Mara Bos

@mara

Rust dev, Electronics engineer, Author, RustNL, RustWeek organizer, ADHD, Polyamorous, Lesbian, She/Her

111 Following5,578 Followers182 Posts

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Mara Bos@mara· 3d

That isn't just the food and drinks; that amount also covers renting out the 1000-person capacity restaurant with enough personel to serve lunch for 850 people all at once. I think the 'hallway track' is by far the most important part of a conference, so I find it important we invest in that.

A large restaurant filled with many Rustaceans. There are quite a few 6-person booths with people having conversations.

Mara Bos@mara· Jul 6

Yeah sure. Shall I email it to you?

$$ grep -E MemTotal\|MemAvail /proc/meminfo MemTotal: 263756028 kB MemAvailable: 201759380 kB$

Mara Bos@mara· Jun 29

Oops, unsafe attributes were missing. Updated it. :)

The same back side of the unsafe Rust license card, but this time with a new line added in the table:

Code F: Unsafe attributes

Mara Bos@mara· Jun 29

Now I can finally commit Rust code crimes legally. 😌

A plastic id card with "unsafe rust license" written at the top. It shows my picture and a bunch of details:

Surname: Bos
Given names: Mara
Date of birth: 1993-01-01
Issuance date: 2026-06-29
Expiration date: 2036-06-29
Document number: V33192834QC

Issued by the Rust Licensing Authority

The back side of the card, showing a table of different rust operations.

Unsafe Rust License
Certifications for unsafe Rust operations.

Code A: Raw pointer dereference.
Code B: Call unsafe functions and methods
Code C: Mutable static access
Code D: Implement unsafe traits
Code E: Access union fields

All with the same issue and valid until date: 27 june 2026 and 2036.

License only valid for the indicated operations.

The bottom part of the card shows a machine readable zone with a lot of less-than characters.

Mara Bos@mara· Jun 27

Can't wait for this new release. 🎮

A slide showing "Unvalued Goose Game - by SoftBank", the goose from untitled goose game "goose value 0?", three golden eggs, and a warning sign with an icon of an egg with "ASI" written on it.

Mara Bos@mara· Jun 23

A slice of pizza with the trext "This is a pizza" burned onto the crust in the Papyrus font.

Mara Bos@mara· Jun 23

Metal business cards!

Mara Bos@mara· Jun 21

Look at how precise this thing is. Unbelievable.

Many tiny Rust logos cut out of white paper. A measuring tape is visible for scale, showing that the logos are smaller than a centimetre each.

Mara Bos@mara· Jun 21

More serously, this machine is magic. It somehow cuts wood without charring the edges?

Mara Bos@mara· Jun 21

I feel so powerful now, being able to inflict the wonders of Comic Sans onto every single object in my house.

Handle of a metal knife with the phrase "This is a knife!" engraved on it in comic sans.

Mara Bos@mara· Jun 21

Someone made the mistake of getting me a UV laser engraving machine. ... (It was me.)

An egg with the word "egg" engraved into the shell. The top layer of the shell is gone and the layer below it is visible in those letters. There are no burnmarks or discolorations, somehow.

A goldfish cracker with text engraved/burned on there in a tiny font. The text is: "Do you think this is still safe to eat??"

A green leaf with the letters "hello world" cut out in the middle, held up to the sky.

Mara Bos@mara· Jun 12

The spikes of a sea urchin can look kinda fluffy: www.instagram.com/p/DS5158GD1l...

Sea urchin with short white spikes held in someone's hand.

Mara Bos@mara· Jun 12

I'm happy Corro is finally getting more attention. :D Here's the other sticker Paige drew for RustWeek:

Cute drawing of Ferris the crab and Corro the Rusturchin. Ferris blinks confidently. Corro ia waving and looks very anxious.

Mara Bos@mara· Jun 4

I can't believe it's already been two weeks.

All the speakers, workshop trainers, volunteers, and organizers standing in front of a huge cinema screen. The screen is showing RustWeek 2026, and the subtitles say "yeah. Pictures. Who's got a good camera?"

Mara Bos@mara· Jun 4

My favorite part of the credits roll was the very last part, where we announced the dates and location for RustWeek 2027 perfectly in sync with the last "bang" of the audio. At that same time, the info screens downstairs in the cinema all switched to displaying the same information, with a QR code.

Black screen displaying in white: RustWeek 2027, Utrecht, Netherlands, 24-29 May 2027. Tickets available NOW!

Mara Bos@mara· Jun 4

Since RustWeek took place in a cinema, we ended the closing session properly with a cinematic credits roll. ✨ If you missed it or want to see it again: 2026.rustweek.org/credits/

Still of the credits roll, displaying:

Organized by RustNL

Director
Erik Jonkers
Mara Bos
Volunteer organizer
Laura Pircalaboiu
Jana Dönszelmann
Terts Diepraam
Consultant
Josine Kamperman (ONlive)

Speakers
in order of appeareance

Main track
Taylor Cramer
Waffle
Stefan Baumgartner
Rose Peck
Andreea Costea
Cliff L. Biffle

the last line is only partially visible, the rest is cut off.

Mara Bos@mara· Jun 2

9. "Jurassic std::thread::park()" (Jurassic Park)

A movie poster for "Jurassic std::thread::park()". Instead of a dinosaur silhouette, it shows the silhouette of Corro. The tagline says "A Deadlock 65 Million Years In The Making."

Mara Bos@mara· Jun 2

I also reused two posters that I designed last year: 8. "Box<impl Future>" (Back to the Future)

A movie poster for "Box<impl Future>" in the same style as the the original Back to the Future poster. It shows the back of the DeLorean with license plate "ENOMEM" and the tagline is "1.21 gigabytes".

Mara Bos@mara· Jun 2

7. "PhantomData of the Opera" (The Phantom of the Opera)

A poster for "PhantomData of the Opera". It shows a Corro shaped mask and a red rose on a dark background.

Mara Bos@mara· Jun 2

6. "The Day After Release" (The Day After Tomorrow)

A movie poster for "The Day After Release" with tagline "Where Will Your Feature Be?". The text is in the same font as used on the movie poster of The Day After Tomorrow. The background is a huge stormy sea wave.

Mara Bos@mara· Jun 2

5. "mem::forget" (Memento)

A movie poster for mem::forget, similar to the movie poster of Memento. It shows a large polaroid with Ferris and a smaller polaroid of Corro holding a smaller polaroid with Ferris again, repeat.

The outermost polaroid has "mem::forget" written on it, and on the first smaller one it says "some objects are best forgotten".

Mara Bos@mara· Jun 2

4. "E.T. - the Extern Type" (E.T. - the Extra-Terrestrial)

A movie poster for "E.T. - The Extern Type". It shows two crab claws touching each other with a light effect coming from the touch. The background is the night sky with a large moon on top of which the shadow of a code snippet of an extern type is visible. The tagline at the top of the poster says "its adventure in Rust".

Mara Bos@mara· Jun 2

3. "28 Errors Later" (28 Years Later)

A movie poster for "28 Errors Later" with tagline "cargo didn't fix anything". It looks like the movie poster for 28 Years Later, but with the skulls replaced by Corro the Unsafe Rusturchin.

Mara Bos@mara· Jun 2

2. "The Lord of the RingBuffers: The Two Pointers" (The Lord of the Rings: The Two Towers)

A movie poster for "The Lord of the Ring Buffers - The Two Pointers" showing the silhouette of two towers with a sepia colored sky with a large moon in the background.

Mara Bos@mara· Jun 2

1. "Hail Miri" (Hail Mary)

A movie poster for "Hail Miri" using the same font as the Hail Mary poster, showing a big green planet with a huge Corro (the unsafe rustacean mascot) behind it.

Mara Bos@mara· Jun 2

Just like last year, we replaced a whole wall of movie posters with our own punny movie posters at the cinema where RustWeek 2026 took place. I designed seven new posters for this year's event. See the thread below 👇

Nine movie posters displayed next to each other.

Mara Bos@mara· May 15

Can't believe this was a whole year ago. Good memories. 🥰

Many many happy Rustaceans at the 10 years of Rust celebration.

Happy Rustaceans at the 10 years of Rust celebration, watching the big red button being pressed on stage to release Rust 1.87.

Mara Bos@mara· May 13

For those of you watching RustWeek from home: our schedule now supports switching timezones between the conference timezone and your own timezone! 🕣 It'll also use 12-hour or 24-hour time depending on your locale settings. ✨ 2026.rustweek.org/schedule/tue... See you next week! 💛

Screenshot of the top of the RustWeek schedule, with a toggle button that allows you to switch between the conference timezone (CEST) and your own timezone (PDT in this example).

Mara Bos@mara· May 6

Less than two weeks left! Tickets are selling rapidly, make sure to get yours before they sell out! 2026.rustweek.org If you aren't convinced yet, look at how cute our conference badges are: 🦀

Mara Bos@mara· Apr 28

It's finally time to announce the opening talk of the RustWeek 2026 main track! 2026.rustweek.org/talks/taylor/ Don't forget to buy your tickets, before they run out!