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go/analysis/internal/checker: don't clobber fact when codeFact fails

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`codeFact` returns `nil, err` on errors, which results in error messages like:

    panic: internal error: encoding of nil fact failed in [analyzer]

Though that and the stacktrace are often enough to identify the cause, the nil
hides the actual source of the problem.

Change-Id: Iddcdee386a5c64c6567d2727ebe7a77fe21927e9
GitHub-Last-Rev: 92163c2a5a631817319c992f7445f86d95130514
GitHub-Pull-Request: golang/tools#78
Reviewed-on: https://go-review.googlesource.com/c/tools/+/167997
Reviewed-by: Michael Matloob <matloob@golang.org>
Run-TryBot: Michael Matloob <matloob@golang.org>
This commit is contained in:
Steven L 2019-03-17 21:01:14 +00:00 committed by Michael Matloob
parent 43e94f7338
commit a94d7df2cb
1 changed files with 4 additions and 4 deletions
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8
go/analysis/internal/checker/checker.go
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@ -545,11 +545,11 @@ func inheritFacts(act, dep *action) {
// Optionally serialize/deserialize fact
// to verify that it works across address spaces.
if serialize {
var err error
fact, err = codeFact(fact)
encodedFact, err := codeFact(fact)
if err != nil {
log.Panicf("internal error: encoding of %T fact failed in %v", fact, act)
}
fact = encodedFact
}
if false {
@ -567,11 +567,11 @@ func inheritFacts(act, dep *action) {
// to verify that it works across address spaces
// and is deterministic.
if serialize {
var err error
fact, err = codeFact(fact)
encodedFact, err := codeFact(fact)
if err != nil {
log.Panicf("internal error: encoding of %T fact failed in %v", fact, act)
}
fact = encodedFact
}
if false {