From fe9b292b11355af6b5f6e1d9247b88fa134657ed Mon Sep 17 00:00:00 2001 From: Rob Findley Date: Fri, 7 Mar 2025 18:13:51 +0000 Subject: [PATCH] go/types,types2: allocate the used* maps in initFiles As described in the associated comment, we need to reallocate usedVars and usedPkgNames in initFiles, as they are nilled out at the end of Checker.Files, which may be called multiple times. Fixes #72122 Change-Id: I9f6eb86e072d9d43a8720f6a5e86d827de6006a9 Reviewed-on: https://go-review.googlesource.com/c/go/+/655437 Auto-Submit: Robert Findley Reviewed-by: Robert Griesemer LUCI-TryBot-Result: Go LUCI Reviewed-by: Alan Donovan --- src/cmd/compile/internal/types2/check.go | 7 +++++++ src/go/types/check.go | 7 +++++++ 2 files changed, 14 insertions(+) diff --git a/src/cmd/compile/internal/types2/check.go b/src/cmd/compile/internal/types2/check.go index 68cfdb5d1e..43ad4ee67f 100644 --- a/src/cmd/compile/internal/types2/check.go +++ b/src/cmd/compile/internal/types2/check.go @@ -315,6 +315,13 @@ func (check *Checker) initFiles(files []*syntax.File) { check.objPath = nil check.cleaners = nil + // We must initialize usedVars and usedPkgNames both here and in NewChecker, + // because initFiles is not called in the CheckExpr or Eval codepaths, yet we + // want to free this memory at the end of Files ('used' predicates are + // only needed in the context of a given file). + check.usedVars = make(map[*Var]bool) + check.usedPkgNames = make(map[*PkgName]bool) + // determine package name and collect valid files pkg := check.pkg for _, file := range files { diff --git a/src/go/types/check.go b/src/go/types/check.go index eda0a58ad0..a60a1adfd9 100644 --- a/src/go/types/check.go +++ b/src/go/types/check.go @@ -339,6 +339,13 @@ func (check *Checker) initFiles(files []*ast.File) { check.objPath = nil check.cleaners = nil + // We must initialize usedVars and usedPkgNames both here and in NewChecker, + // because initFiles is not called in the CheckExpr or Eval codepaths, yet we + // want to free this memory at the end of Files ('used' predicates are + // only needed in the context of a given file). + check.usedVars = make(map[*Var]bool) + check.usedPkgNames = make(map[*PkgName]bool) + // determine package name and collect valid files pkg := check.pkg for _, file := range files { -- 2.50.0