Hi, I'm confused by the stack trace when panic, and I have searched both in
history topics and google.
If I use panic, the stack is fine, code
is https://play.golang.org/p/Yb7fYW9ro3 , output is:
panic: Panic from user
goroutine 1 [running]:
main.causedPanic()
/tmp/sandbox078566511/main.go:11 +0x60
main.run()
/tmp/sandbox078566511/main.go:7 +0x20
main.main()
/tmp/sandbox078566511/main.go:4 +0x20
But if there is a runtime panic, the stack is completely unreadable, code
is https://play.golang.org/p/MHKPG5uFFn , output is:
panic: runtime error: invalid memory address or nil pointer dereference
goroutine 1 [running]:
main.main()
/tmp/sandbox277759147/main.go:4 +0x4
If I add a defer to the last function, the stack comes back, code is
https://play.golang.org/p/V7qDdyt_4Z , output is:
panic: runtime error: invalid memory address or nil pointer dereference
goroutine 1 [running]:
main.causedPanic()
/tmp/sandbox416089181/main.go:13 +0x48
main.run()
/tmp/sandbox416089181/main.go:7 +0x20
main.main()
/tmp/sandbox416089181/main.go:4 +0x20
Why it's diferent when there is a empty defer? It confused me.
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