Why does this not compile? If I inline the get_display function (see comments) it works

faulty.rs

use esp_idf_hal::{
    gpio::{InputPin, OutputPin},
    i2c::{self, I2cDriver},
};
use shared_bus::{BusManager, I2cProxy, NullMutex};
use ssd1306::{
    mode::BufferedGraphicsMode, prelude::I2CInterface, size::DisplaySize128x64, Ssd1306,
};

type SharedBus<'a> = BusManager<NullMutex<I2cDriver<'a>>>;
type Bus<'a> = I2cProxy<'a, NullMutex<I2cDriver<'a>>>;

type Display<'a> =
    Ssd1306<I2CInterface<Bus<'a>>, DisplaySize128x64, BufferedGraphicsMode<DisplaySize128x64>>;

fn get_bus<SDA: InputPin + OutputPin, SCL: InputPin + OutputPin>(
    _i2c: i2c::I2C0,
    _scl: SCL,
    _sda: SDA,
) -> Result<SharedBus<'static>, String> {
    Err("oops".to_string())
}

fn get_display<'a>(_bus: Bus<'a>, _address: u8) -> Result<Display<'a>, String> {
    Err("oops".to_string())
}

pub const NUM_DISPLAYS: usize = 2;

pub fn connect(
    i2c: i2c::I2C0,
    scl: impl InputPin + OutputPin + 'static,
    sda: impl InputPin + OutputPin + 'static,
) {
    let bus = get_bus(i2c, scl, sda).unwrap();

    // let bus0 = bus.acquire_i2c();
    // let display0 = {
    //     let di = ssd1306::I2CDisplayInterface::new_custom_address(bus0, 0x3c);

    //     let mut display = ssd1306::Ssd1306::new(
    //         di,
    //         ssd1306::size::DisplaySize128x64,
    //         ssd1306::rotation::DisplayRotation::Rotate0,
    //     )
    //     .into_buffered_graphics_mode();

    //     display
    // };

    // let bus1 = bus.acquire_i2c();
    // let display1 = {
    //     let di = ssd1306::I2CDisplayInterface::new_custom_address(bus1, 0x3c);

    //     let mut display = ssd1306::Ssd1306::new(
    //         di,
    //         ssd1306::size::DisplaySize128x64,
    //         ssd1306::rotation::DisplayRotation::Rotate0,
    //     )
    //     .into_buffered_graphics_mode();

    //     display
    // };

    let display0 = get_display(bus.acquire_i2c(), 0x3C).unwrap();
    let display1 = get_display(bus.acquire_i2c(), 0x3D).unwrap();

    let mut displays: [_; NUM_DISPLAYS] = [display0, display1];
}

gistfile1.txt

error[E0597]: `bus` does not live long enough
  --> src/faulty.rs:66:32
   |
66 |     let display1 = get_display(bus.acquire_i2c(), 0x3D).unwrap();
   |                                ^^^^^^^^^^^^^^^^^
   |                                |
   |                                borrowed value does not live long enough
   |                                argument requires that `bus` is borrowed for `'static`
...
69 | }
   | - `bus` dropped here while still borrowed

For more information about this error, try `rustc --explain E0597`.