...
This error occurs because the BEGIN block is evaluated at the beginning of run timeruntime, before the @ISA statement can be evaluated. Therefore, when the Derived::new() constructor is invoked, the Derived class has an empty parents list , and therefore fails to invoke Base::new().
...
The base module establishes the inheritence hierarchy at parse time, before any runtime code, including the BEGIN block, is evaluated. Therefore, when the Derived::new() constructor is invoked, Perl knows that Derived is an instance of Base, and the program produces the correct output:
...
Recommendation | Severity | Likelihood | Remediation Cost | Priority | Level |
|---|---|---|---|---|---|
OBJ30-PL | low | unlikely | low | {*}P3 | L1 |
Automated Detection
Tool | Diagnostic |
|---|---|
Perl::Critic | ClassHierarchies::ProhibitExplicitISA |
...