Nostr notes by

rebase.updateRefs

2026-07-11T20:12:26Z

In reply to nevent1q…em08
_________________________

rebase.updateRefs

Peas and custard, a British classic

2026-07-11T16:37:56Z

In reply to nevent1q…d09r
_________________________

Peas and custard, a British classic

See my third reply. Turns out it is built in :)

2026-07-10T18:51:52Z

In reply to nevent1q…gswa
_________________________

See my third reply. Turns out it is built in :)

When I say "automatically", what I mean is: Yes I know I ...

2026-07-10T15:32:23Z

In reply to nevent1q…x2hl
_________________________

When I say "automatically", what I mean is: Yes I know I can `git rebase -i ...` and then in the rebase todo file, manually insert commands to `exec git branch -f orange-phase1` etc... at the right places. But that's a lot of manual thinking and typing just to maintain it. I feel it should be automatic.

Can anyone help me with this?

A #git workflow question. I have a branch (lets call it ...

2026-07-10T15:31:29Z

A #git workflow question.

I have a branch (lets call it "orange"), that adds a whole bunch of features on top of main. I regularly rebase this from main. I also have a bunch of points on that branch marked as other branches ("orange-phase1", "orange-phase2", etc...) that are convenient points for PRs - either currently open or intended in the future.

Is there a way I can **automatically** maintain these branches whenever I `git rebase main`?

A family favourite in Scrabble

2026-07-10T11:15:51Z

In reply to nevent1q…6luk
_________________________

A family favourite in Scrabble

A capitalist is someone who would rent sunlight to poor people if ...

2026-07-10T10:01:35Z

A capitalist is someone who would rent sunlight to poor people if only he could work out how.

https://mastodon.social/@sundogplanets/116893541666491703

I was watching father-in-law attempting to view a 20ish minute ...

2026-07-09T15:10:27Z

In reply to nevent1q…9h8v
_________________________

I was watching father-in-law attempting to view a 20ish minute YouTube video to teach something. It wasn't even that much to learn but every 2 minutes or so the video was interrupted by the same 15second advert. I wasn't even interested in watching it myself but even I was getting annoyed at the advert.

I didn't think a lesson in Firefox plus uBlock would have gone down well at the time though.

The really fun bit is that you can assign a replacement of a ...

2026-07-07T11:06:24Z

In reply to nevent1q…2sy8
_________________________

The really fun bit is that you can assign a replacement of a different length and it will do the right thing by shuffling the part of the string after it

Yes, there are a few functions that can operate as lvalues. ...

2026-07-07T09:27:57Z

In reply to nevent1q…2sy8
_________________________

Yes, there are a few functions that can operate as lvalues. What's even cooler is that you can make your own :)

Post-processing filter? Or maybe nobody involved in such would ...

2026-07-06T18:08:55Z

In reply to nevent1q…jzv5
_________________________

Post-processing filter? Or maybe nobody involved in such would bother with it

I always used to be disappointed when I saw typos or spelling ...

2026-07-06T10:32:35Z

I always used to be disappointed when I saw typos or spelling mistakes in online articles, but now I realise I have a small smile of "Ah, at least this shows it was actually written by a human" and often don't worry about them.

What times we live in...

Now imagine if it was properly deep-syntax aware like in the ...

2026-07-04T09:55:41Z

In reply to nevent1q…8efj
_________________________

Now imagine if it was properly deep-syntax aware like in the Lisps...

There's a roundabout way in which that story is related to ...

2026-07-02T09:12:37Z

In reply to nevent1q…ar0e
_________________________

There's a roundabout way in which that story is related to why I was quit-fired from Google

Well quite. This was the point I was trying to make about a ...

2026-06-30T22:03:37Z

In reply to nevent1q…8mtm
_________________________

Well quite. This was the point I was trying to make about a gallium teaspoon.

It's useless for the primary purpose of a teaspoon being to stir tea, but it might be useful for things like serving ice-cream. A "gallium teaspoon" is something that while being useless for its stated primary purpose, might still find utility in other jobs.

"as useful as a gallium teaspoon" just popped into my ...

2026-06-30T21:38:58Z

"as useful as a gallium teaspoon" just popped into my head

Moreover, when we had all those things back then it might have ...

2026-06-29T23:32:39Z

In reply to nevent1q…2kcu
_________________________

Moreover, when we had all those things back then it might have been called "AI" sometimes, but that was a good word, a good thing. Now even the very name of "AI" has been tainted and ruined by all this modern terribleness.

I don't know if it's pure coincidence, recency bias, or ...

2026-06-29T15:56:30Z

I don't know if it's pure coincidence, recency bias, or actual causality, but I am noticing more people doing work with ceiling fans, ever since Technology Connections (npub1j9l…jvxt) did the recent video about them

It was great to be alive during that brief period of human ...

2026-06-26T19:09:04Z

It was great to be alive during that brief period of human history after the invention of the smartphone camera but before the invention of generative AI that can create images. It meant that, for a few years, I was able to trust that pictures I saw online were of something that actually happened.

1900 days; that's over 5 years. Perseverence is definitely ...

2026-06-26T14:29:50Z

In reply to nevent1q…n7k2
_________________________

1900 days; that's over 5 years. Perseverence is definitely living up to its name

Oh I see now; it's lead as in the opposite of lag. I was ...

2026-06-26T11:57:00Z

In reply to nevent1q…qcv7
_________________________

Oh I see now; it's lead as in the opposite of lag. I was confused why such a function would be named after the metal Pb.

Do you have any advice for those of us who live here?

2026-06-23T11:23:27Z

In reply to nevent1q…jff3
_________________________

Do you have any advice for those of us who live here?

Ohsure. It;s amusing to watch the world decidedly not turning out ...

2026-06-19T10:07:59Z

In reply to nevent1q…6rz9
_________________________

Ohsure. It;s amusing to watch the world decidedly not turning out the way the greedy initial investors wanted.

I think the sensible investment at this point would be in popcorn and tiny violins. ;)

These two facts are linked. The vendors can't make a profit ...

2026-06-19T08:52:16Z

In reply to nevent1q…c9k2
_________________________

These two facts are linked.

The vendors can't make a profit _yet_ because they're not charging enough, but nobody would opt to buy it at profitable prices.

But what if everyone became so dependent on it that they really need it and will pay whatever the price is? At that point the vendors can charge to make a profit.

Most definitely. Every time I upgrade a module to using them, at ...

2026-06-17T11:20:35Z

In reply to nevent1q…2zfl
_________________________

Most definitely.

Every time I upgrade a module to using them, at the very least I manage to delete lots of lines of `my $self = shift;` or various snail-array unpacking.

Also quite often I tend to hit at least one test failure somewhere where a caller accidentally passed too few or too many arguments. The fact that signatures also do arity checking when unpacking from snail didn't keeps uncovering so many of those little bugs.

I always remember a BBC News headline that got truncated: Postal ...

2026-06-12T09:51:54Z

In reply to nevent1q…rxjt
_________________________

I always remember a BBC News headline that got truncated:

Postal Workers Petition to Keep Queen's Head...

... on

... Stamps

I think they're called "bakers"

2026-06-10T10:06:53Z

In reply to nevent1q…tcee
_________________________

I think they're called "bakers"

It's a great feature, I had much success with it.

2026-05-22T22:32:21Z

In reply to nevent1q…50s6
_________________________

It's a great feature, I had much success with it.

https://fosstodon.org/@leonerd/116558595521389427

2026-05-16T08:54:16Z

In reply to nevent1q…ap2l
_________________________

https://fosstodon.org/@leonerd/116558595521389427

Nostr event nevent1qqsdfp5rvxqs065zcv8thwqycpjc9hzvxsu7yxhn3kjx2jlkjjre4kqzyzlux6cp86pwl5pjl38s432cu9avyj3npsa48gt46kgtw82zy69r6pev6w6

2026-05-15T08:20:42Z

In reply to nevent1q…scvj
_________________________

Amazon

99.9% uptime permits 43 minutes down per 30 days. Even four-nines ...

2026-05-13T09:17:37Z

In reply to nevent1q…tj9s
_________________________

99.9% uptime permits 43 minutes down per 30 days.

Even four-nines = 99.99% uptime allows 4 minutes and 20ish seconds, enough for one quick reboot in a month. Not quite enough time to listen to John Cage ;)

Yeah but I don't want to use cocaine because I'd just be ...

2026-05-11T23:43:42Z

In reply to nevent1q…kqkh
_________________________

Yeah but I don't want to use cocaine because I'd just be funneling money to a few central druglord kingpins. And I'd be encouraging a society where everyone would be dependent on it and couldn't function without it any more.

Wait, are we still being literal or is this an analogy?

"the previous" post requires ordered messaging. IRC ...

2026-05-11T14:03:10Z

In reply to nevent1q…ns2n
_________________________

"the previous" post requires ordered messaging. IRC doesn't guarantee all messages take the same path and thus arrive in-order.

IRCv3 does have a solution to this; allowing edits, replies, reactions, etc... but all by referring to previous messages by some originator specified message ID. It extends the data model quite a bit to achieve that.

Mouser let me add it to the basket and even pay at the checkout. ...

2026-05-05T20:27:47Z

In reply to nevent1q…4qas
_________________________

Mouser let me add it to the basket and even pay at the checkout. They then cancelled it before shipping.

Today I learned that ADI aren't selling to individuals any ...

2026-05-05T20:17:47Z

Today I learned that ADI aren't selling to individuals any more and have instructed all their distributors not to either.. :( So... this kinda sucks. There's now a whole lot of parts for my boards I can no longer buy.

I wonder what the workarounds for this are now..

#electronics

Woo. You achieved a successful migration then. Looks like I shall ...

2026-05-01T15:43:36Z

In reply to nevent1q…q0a0
_________________________

Woo. You achieved a successful migration then.
Looks like I shall try out some of my own today.

Do you need to write four bytes of arbitrary content into the ...

2026-05-01T15:41:39Z

Do you need to write four bytes of arbitrary content into the page cache of a file you don't own?

You can achieve it with this One Easy Trick. Sysadmins hate it.

I don't know why it's called "one-time pad" ...

2026-05-01T11:31:54Z

I don't know why it's called "one-time pad" authentication. I must have used it ten times today at least...

I shall be eagerly watching your (and others') migrations. I ...

2026-04-30T11:25:40Z

In reply to nevent1q…7g3e
_________________________

I shall be eagerly watching your (and others') migrations. I may move my own store over that way myself.

Real Names Considered Harmful

2026-04-29T09:28:00Z

In reply to nevent1q…k38r
_________________________

Real Names Considered Harmful

Whenever I get a low memory warning, I take a look around the web ...

2026-04-26T16:55:10Z

In reply to nevent1q…345w
_________________________

Whenever I get a low memory warning, I take a look around the web at RAM modules for sale. Then the prices scare me so much I close the entire browser process.

Which admittedly does solve the problem ;)

First morning of Perl Toolchain Summit is going well. What I ...

2026-04-23T06:54:30Z

First morning of Perl Toolchain Summit is going well. What I thought was the coffee button on the machine at breakfast turned out to be hot chocolate. So now instead of waking me up after my nearly-midnight arrival, I'll be even more asleep before we start. #pts2026

I've been with them continuously for the past nearly 20 ...

2026-04-19T19:04:00Z

In reply to nevent1q…l8pj
_________________________

I've been with them continuously for the past nearly 20 years. Thoroughly decent folks full of clue and competence. Would recommend

Yes the total silence from them is the most annoying thing jere. ...

2026-04-17T14:16:55Z

In reply to nevent1q…ykma
_________________________

Yes the total silence from them is the most annoying thing jere.

Tindie: Please tell us what's going on, and whether we can expect things to ever come back, at this point. Otherwise we may start to assume the worst.

Yup, we take the whole back-compat thing seriously. If you want ...

2026-04-09T20:05:12Z

In reply to nevent1q…klut
_________________________

Yup, we take the whole back-compat thing seriously. If you want to write a script that'll still work in a decade or two, write it in Perl.

Amused that there is both a "TRY NOT" and a struck ...

2026-03-28T12:04:02Z

In reply to nevent1q…54qp
_________________________

Amused that there is both a "TRY NOT" and a struck through "TRY"

Clouded leopard. One of these guys ...

2026-03-28T00:04:51Z

In reply to nevent1q…g0pz
_________________________

Clouded leopard. One of these guys

https://www.nationalgeographic.com/animals/mammals/facts/clouded-leopard

Ones you see at zoos and animal rescue places are very friendly with their keepers, so I imagine I'd have no trouble with it. Plus it's a cat. Cats are always cool.

Indeed so, in fact it was quite a bug waiting to happen. Before ...

2026-03-26T00:21:52Z

In reply to nevent1q…0698
_________________________

Indeed so, in fact it was quite a bug waiting to happen. Before that change, I was about to make a bugfix and then realised I would have to edit both sides of the ifdef, and then arrange to test both sides as well. It seemed not worth the trouble just for those two old versions (5.18, 5.20).

It always annoys me that ASCII and thereafter Unicode always said ...

2026-03-25T13:55:22Z

In reply to nevent1q…xy0p
_________________________

It always annoys me that ASCII and thereafter Unicode always said they weren't going to add formatting mechanisms, as that was for other people. And so instead Markdown invented a way to be always ambiguously unsure about the meanings of regular ASCII punctuation to stand in for formatting requests.

Just think what we could have had instead...

Ahhh; much tidy ``` 13 files changed, 15 insertions(+), 261 ...

2026-03-24T12:57:13Z

In reply to nevent1q…7wyp
_________________________

Ahhh; much tidy

```
13 files changed, 15 insertions(+), 261 deletions(-)
```

Today I have decided to bump the minimum #Perl version ...

2026-03-24T12:38:26Z

Today I have decided to bump the minimum #Perl version requirement of Object::Pad up from 5.18 (released in summer of 2013), to 5.22 (released in summer of 2015). This has allowed me to remove quite a lot of ifdef-guarded code, as well as plenty of workarounds for missing things (the UNOP_AUX and PADNAME types) in those older perl versions.

This sort of spring cleaning is useful to do every once in a while.

I usually sideload bread into my toaster. I buy bread from a ...

2026-03-20T18:15:16Z

In reply to nevent1q…93gg
_________________________

I usually sideload bread into my toaster. I buy bread from a different company than that which made my toaster.

(Well, I load the bread in from the top like a normal toaster. ;) )

Debian, XFCE, Sawfish.

2026-03-16T14:49:45Z

In reply to nevent1q…jvwm
_________________________

Debian, XFCE, Sawfish.

Yeah that got it.

2026-03-16T13:51:46Z

In reply to nevent1q…82xx
_________________________

Yeah that got it.

Ahhh - there it is, lovely :) I was looking in the ...

2026-03-16T13:51:34Z

Ahhh - there it is, lovely :) I was looking in the "Interface" section, as I imagined that's where it would be.

Actually for that matter, does anyone know how to actually move ...

2026-03-16T13:43:36Z

Actually for that matter, does anyone know how to actually move the #Steam window on the screen in #Linux ?
You'd think you just drag it from the top bar and indeed it moves, but it does something super weird to the mouse so the very next time you click the mouse the window jumps back to its original location.

Does anyone know how to set the font size on the #Linux #Steam ...

2026-03-16T13:39:19Z

Does anyone know how to set the font size on the #Linux #Steam client? It's tiiiiiiny. I can't read it on my laptop screen. I usually set everything a lot bigger than this.

Yes I'm feeling nervous just looking at it. That said I ...

2026-03-15T12:06:49Z

In reply to nevent1q…z865
_________________________

Yes I'm feeling nervous just looking at it. That said I don't think the terrible perspective on the photo composition job is helping matters

Sometimes I declare a bug to be a bath-worthy problem. Once I run ...

2026-03-15T10:10:14Z

In reply to nevent1q…nhgw
_________________________

Sometimes I declare a bug to be a bath-worthy problem. Once I run the bath I'm kinda committed to lazing in it for an hour and just thinking

When you say "per person", is that per person in the ...

2026-03-10T14:17:32Z

In reply to nevent1q…nglr
_________________________

When you say "per person", is that per person in the donating country, or the receiving one?

Who is the "us" in this headline?

2026-03-05T10:56:58Z

In reply to nevent1q…mjf6
_________________________

Who is the "us" in this headline?

Do you know what I think? Donald Trump's bored of peace

2026-03-02T14:38:48Z

Do you know what I think?

Donald Trump's bored of peace

Yeah, I didn't really want a higher resolution. All it means ...

2026-02-24T22:50:18Z

In reply to nevent1q…2yuh
_________________________

Yeah, I didn't really want a higher resolution. All it means is I turn up the font sizes on everything and get the same amount of text on the screen but now it has slightly smoother curves to it. Overall it doesn't really feel worth it.

Does anyone know how I can set the default zoom for all of Google ...

2026-02-24T21:45:49Z

Does anyone know how I can set the default zoom for all of Google Docs/Sheets/etc... to some number bigger than 100%?

Since I bought a laptop in the past, ohhh... five years, I have a screen resolution sufficiently high that the default font size is tiiiiiiiny.

I think my todo list only grows over time. It's a good thing ...

2026-02-24T16:41:09Z

I think my todo list only grows over time. It's a good thing I don't have any children or they'd have to inherit it, and I wouldn't wish that on anyone

Did Windows 95 actually come with a Hotdog Stand theme? I only ...

2026-02-11T09:10:23Z

In reply to nevent1q…aw97
_________________________

Did Windows 95 actually come with a Hotdog Stand theme? I only remember it from 3.1

Ooh, cute ;) Though in my case one of the devices is a Raspberry ...

2026-02-08T14:48:33Z

In reply to nevent1q…ghxy
_________________________

Ooh, cute ;) Though in my case one of the devices is a Raspberry Pi, so it wouldn't work here.

They say you can't directly link two computers by a USB ...

2026-02-08T14:34:42Z

They say you can't directly link two computers by a USB cable. But I don't believe those people.

Mmm; cute idea though I don't like the `setcap` approach for ...

2026-02-07T21:48:11Z

In reply to nevent1q…kj64
_________________________

Mmm; cute idea though I don't like the `setcap` approach for this particular problem, because the binary would be /usr/bin/perl and that feels a bit of a heavy shotgun to apply in this case.

Looking for software recommendations, for a Raspberry Pi. ...

2026-02-07T21:42:49Z

Looking for software recommendations, for a Raspberry Pi.

Smallest/lightest way to redirect TCP port 80 over to some high-numbered port for running an http server as non-root.

I *could* run lighttpd or haproxy or somesuch; but is there anything even smaller?

I don't know as if the history is saved anywhere. Probably ...

2026-02-07T14:14:19Z

In reply to nevent1q…e0c0
_________________________

I don't know as if the history is saved anywhere. Probably your best bet is to hunt all the `.packlist` files in $PERL5LIB and sort by modtime

Yeah; unfortunately the language design is too deeply ingrained ...

2026-02-06T16:08:49Z

In reply to nevent1q…a2ms
_________________________

Yeah; unfortunately the language design is too deeply ingrained that control-flow statements and value expressions are two different things. See also if/else vs ? :, foreach vs map, etc etc.

Scheme by comparison has no such distinction; it'd be a nicer way to work.

Ahhhhhh!

2026-02-05T17:01:32Z

In reply to nevent1q…dkh7
_________________________

Ahhhhhh!

:1,$d works just as well in vim or nvim If you did want to do ...

2026-02-05T10:14:30Z

In reply to nevent1q…t30s
_________________________

:1,$d works just as well in vim or nvim

If you did want to do that visually there's ggdG

Version numbers in particular

2026-02-05T00:01:46Z

In reply to nevent1q…r4vy
_________________________

Version numbers in particular

Some people have a TODO list. Or a TODO heap. For me I think ...

2026-02-03T12:46:43Z

Some people have a TODO list. Or a TODO heap. For me I think it's more of a TODO directed graph.

At this point I'm not even sure it's acyclic.

Kinda like those model villages that depict the place where they ...

2026-01-28T09:40:23Z

In reply to nevent1q…f7ag
_________________________

Kinda like those model villages that depict the place where they are, so they include a tiny model of themselves.

This one being one of my favourites: The model has two further recursive copies as models, and a final one in just paint.

https://en.wikipedia.org/wiki/Bourton-on-the-Water_model_village

For context, assuming a global population of 9 billion people, ...

2026-01-19T13:47:42Z

In reply to nevent1q…hpnz
_________________________

For context, assuming a global population of 9 billion people, that's $277 for every single person on Earth.

This has real @npub1g8x…7wul energy A TV remote control using ...

2026-01-19T11:17:02Z

This has real Alice Averlong🏳️‍⚧️ (npub1g8x…7wul) energy

A TV remote control using floppy disks

https://hackaday.social/@hackaday/115920966006526350

I made a thing. I now need to post it from UK to Europe. How on ...

2026-01-17T13:52:08Z

I made a thing. I now need to post it from UK to Europe. How on earth do people do that these days? I have to work out a 4 (6?) digit HS customs code for it. How do I know it's even approximately correct?

Fairly sure that Salvador Dali painted one of these

2026-01-16T17:01:34Z

In reply to nevent1q…flua
_________________________

Fairly sure that Salvador Dali painted one of these

Wow, that's going to be very dated indeed. We've added a ...

2026-01-15T17:33:46Z

In reply to nevent1q…8p67
_________________________

Wow, that's going to be very dated indeed. We've added a lot of good stuff in the past 26 years ;)

https://sheet.shiar.nl/perl

What happens if you try to put in a date in the future?

2026-01-15T00:29:14Z

In reply to nevent1q…2v2s
_________________________

What happens if you try to put in a date in the future?

"Did you mean: stop time?"

2026-01-13T15:51:38Z

In reply to nevent1q…rex7
_________________________

"Did you mean: stop time?"

During my recent debugging of a `Future`-related memory leak ...

2026-01-13T15:13:50Z

During my recent debugging of a `Future`-related memory leak issue, I had occasion to swap a program from using `Future::XS`, to the pure-perl `Future::PP` implementation instead.

As the program runs a very flat stable CPU load, such a change made it easy to see the performance different such a change made.

And here it is. ...

2026-01-13T14:52:50Z

In reply to nevent1q…fhdc
_________________________

And here it is.

https://metacpan.org/release/PEVANS/Future-XS-0.15

That concludes this particular story, though I have at least two follow-up thoughts to add, but I'll write those in separate threads. I think this one has gone on long enough now.

Success :) Having left this version of the code running for over ...

2026-01-13T12:59:58Z

In reply to nevent1q…dm80
_________________________

Success :) Having left this version of the code running for over 24 hours, it indeed hasn't shown any signs of a leak.

I think we're onto a winner here, I'll pop this up on CPAN.

Another in the same vein: ...

2026-01-12T15:38:33Z

In reply to nevent1q…xl5n
_________________________

Another in the same vein:

https://fosstodon.org/@leonerd/115649681945671656
nostr:note1xcmqlyelwv08v3evad3xuas2x4nrp9ggsxjexuslulupt39wk76s8texgd

With this one-line fix in place, the newly-added unit test passes ...

2026-01-12T12:56:27Z

In reply to nevent1q…ul4u
_________________________

With this one-line fix in place, the newly-added unit test passes at least.

I'll put this code on my real machine and see how it holds up. If that appears to fix it, then I'll ship it to CPAN as the next version of `Future::XS` tomorrow.

Knowing the shape of the code around handling of ...

2026-01-12T12:53:58Z

In reply to nevent1q…fggm
_________________________

Knowing the shape of the code around handling of `Future::Exception` instances, it didn't take me too long to poke around and find a place where a reference is accidentally retained.

After a nested call to the `Future::Exception->new`, the result if `SvREFCNT_inc()`ed to retain it over the `FREETMPS; LEAVE;` at the end of the method call, but we forgot to re-mortalize it when pushing it to the stack for the next call.

An additional `sv_2mortal()` is needed.

For an extra bit of confirmation that this seems to be the bug ...

2026-01-12T11:53:34Z

In reply to nevent1q…fm2v
_________________________

For an extra bit of confirmation that this seems to be the bug we're looking for, we can also inspect the `.pmat` files that the failing test wrote.

By running both through the `pmat-diff` tool, it compares the gained and lost SVs on each side, and tries to associate them together. It'll draw a summary of what it finds:

Here we indeed find an ARRAY blessed as `Future::Exception`, holding five other SVs. Seems to match what we'd expect.

Knowing the source of the leak is in `Future::XS` helps narrow it ...

2026-01-12T11:45:45Z

In reply to nevent1q…xxr5
_________________________

Knowing the source of the leak is in `Future::XS` helps narrow it down. That's not a big distribution, not many lines of code that deal with `Future::Exception` objects anyway.

It didn't take me long to manage to write a test using `Test::MemoryGrowth` that indicates failure:

https://metacpan.org/pod/Test::MemoryGrowth

I left this running without `Future::XS` over the weekend to see ...

2026-01-12T11:39:23Z

In reply to nevent1q…r0th
_________________________

I left this running without `Future::XS` over the weekend to see what would happen.

It did use a constant amount more memory than with (that's to be expected), but it didn't grow at all over the time. Moreover, the per-class breakdown doesn't show any growing collection of `Future::Exception` objects at all. It seems we are on the right path.

Quite so. As I said, I suspect a missing `SvREFCNT_dec()` call ...

2026-01-09T14:34:16Z

In reply to nevent1q…3u3w
_________________________

Quite so. As I said, I suspect a missing `SvREFCNT_dec()` call somewhere in one of my XS modules. The trick now is identifying which module and where it should go.

Missing code is always the hardest kind to find. ;)

Well the failure itself comes from this line here: ...

2026-01-09T14:25:26Z

In reply to nevent1q…k8pk
_________________________

Well the failure itself comes from this line here:

https://metacpan.org/dist/Device-Serial-SLuRM/source/lib/Device/Serial/SLuRM.pm#L707

but knowing this isn't directly any help. The problem is that something somewhere is retaining these exception objects indefinitely and not throwing them away. That's the part I need to investigate.

It also turns out that I forgot to actually document the way to ...

2026-01-09T14:21:33Z

In reply to nevent1q…968w
_________________________

It also turns out that I forgot to actually document the way to skip loading the `Future::XS` module, so I can't link to any docs of that for this thread ;)

While I leave this to run overnight again and maybe or maybe-not accumulate any more leaks, I can spend a moment to write about that ;)

I think that's enough for today, I'll wait and see what this yields tomorrow...

At this point there are no more immediate steps we can take, so ...

2026-01-09T14:19:47Z

In reply to nevent1q…lp46
_________________________

At this point there are no more immediate steps we can take, so we will have to try a few other ideas.

Knowing the surrounding code, I know there's a couple of XS-implemented modules around Future handling, so it seems likely one of those has forgotten to `SvREFCNT_dec()` an exception reference.

One of those modules, `Future::XS`, is an optional performance improvement and can be skipped. By restarting the program without it we can wait and see if the problem continues.

Next we can try using the `identify` command on this example ...

2026-01-09T14:11:58Z

In reply to nevent1q…4w30
_________________________

Next we can try using the `identify` command on this example object, to see what is retaining it, and hopefully gain some insight into the actual bug.

Unfortunately for us, this doesn't lead anywhere. The ARRAY is being held by a scalar REF instance, but nothing in the heapdump can find what is holding on to that.

Picking one of these at random, we can inspect it to see its ...

2026-01-09T13:45:23Z

In reply to nevent1q…sy25
_________________________

Picking one of these at random, we can inspect it to see its contents.

The message says it's about a timeout that happened, which again seems to correlate with the occasional staircase shape. These timeouts were rare, so it seems these exception values have been retained by something somewhere.

Next, loading the second file into the `pmat` tool shell lets us ...

2026-01-09T13:24:17Z

In reply to nevent1q…8hfx
_________________________

Next, loading the second file into the `pmat` tool shell lets us poke at it in more detail. Since we already have a good ldea it's related to these `Future::Exception` instances, lets start by grabbing a list of those.

Seems like there's quite a few.