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master
test/fixedbugs/issue17318.go
47 строк
1 KB
Matthew Dempsky
cmd/compile: trim function name prefix from escape diagnostics
16 сен 2019, 18:30
16 сен 2019, 18:30
606019c
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// errorcheck -0 -N -m -l // Copyright 2016 The Go Authors. All rights reserved. // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. // The escape analyzer needs to run till its root set settles // (this is not that often, it turns out). // This test is likely to become stale because the leak depends // on a spurious-escape bug -- return an interface as a named // output parameter appears to cause the called closure to escape, // where returning it as a regular type does not. package main import ( "fmt" ) type closure func(i, j int) ent type ent int func (e ent) String() string { return fmt.Sprintf("%d", int(e)) // ERROR "... argument does not escape$" "int\(e\) escapes to heap$" } //go:noinline func foo(ops closure, j int) (err fmt.Stringer) { // ERROR "ops does not escape" enqueue := func(i int) fmt.Stringer { // ERROR "func literal does not escape" return ops(i, j) // ERROR "ops\(i, j\) escapes to heap$" } err = enqueue(4) if err != nil { return err } return // return result of enqueue, a fmt.Stringer } func main() { // 3 identical functions, to get different escape behavior. f := func(i, j int) ent { // ERROR "func literal does not escape" return ent(i + j) } i := foo(f, 3).(ent) fmt.Printf("foo(f,3)=%d\n", int(i)) // ERROR "int\(i\) escapes to heap$" "... argument does not escape$" }