diff options
Diffstat (limited to 'src/pkg/reflect/value.go')
| -rw-r--r-- | src/pkg/reflect/value.go | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/src/pkg/reflect/value.go b/src/pkg/reflect/value.go index f3f7d639a..79476ad22 100644 --- a/src/pkg/reflect/value.go +++ b/src/pkg/reflect/value.go @@ -54,6 +54,10 @@ func memmove(adst, asrc unsafe.Pointer, n uintptr) { // its String method returns "<invalid Value>", and all other methods panic. // Most functions and methods never return an invalid value. // If one does, its documentation states the conditions explicitly. +// +// A Value can be used concurrently by multiple goroutines provided that +// the underlying Go value can be used concurrently for the equivalent +// direct operations. type Value struct { // typ holds the type of the value represented by a Value. typ *commonType @@ -1628,6 +1632,15 @@ func MakeSlice(typ Type, len, cap int) Value { if typ.Kind() != Slice { panic("reflect.MakeSlice of non-slice type") } + if len < 0 { + panic("reflect.MakeSlice: negative len") + } + if cap < 0 { + panic("reflect.MakeSlice: negative cap") + } + if len > cap { + panic("reflect.MakeSlice: len > cap") + } // Declare slice so that gc can see the base pointer in it. var x []byte |