Mcaster1Webmail crashed with what looked like classic heap corruption. The crash address spelled "cloud" in ASCII. The fix was `make clean`. Stale object files were linking against an old class layout.
The note
The crash
Mcaster1Webmail segfault on startup. Backtrace pointed at a class destructor. Pointer address: 0x64756f6c63 — looked random.
The "tell"
Decoded as ASCII: `c`,`l`,`o`,`u`,`d` → "cloud". The bytes were a string the layout-changed class had stomped because the destructor was reading the OLD class layout from old `.o` files.
Why incremental build betrayed me
Autotools `make` doesn't always detect that a header field reorder requires recompiling dependents. The .o files were built against the old layout; new code linked them in expecting the new layout. Half the program had a different idea of where the fields lived.
The fix
`make clean && make -j`. Bug gone. No refactor needed.
The lesson
When a C++ crash address looks like printable ASCII, decode it before debugging. The string usually points at the field that's being misread.