET8

[devWR]

Description

When trimming is enabled I cannot retrieve ASCII Encoding object. It looks like it's removed from Environment variables. It's working when trimmiing is disabled. Sample attached:
Expected:

• Click button
• Button text will update with Encoding name (US-ASCII) and encoding object will be initiated
  Actual:
• Click button
• Button text updates with incorrect name: Globalization_cp_20127 and then crashes when trying to retrieve encoding object

I tried to include in Linker.xml:



but unfortunately it didn't help.

Steps to Reproduce

1. Create project in Maui (can be Android or iOS)
2. Enable trimming
3. Try to invoke: System.Text.Encoding.GetEncoding(System.Text.Encoding.ASCII.EncodingName, EncoderFallback.ExceptionFallback, DecoderFallback.ExceptionFallback.
4. Crash happens

Link to public reproduction project repository

https://github.com/devWR/maui_encodingissue

No response

Version with bug

8.0.3

Is this a regression from previous behavior?

Not sure, did not test other versions

Last version that worked well

Unknown/Other

Affected platforms

iOS, Android

Affected platform versions

Android 14/iOS15

Did you find any workaround?

No

Relevant log output

Encoding ASCII: Globalization_cp_20127
Argument_EncodingNotSupported, Globalization_cp_20127 Arg_ParamName_Name, name
System.ArgumentException: Argument_EncodingNotSupported, Globalization_cp_20127 Arg_ParamName_Name, name
   at System.Text.EncodingTable.InternalGetCodePageFromName(String )
   at System.Text.EncodingTable.GetCodePageFromName(String )
   at System.Text.Encoding.GetEncoding(String , EncoderFallback , DecoderFallback )

Tagging subscribers to this area: @dotnet/area-system-text-encoding
See info in area-owners.md if you want to be subscribed.

Issue Details

---

Description

When trimming is enabled I cannot retrieve ASCII Encoding object. It looks like it's removed from Environment variables. It's working when trimmiing is disabled. Sample attached:
Expected:

• Click button
• Button text will update with Encoding name (US-ASCII) and encoding object will be initiated
  Actual:
• Click button
• Button text updates with incorrect name: Globalization_cp_20127 and then crashes when trying to retrieve encoding object

I tried to include in Linker.xml:



but unfortunately it didn't help.

Steps to Reproduce

1. Create project in Maui (can be Android or iOS)
2. Enable trimming
3. Try to invoke: System.Text.Encoding.GetEncoding(System.Text.Encoding.ASCII.EncodingName, EncoderFallback.ExceptionFallback, DecoderFallback.ExceptionFallback.
4. Crash happens

Link to public reproduction project repository

https://github.com/devWR/maui_encodingissue

No response

Version with bug

8.0.3

Is this a regression from previous behavior?

Not sure, did not test other versions

Last version that worked well

Unknown/Other

Affected platforms

iOS, Android

Affected platform versions

Android 14/iOS15

Did you find any workaround?

No

Relevant log output

Encoding ASCII: Globalization_cp_20127
Argument_EncodingNotSupported, Globalization_cp_20127 Arg_ParamName_Name, name
System.ArgumentException: Argument_EncodingNotSupported, Globalization_cp_20127 Arg_ParamName_Name, name
   at System.Text.EncodingTable.InternalGetCodePageFromName(String )
   at System.Text.EncodingTable.GetCodePageFromName(String )
   at System.Text.Encoding.GetEncoding(String , EncoderFallback , DecoderFallback )

Author:	devWR
Assignees:	-
Labels:	area-System.Text.Encoding
Milestone:	-

Tagging subscribers to 'os-ios': @steveisok, @akoeplinger, @kotlarmilos
See info in area-owners.md if you want to be subscribed.

Issue Details

---

Description

When trimming is enabled I cannot retrieve ASCII Encoding object. It looks like it's removed from Environment variables. It's working when trimmiing is disabled. Sample attached:
Expected:

• Click button
• Button text will update with Encoding name (US-ASCII) and encoding object will be initiated
  Actual:
• Click button
• Button text updates with incorrect name: Globalization_cp_20127 and then crashes when trying to retrieve encoding object

I tried to include in Linker.xml:



but unfortunately it didn't help.

Steps to Reproduce

1. Create project in Maui (can be Android or iOS)
2. Enable trimming
3. Try to invoke: System.Text.Encoding.GetEncoding(System.Text.Encoding.ASCII.EncodingName, EncoderFallback.ExceptionFallback, DecoderFallback.ExceptionFallback.
4. Crash happens

Link to public reproduction project repository

https://github.com/devWR/maui_encodingissue

No response

Version with bug

8.0.3

Is this a regression from previous behavior?

Not sure, did not test other versions

Last version that worked well

Unknown/Other

Affected platforms

iOS, Android

Affected platform versions

Android 14/iOS15

Did you find any workaround?

No

Relevant log output

Encoding ASCII: Globalization_cp_20127
Argument_EncodingNotSupported, Globalization_cp_20127 Arg_ParamName_Name, name
System.ArgumentException: Argument_EncodingNotSupported, Globalization_cp_20127 Arg_ParamName_Name, name
   at System.Text.EncodingTable.InternalGetCodePageFromName(String )
   at System.Text.EncodingTable.GetCodePageFromName(String )
   at System.Text.Encoding.GetEncoding(String , EncoderFallback , DecoderFallback )

Author:	devWR
Assignees:	-
Labels:	area-System.Text.Encoding, os-android, untriaged, os-ios
Milestone:	-

Tagging subscribers to 'linkable-framework': @eerhardt, @vitek-karas, @LakshanF, @sbomer, @joperezr, @marek-safar
See info in area-owners.md if you want to be subscribed.

Issue Details

---

Description

When trimming is enabled I cannot retrieve ASCII Encoding object. It looks like it's removed from Environment variables. It's working when trimmiing is disabled. Sample attached:
Expected:

• Click button
• Button text will update with Encoding name (US-ASCII) and encoding object will be initiated
  Actual:
• Click button
• Button text updates with incorrect name: Globalization_cp_20127 and then crashes when trying to retrieve encoding object

I tried to include in Linker.xml:



but unfortunately it didn't help.

Steps to Reproduce

1. Create project in Maui (can be Android or iOS)
2. Enable trimming
3. Try to invoke: System.Text.Encoding.GetEncoding(System.Text.Encoding.ASCII.EncodingName, EncoderFallback.ExceptionFallback, DecoderFallback.ExceptionFallback.
4. Crash happens

Link to public reproduction project repository

https://github.com/devWR/maui_encodingissue

No response

Version with bug

8.0.3

Is this a regression from previous behavior?

Not sure, did not test other versions

Last version that worked well

Unknown/Other

Affected platforms

iOS, Android

Affected platform versions

Android 14/iOS15

Did you find any workaround?

No

Relevant log output

Encoding ASCII: Globalization_cp_20127
Argument_EncodingNotSupported, Globalization_cp_20127 Arg_ParamName_Name, name
System.ArgumentException: Argument_EncodingNotSupported, Globalization_cp_20127 Arg_ParamName_Name, name
   at System.Text.EncodingTable.InternalGetCodePageFromName(String )
   at System.Text.EncodingTable.GetCodePageFromName(String )
   at System.Text.Encoding.GetEncoding(String , EncoderFallback , DecoderFallback )

Author:	devWR
Assignees:	-
Labels:	os-android, untriaged, area-CoreLib-mono, linkable-framework, os-ios, trimming-for-aot
Milestone:	-

[jeffschwMSFT]

fyi, we are deprecating area-corelib-mono and replacing with specific areas paths