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go/types: don't crash if there are no hints

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R=r
CC=golang-dev
https://golang.org/cl/7375060
This commit is contained in:
Robert Griesemer 2013-02-27 15:22:14 -08:00
parent 11776a39a1
commit 25c99300b9
1 changed files with 6 additions and 0 deletions
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6
src/pkg/go/types/expr.go
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@ -293,6 +293,11 @@ func (check *checker) convertUntyped(x *operand, target Type) {
// typed target
switch t := underlying(target).(type) {
case nil:
// We may reach here due to previous type errors.
// Be conservative and don't crash.
x.mode = invalid
return
case *Basic:
check.isRepresentable(x, t)
case *Interface:
@ -304,6 +309,7 @@ func (check *checker) convertUntyped(x *operand, target Type) {
goto Error
}
default:
check.dump("x = %v, target = %v", x, target) // leave for debugging
unreachable()
}