Systems on aayushprime

recover() only works in the panicking goroutine

Fri, 14 Aug 2026 12:35:00 +0545

recover() is scoped to the goroutine that panicked. A deferred recover in main does nothing for a panic in a goroutine you spawned — that panic unwinds its own stack, finds no recover, and takes the whole process down.

Which is the correct default. A goroutine that panicked has no idea what invariants it broke on the way out, and a process that keeps serving after that is lying to its callers.

Pseudoterminals

Fri, 14 Aug 2026 12:00:00 +0545

A pty is a pair of character devices that pretend to be a terminal. The master end is held by whatever wants to drive a terminal; the slave end is what the child process opens as its controlling terminal, so the child believes it is talking to real hardware.

That belief is the whole point. It is why a shell spawned under a pty still does line editing, still reports a window size, still emits colour — none of which happens when you just pipe to it.

Why is my Golang server (not) crashing?

Tue, 03 Jun 2025 15:47:09 +0545

I was hit by one of these “you didn’t know this, now suffer” moments today. I was working on a websocket server and was gradually adding new functionality. Out of nowhere, the server started disconnecting the client. Without any error whatsoever. I even wasted some time thinking maybe the client was doing something wrong.

Then with no luck with anything I tried, I tried to use the debugger. The debugger would execute the last line of a function and then the client would disconnect. This is the exact function