Open Radar

 
Summary:
When changing a build setting Xcode does not update dependent Info.plist files.

Steps to Reproduce:
1. Create a simple Xcode project, for example an iOS single view app.
2. Create a new xcconfig file in the project.
3. Set the project configurations to be based on that xcconfig file.
4. Add a custom setting to that file, like MY_SETTING = foo
5. Add a custom key to the project's Info.plist file, like <key>foo</key><string>${MY_SETTING}</string>
6. Build and check the Info.plist file in the build product. The contained value will be "foo", as expected.
7. Change the xcconfig file to MY_SETTING = bar
8. Build again. The setting will not be updated to "bar"

Expected Results:
The Info.plist file should reflect the current build setting.

Actual Results:
The Info.plist file is not updated.

Notes:
This does not depend on a custom build setting, the same error occurs with built-in build settings.