Fix infinite recursion in NodeExpressionResolver when resolving self-referencing class constants

[Copilot]

Resolving a class constant whose value references the same class by explicit name (e.g. const RELATIVE = GlobalNamespaceClass::LITERAL) caused infinite recursion: each call to resolveExprClassConstFetch() created a new ReflectionClass instance with no constants cache, triggering collectSelfConstants() again indefinitely.

Root cause

fetchReflectionClass() always created new ReflectionClass($className) for FQN names, even when the context was already the same class mid-way through computing its constants. The new instance had no partial constants cache, so getConstants() re-entered collectSelfConstants() recursively.

Changes

• src/Resolver/NodeExpressionResolver.php

  • Added getContextClass() helper that extracts a \ReflectionClass from any supported context type (ReflectionClass, ReflectionMethod, ReflectionProperty, ReflectionClassConstant, ReflectionParameter)
  • In fetchReflectionClass(), before constructing a new ReflectionClass($className), check if the context class matches the requested name and return it directly — reusing the in-progress instance with its partially-populated constants cache

• tests/Stub/FileWithClasses55.php

  • Added ClassWithSelfReferencingConstant stub, picked up automatically by ReflectionClassConstantTest

class GlobalNamespaceClass
{
    const LITERAL = 1;
    const RELATIVE = GlobalNamespaceClass::LITERAL; // previously caused infinite recursion
}