Why does this example C code run and yet SHOULD either not compile or give a segmentation fault?


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Originally Posted by Corona688
It's necessary sometimes, if you're building an operating system for example, to insert special instructions here and there without the compiler's interference. That's the kind of thing asm() is for. gcc will insert raw assembly if you ask, but you really have to know what you're doing since it can't protect you( though some more advanced syntax lets you warn gcc about side-effects instead). Plain, non-ASM goto (yes, it exists, very rarely used) wouldn't let you jump out of bounds.
As I have said in the distant past that I have coded assembly in 16 and 32 bit intel architecture but no experience in 64 bit, although I suspect there is not much difference.
And, I would only use it for mission critical stuff of which these days there is no need as HW interface APIs are usually far more than good enough for this purpose especially as the UNIX ethos is that everything is a file.

One thing for sure I am getting to know how gcc __thinks__ and compared to say Dice-C or VBCC for the AMIGA it is mega-powerful.
And finally I know that 'goto' is local to the function that uses it, and a good thing it is too.
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GO(1)							      General Commands Manual							     GO(1)

NAME
go - tool for managing Go source code SYNOPSIS
go command [arguments] DESCRIPTION
The Go distribution includes a command, named go, that automates the downloading, building, installation, and testing of Go packages and commands. COMMANDS
Each command is documented in its own manpage. For example, the build command is documented in go-build(1). The commands are: build compile packages and dependencies clean remove object files doc run godoc on package sources env print Go environment information fix run go tool fix on packages fmt run gofmt on package sources get download and install packages and dependencies install compile and install packages and dependencies list list packages run compile and run Go program test test packages tool run specified go tool version print Go version vet run go tool vet on packages EXAMPLES
TODO SEE ALSO
go-build(1), go-clean(1). AUTHOR
This manual page was written by Michael Stapelberg <stapelberg@debian.org>, for the Debian project (and may be used by others). 2012-05-13 GO(1)

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