GoKawiilDeveloper finds memory-corruption bug and compiler flaw in Infocom's Infidel
A developer analyzing Infocom's 1983 text adventure Infidel discovered a 'wild pointer' bug that corrupts memory, tracing it to a flaw in the game's original compiler. The bug, found using a memory-level debugger on the 1984 Macintosh release (and present in the original 1983 version too), affects how the game tracks objects left in its endless desert area.
GoKawiil's interpretation of the reporting above, not reported fact.
The find is a reminder that decades-old software can still yield previously undetected defects when examined with modern tooling, even in widely played commercial products. It also highlights that the bug originated in the development toolchain itself rather than the game code, suggesting the error could plausibly exist in other Infocom titles built with the same compiler.
- A wild pointer bug causing memory corruption was found in Infocom's Infidel.
- The bug stems from a flaw in the original ZIL compiler, not just the game logic.
- It was detected using a memory-level debugger, a tool unavailable to original players and testers.
Source: blog.zarfhome.com — Stephen Granade, 2026-10-03
Published there as: “Infidel Goes Wild”
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