NestedPlaceholder are not recursively resolved if the fallback is a placeholder

[vip-delete]

Nested placeholder is not recursively resolved in case it has a default value of another placeholder.
It used to work in Spring 6.1.9

How to reproduce:

1. Navigate to the parser test:

   spring-framework/spring-core/src/test/java/org/springframework/util/PlaceholderParserTests.java

   Line 212 in 078d683

   Arguments.of("${p6}", "v1:v2:def"),

2. add one more line to test:

Arguments.of("${p6:${p1}}", "v1:v2:def"),

3. Expected value of ${p6:${p1}} is v1:v2:def, but actual is ${p1}:${p2}:${bogus:def} - the raw text value of p6.

How to fix:

1. Modify this line of NestedPlaceholderPart to recursively resolve the value

   spring-framework/spring-core/src/main/java/org/springframework/util/PlaceholderParser.java

   Line 498 in 078d683

   String value = resolutionContext.resolvePlaceholder(resolvedKey);

2. The recursive resolution code is already there at the following line but it is used in SimplePlaceholderPart only:

   spring-framework/spring-core/src/main/java/org/springframework/util/PlaceholderParser.java

   Line 446 in 078d683

   String resolvedValue = resolveToText(resolutionContext, this.key);

[snicoll]

Thanks for the report. Someone created a PR for this that we will review.

[snicoll]

@vip-delete thanks again for reporting the regression. This should be fixed in Spring Framework 6.2.1-SNAPSHOT available shortly from repo.spring.io/snapshot.