Why NULL Crashes Entire Programs (Null References Explained)
Tony Hoare invented null in 1965 and later called it his billion-dollar mistake. Today, null dereferences crash more programs than almost any other bug. Here is exactly why — and how modern languages are eliminating null at the type level.
In this video:
What a null pointer actually is (address `0x000000` in memory)
The exact CPU sequence that triggers a NullPointerException or segfault
Why silent null failures are often worse than immediate crashes
Why null checks do not scale in large codebases
How `Option T` makes null impossible to ignore at the type level
How Rust, Kotlin, Dart, and Swift remove null by design
Practical techniques to reduce null-related bugs in any language
No superstition. No defensive coding rituals. Just how null really breaks programs — and how modern type systems stop it.
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