Occasional crash

[paul-lalonde]

Stack trace:
goroutine 363 [running]:
runtime/debug.Stack()
/usr/local/go/src/runtime/debug/stack.go:24 +0x65
runtime/debug.PrintStack()
/usr/local/go/src/runtime/debug/stack.go:16 +0x19
main.(*cmdParser).atnl(0xc000190340?)
/Users/flux/dev/edwood/edit.go:328 +0x9c
main.(*cmdParser).collecttext(0xc000190340)
/Users/flux/dev/edwood/edit.go:430 +0x166
main.(*cmdParser).parse(0xc000190340, 0x0)
/Users/flux/dev/edwood/edit.go:535 +0x579
main.(*cmdParser).parse(0xc000190340, 0x0)
/Users/flux/dev/edwood/edit.go:526 +0x6bf
main.editthread(0x6500000070?)
/Users/flux/dev/edwood/edit.go:155 +0x2b
created by main.editcmd
/Users/flux/dev/edwood/edit.go:229 +0x2fa
panic: runtime error: slice bounds out of range [9753:0]

Was in win, did a git command that pokes edwood via the E edit command, and poof. The file being opened was only 1628 characters, so that's likely not it. I do, however, have a Watch window going which refreshes furiously, all the time, and is the source of most of my crashes, I think.

[rjkroege]

There are a number of races when filesystem access is updating file.Buffer contents at the same time as edit operations happen. This trace doesn't seem to fit that though.