x/tools/gopls: "file not found for pos = %d (%s)" crash in go/types #69338
Description
#!stacks
"runtime.gopanic" && "go/types.(*Checker).fileFor:+11"
This stack vD1W8g was reported by telemetry:
// fileFor returns the *ast.File which contains the position pos.
// If there are no files, the result is nil.
// The position must be valid.
func (check *Checker) fileFor(pos token.Pos) *ast.File {
assert(pos.IsValid())
// Eval and CheckExpr tests may not have any source files.
if len(check.files) == 0 {
return nil
}
for _, file := range check.files {
if file.FileStart <= pos && pos < file.FileEnd {
return file
}
}
panic(check.sprintf("file not found for pos = %d (%s)", int(pos), check.fset.Position(pos))) // <--- here
}The root cause is #69477 in go/types.
crash/crash
runtime.gopanic:+69
go/types.(*Checker).handleBailout:+7
go/types.(*Checker).Files.deferwrap1:+0
runtime.gopanic:+50
go/types.(*Checker).fileFor:+11
go/types.(*Checker).allowVersion:+3
go/types.(*Checker).genericExprList:+21
go/types.(*Checker).callExpr:+127
go/types.(*Checker).exprInternal:+357
go/types.(*Checker).rawExpr:+10
go/types.(*Checker).multiExpr:+2
go/types.(*Checker).assignVars:+31
go/types.(*Checker).stmt:+116
go/types.(*Checker).simpleStmt:=99
go/types.(*Checker).stmt:+210
go/types.(*Checker).stmtList:+9
go/types.(*Checker).funcBody:+23
golang.org/x/tools/gopls@v0.16.1 go1.23.0 linux/amd64 vscode (2)
Issue created by golang.org/x/tools/gopls/internal/telemetry/cmd/stacks.
Dups: vEHlHQ rRko4w ipCG3g X0G-gQ YALHSA NQ7Z2w kShApw Y2vk_g