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Patch rustc 1.97.1 with the "You've fallen asleep" compilation error

This vibecoded patch reproduces the functionality of rust-lang/rust#98551 which was built on top of rustc 1.62.0 and very regrettably was not accepted upstream.

This patch is based on the latest version of rustc as of now (Jul 30 2026), 1.97.1:

$ which ninja cmake || echo "install ninja and cmake first"
$ git clone https://github.com/rust-lang/rust.git -b 1.97.1

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[package]
name = "boxany"
version = "0.1.0"
edition = "2024"

[dependencies]

[build-dependencies]
cc = "1.0"

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package main

import (
	"flag"
	"fmt"
	"io"
	"log"
	"os"
	"os/exec"
	"path/filepath"

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-- This module serves as the root of the `Json` library.
-- Import modules here that should be built as part of the library.

import Std

inductive Json where
  | null : Json
  | bool (b: Bool)
  | number (n: Int)
  | array (a: List Json)

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from abc import ABC, abstractmethod
from typing import Callable, Generic, Iterable, Iterator, Optional, Tuple, TypeVar, Union

T = TypeVar('T')
U = TypeVar('U')

class Functor(ABC, Generic[T]):
    @abstractmethod
    def fmap(self, f: Callable[[T], U]) -> 'Functor[U]':
        raise NotImplemented

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Parsers and DOM

• xml-rs: roughly XML 1.0, low-level StAX-style streaming parser; no DTD validation;
  • serde-xml-rs builds on xml-rs
• xmlparser: very similar to xml-rs
• quick-xml: almost zero-copy,
  • xml_dom builds on it.
• roxmltree: a read-only zero-copy "DOM" based on the source data. Not streaming? XML 1.0.
• rxml: "alpha-quality" restricted SAX parsing of XML 1.0 with namespacing.
  • minidom builds on it, focused on xmpp

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/// This is an example of encoding state of a Builder 
/// into a const generic bitmask. [`PipelineBuilder`]
/// only allows `.build()` when all of the fields have
/// been set.

/// This requires a scary nightly feature that rustc 
/// marks with a stark warning:
/// ```ignore
/// the feature `generic_const_exprs` is incomplete
/// and may not be safe to use and/or cause compiler crashes

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#!/usr/bin/env python3

"""
A swaybar implementation.
Current plugins:
- keyboard layout state and tracking
- PulseAudio-compatible sound: device, volume and mute status
- power supply: on battery/ac, percentage, time to emtpy/full
- network: the name of the primary connection, `nmmenu` on click
- time in different formats

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#coding

We all know that 5 % 3 is 2 (I use % as the modulo operation sign). What about -5 % 3 or -5 % -3 in your favorite programming language?

Turns out, there are different answers.

Python

>>> 5 % 3

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#!/usr/bin/env python3

"""
This is a driver for Gravity 16x2 LCD (single-color, not RGB) for Raspberry Pi.

It is tested on Raspberry Pi Zero W with
- i2c_arm,baudrate=100000
- i2c_arm,baudrate=400000
- dtoverlay=i2c-gpio,bus=3,i2c_gpio_delay_us=1
"""