x/tools/gopls: bug in analysis importer reported by telemetry

[adonovan]

This stack sbGdaw, hz09pg, zhKNnQ was reported by telemetry:

cache.(*analysisNode)._import.func1:41 is

		pkg, err := gcimporter.IImportShallow(an.fset, getPackages, an.summary.Export, string(an.m.PkgPath), bug.Reportf)
		if err != nil {
			an.typesErr = bug.Errorf("%s: invalid export data: %v", an.m, err)
			an.types = nil
		} else if pkg != an.types {
			log.Fatalf("%s: inconsistent packages", an.m)
		}

gopls/bug
golang.org/x/tools/gopls/internal/bug.report:35
golang.org/x/tools/gopls/internal/bug.Errorf:2
golang.org/x/tools/gopls/internal/lsp/cache.(*analysisNode)._import.func1:41
sync.(*Once).doSlow:5
sync.(*Once).Do:?65
golang.org/x/tools/gopls/internal/lsp/cache.(*analysisNode)._import:1
golang.org/x/tools/gopls/internal/lsp/cache.(*analysisNode).typeCheck.func2:34
golang.org/x/tools/gopls/internal/lsp/cache.importerFunc.Import:0
go/types.(*Checker).importPackage:28
go/types.(*Checker).collectObjects.func1:13
go/types.(*Checker).walkDecl:9
go/types.(*Checker).walkDecls:?391
go/types.(*Checker).collectObjects:42
go/types.(*Checker).checkFiles:32
go/types.(*Checker).Files:?341
golang.org/x/tools/gopls/internal/lsp/cache.(*analysisNode).typeCheck:117

golang.org/x/tools/gopls@v0.14.1 go1.21.3 linux/amd64 (1)

Reported using golang.org/x/tools/gopls/internal/telemetry/cmd/stacks.