[#15711] Fix toArray() and unserialize() for typed PHP properties that are uninitialized

[niden]

Hello!

• Type: bug fix
• Link to issue: [BUG]: find and findFirst fails with exception from Phalcon\Mvc\Model->toArray if there is APCU model cache enabled #15711

In raising this pull request, I confirm the following:

• I have read and understood the Contributing Guidelines
• I have checked that another pull request for this purpose does not exist
• I wrote some tests for this PR
• I have updated the relevant CHANGELOG
• I have created a PR for the documentation about this change

Small description of change:

Root Cause

When a query result (e.g. from a LEFT JOIN with no matching row) returns NULL for a column that is NOT NULL in the database schema, cloneResultMap() deliberately skips the property assignment to avoid a TypeError. This leaves any typed non-nullable PHP property (e.g. public int $inv_id) uninitialized.

Two downstream failures then occur:

Bug 1 — toArray() with a getter

If the model defines a getter for the property (e.g. getInvId()), calling toArray() with the default useGetter = true invokes that getter, which reads the uninitialized typed property and throws:

Error: Typed property ... must not be accessed before initialization

This is the error reported in the issue stack trace (occurring during Apcu->set() on the first request).

Bug 2 — unserialize()

Because toArray() returns null for an uninitialized property (via the isset() fallback path), the serialised data stores inv_id => null. On the next request, unserialize() tries to assign that null back to public int $inv_id, throwing:

TypeError: Cannot assign null to property of type int

Fixes

• Model::toArray(): wrap the getter call in try/catch \Error so that accessing an uninitialized typed property through a getter returns null instead of propagating.
• Model::unserialize(): wrap each property assignment in try/catch \TypeError so that restoring a null value into a typed non-nullable property is silently skipped rather than crashing.

Thanks