Maybe the object itself has circular references - so it fails at the first level.
> On Jul 21, 2021, at 11:25 AM, Brian Candler <b.cand...@pobox.com> wrote: > > I had a brief look at the code and it doesn't appear to do that. As far as > I can see, it indents as it goes: where you start is the "top" level, and it > increases the indentation for each level of children. > > The individual dump functions write directly to the writer, not to a buffer > (except when an object has a custom dumper, which means it has a "LitterDump" > method, in which case the output of LitterDump *is* buffered and realigned) > >> On Wednesday, 21 July 2021 at 17:17:57 UTC+1 ren...@ix.netcom.com wrote: >> If it is pretty printing it may need to determine the lowest level for >> indentation - so a depth first search - causing the entire tree to be >> traversed and retained before it can output anything. >> >>>> On Jul 21, 2021, at 9:40 AM, Brian Candler <b.ca...@pobox.com> wrote: >>>> >>> But AFAICT, it should generate output as it runs. The fact that it >>> doesn't generate any output at all is suspicious. >> >>> >>> >>>> On Wednesday, 21 July 2021 at 13:50:37 UTC+1 ren...@ix.netcom.com wrote: >>>> Since litter checks for circular references it needs to keep a ref to >>>> every object it sees. >>>> >>>> With a large tree you will run out of memory. >>>> >>>>>> On Jul 21, 2021, at 7:19 AM, jake...@gmail.com <jake...@gmail.com> wrote: >>>>>> >>>>> >>>> >>>>> The first thing I would do is remove the call to litter, and see if that >>>>> solved the issue. That would tell you immediately if the problem was the >>>>> litter package or the packages package. I have so specific knowledge, but >>>>> it is not impossible to imagine that you are simply trying to print >>>>> something way to big for litter. >>>>> >>>>> After that, using pprof might be your next step. >>>>> >>>>> Have you tried it on a really tiny package? >>>>> >>>>>>> On Wednesday, July 21, 2021 at 6:41:39 AM UTC-4 mlevi...@gmail.com >>>>>>> wrote: >>>>>>> Hi all, >>>>>>> >>>>>>> I'm having a very hard time with golang.org/x/tools/go/packages. Spent >>>>>>> most of my evening yesterday trying to understand what's happening here. >>>>>>> Here's my code: https://play.golang.com/p/5L1N0lSaetB >>>>>>> >>>>>>> With this very simple code I would expect that the program prints >>>>>>> detailed information about the package path I run it with. But whatever >>>>>>> the package, or module, I try to use this with, the program is killed >>>>>>> because it takes all the memory (~32GB) of my machine in a few seconds, >>>>>>> nothing ever gets printed... >>>>>>> >>>>>>> Here's my config: >>>>>>> GO111MODULE="" >>>>>>> GOARCH="amd64" >>>>>>> GOBIN="" >>>>>>> GOCACHE="/home/michel/.cache/go-build" >>>>>>> GOENV="/home/michel/.config/go/env" >>>>>>> GOEXE="" >>>>>>> GOFLAGS="" >>>>>>> GOHOSTARCH="amd64" >>>>>>> GOHOSTOS="linux" >>>>>>> GOINSECURE="" >>>>>>> GOMODCACHE="/home/michel/.go/pkg/mod" >>>>>>> GONOPROXY="" >>>>>>> GONOSUMDB="" >>>>>>> GOOS="linux" >>>>>>> GOPATH="/home/michel/.go" >>>>>>> GOPRIVATE="" >>>>>>> GOPROXY="https://proxy.golang.org,direct"; >>>>>>> GOROOT="/usr/local/go" >>>>>>> GOSUMDB="sum.golang.org" >>>>>>> GOTMPDIR="" >>>>>>> GOTOOLDIR="/usr/local/go/pkg/tool/linux_amd64" >>>>>>> GOVCS="" >>>>>>> GOVERSION="go1.16" >>>>>>> GCCGO="gccgo" >>>>>>> AR="ar" >>>>>>> CC="gcc" >>>>>>> CXX="g++" >>>>>>> CGO_ENABLED="1" >>>>>>> GOMOD="/dev/null" >>>>>>> CGO_CFLAGS="-g -O2" >>>>>>> CGO_CPPFLAGS="" >>>>>>> CGO_CXXFLAGS="-g -O2" >>>>>>> CGO_FFLAGS="-g -O2" >>>>>>> CGO_LDFLAGS="-g -O2" >>>>>>> PKG_CONFIG="pkg-config" >>>>>>> GOGCCFLAGS="-fPIC -m64 -pthread -fmessage-length=0 >>>>>>> -fdebug-prefix-map=/tmp/go-build3825502007=/tmp/go-build >>>>>>> -gno-record-gcc-switches" >>>>>>> >>>>>>> >>>>>>> I have tried many, many things yesterday, including: >>>>>>> - changing the `Mode` in the config >>>>>>> - using go/types directly ("can't find import" for the package I'm look >>>>>>> to parse) >>>>>>> - using different importers >>>>>>> - trying to load and parse different packages >>>>>>> - ... >>>>>>> >>>>>>> For context, and to avoid any XY problem here, my goal is to parse a >>>>>>> package and find an interface based on its name. Once this interface is >>>>>>> found, I need to range over its method set and generate a structure >>>>>>> implementing this interface, with (maybe not at the beginning but) a >>>>>>> lot of logic, e.g. detect that an interface returns an implementation >>>>>>> of itself, and so on. >>>>>>> I'm working on a tool to generate mock structures from their interface >>>>>>> method set, as a personal project, and this is kind of the most >>>>>>> important part of it (being able to automatically generate the mock). >>>>>>> >>>>>>> If anyone would kindly help me find what I'm doing wrong, or at least >>>>>>> point me to useful resources explaining how to fix my problem, I would >>>>>>> be reaaaaaally delighted. This has been a problem for days now... And I >>>>>>> can't find any relevant issue or blog as this is a peculiar context. >>>>>>> >>>>>>> Thanks in advance to all that will read this and have a nice day! :D >>>>>> >>>>> -- >>>>> You received this message because you are subscribed to the Google Groups >>>>> "golang-nuts" group. >>>>> To unsubscribe from this group and stop receiving emails from it, send an >>>>> email to golang-nuts...@googlegroups.com. >>>>> To view this discussion on the web visit >>>>> https://groups.google.com/d/msgid/golang-nuts/36cd11af-ee05-4e9e-8324-51212c80d99cn%40googlegroups.com. >>> >>> -- >>> You received this message because you are subscribed to the Google Groups >>> "golang-nuts" group. >>> To unsubscribe from this group and stop receiving emails from it, send an >>> email to golang-nuts...@googlegroups.com. >> >>> To view this discussion on the web visit >>> https://groups.google.com/d/msgid/golang-nuts/2aa03542-c6a4-4ace-8c84-b188c19b2ffdn%40googlegroups.com. > > -- > You received this message because you are subscribed to the Google Groups > "golang-nuts" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to golang-nuts+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/golang-nuts/5ebcea65-2833-4f5c-9ded-559d51065ac9n%40googlegroups.com. -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. 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