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go/test/typecheck.go
Akshat Kumar 51e8fe5b1b cmd/gc: don't dereference a nil Type pointer in widstruct
The nil dereference in the next few lines doesn't seem
to cause a segmentation fault on Unix, but does seem
to halt the Go compiler.

The following is a test case:

>>>
package main

func mine(int b) int {
        return b + 2
}

func main() {
        mine()

        c = mine()
}
<<<

Without this change only the following is caught:

typecheck.go:3: undefined: b
typecheck.go:4: undefined: b

with it, we catch all the errors:

typecheck.go:3: undefined: b
typecheck.go:4: undefined: b
typecheck.go:10: undefined: c
typecheck.go:10: cannot assign to c .

R=rsc, minux.ma
CC=golang-dev
https://golang.org/cl/6542060
2012-10-07 14:11:59 +08:00

19 lines
347 B
Go

// errorcheck
// Verify that the Go compiler will not
// die after running into an undefined
// type in the argument list for a
// function.
// Does not compile.
package main
func mine(int b) int { // ERROR "undefined.*b"
return b + 2 // ERROR "undefined.*b"
}
func main() {
mine()
c = mine() // ERROR "undefined.*c" "cannot assign to c"
}