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encoding/gob: catch internal error when it happens

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It was being skipped due to an oversight.
Also adjust naming parameters for map type construction - makes debugging easier.
Prelude to issue 3026.

R=golang-dev, dsymonds
CC=golang-dev
https://golang.org/cl/5674071
This commit is contained in:
Rob Pike 2012-02-17 07:07:53 +11:00
parent 3e7d804749
commit e574480ed1
1 changed files with 5 additions and 7 deletions
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12
src/pkg/encoding/gob/decode.go
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@ -464,7 +464,7 @@ func allocate(rtyp reflect.Type, p uintptr, indir int) uintptr {
// decodeSingle decodes a top-level value that is not a struct and stores it through p.
// Such values are preceded by a zero, making them have the memory layout of a
// struct field (although with an illegal field number).
func (dec *Decoder) decodeSingle(engine *decEngine, ut *userTypeInfo, basep uintptr) (err error) {
func (dec *Decoder) decodeSingle(engine *decEngine, ut *userTypeInfo, basep uintptr) {
state := dec.newDecoderState(&dec.buf)
state.fieldnum = singletonField
delta := int(state.decodeUint())
@ -473,7 +473,7 @@ func (dec *Decoder) decodeSingle(engine *decEngine, ut *userTypeInfo, basep uint
}
instr := &engine.instr[singletonField]
if instr.indir != ut.indir {
return errors.New("gob: internal error: inconsistent indirection")
errorf("gob: internal error: inconsistent indirection instr %d ut %d", instr.indir, ut.indir)
}
ptr := unsafe.Pointer(basep) // offset will be zero
if instr.indir > 1 {
@ -481,10 +481,9 @@ func (dec *Decoder) decodeSingle(engine *decEngine, ut *userTypeInfo, basep uint
}
instr.op(instr, state, ptr)
dec.freeDecoderState(state)
return nil
}
// decodeSingle decodes a top-level struct and stores it through p.
// decodeStruct decodes a top-level struct and stores it through p.
// Indir is for the value, not the type. At the time of the call it may
// differ from ut.indir, which was computed when the engine was built.
// This state cannot arise for decodeSingle, which is called directly
@ -839,11 +838,10 @@ func (dec *Decoder) decOpFor(wireId typeId, rt reflect.Type, name string, inProg
}
case reflect.Map:
name = "element of " + name
keyId := dec.wireType[wireId].MapT.Key
elemId := dec.wireType[wireId].MapT.Elem
keyOp, keyIndir := dec.decOpFor(keyId, t.Key(), name, inProgress)
elemOp, elemIndir := dec.decOpFor(elemId, t.Elem(), name, inProgress)
keyOp, keyIndir := dec.decOpFor(keyId, t.Key(), "key of "+name, inProgress)
elemOp, elemIndir := dec.decOpFor(elemId, t.Elem(), "element of "+name, inProgress)
ovfl := overflow(name)
op = func(i *decInstr, state *decoderState, p unsafe.Pointer) {
up := unsafe.Pointer(p)