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Compiler -O3 Flag Undefined Behaviour C++ Develope T-Shirt

4.7 out of 5 stars rating
32992 Total Reviews |
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  3. Colour & Print Process: Black

    Vivid Printing: White Underbase

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Style: Basic Dark T-Shirt

Comfortable, casual and loose fitting, our heavyweight dark colour t-shirt will quickly become one of your favourites. Made from 100% cotton, it's unisex and wears well on anyone and everyone. We’ve double-needle stitched the bottom and sleeve hems for extra durability. Select a design from our marketplace or customise it to make it uniquely yours!

Size & Fit

  • Model is 188 cm and is wearing a medium
  • Standard fit
  • Garment is unisex sizing
  • Fits true to size

Fabric & Care

  • 100% cotton (Heathers are a cotton/poly blend)
  • Double-needle hemmed sleeves and bottom
  • Imported
  • Machine wash cold
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About This Design

Compiler -O3 Flag Undefined Behaviour C++ Develope T-Shirt

-O3. The compiler assumed you would never do that. So it deleted your safety check. Undefined Behaviour. Celebrate aggressive compiler optimisations and low-level systems reality with this minimalist dark-mode developer t-shirt. Featuring oversized bold typography for the notorious -O3 optimisation flag underlined by a sharp hazard-red laser bar, this design captures the classic C and C++ engineering trap: when code triggers Undefined Behaviour, modern compilers like GCC and Clang assume it can never happen and silently strip away your null-pointer or bounds safety checks for maximum speed. Crafted with high-contrast white and laser-red typography on a clean dark aesthetic for C/C++ programmers, compiler engineers, Rust developers, and systems purists. Screen-printed on ultra-soft, premium heavyweight combed cotton.
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Customer Reviews

4.7 out of 5 stars rating33K Total Reviews
25847 total 5-star reviews4995 total 4-star reviews1126 total 3-star reviews515 total 2-star reviews509 total 1-star reviews
32,992 Reviews
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By Robert C.1 March 2022 • Verified Purchase
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I purchased this to test to see if zazzle was producing good quality. Needless to say, they are. The sizing runs a bit on the small size though. Print quality is perfect. What you see on the screen is what you get.
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By Sandy D.6 December 2025 • Verified Purchase
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Tags

undefined behaviourcompiler optimisationcpp developerc programminggccclangsystems programminglow levelsoftware engineer shirtcomputer science

Other Info

Compiler -O3 Flag Undefined Behaviour C++ Develope T-Shirt
Product ID: 256328284461936515
Added on 12/11/2026, 6:25 am
Rating: G