Printing / Formatting f64 crashes #136
Description
This code
#![no_std]
#![no_main]
use esp32_hal::{clock::ClockControl, pac::Peripherals, prelude::*, timer::TimerGroup, RtcCntl};
use esp_backtrace as _;
use esp_println::println;
use xtensa_lx_rt::entry;
#[entry]
fn main() -> ! {
let peripherals = Peripherals::take().unwrap();
let system = peripherals.DPORT.split();
let clocks = ClockControl::boot_defaults(system.clock_control).freeze();
// Disable the RTC and TIMG watchdog timers
let mut rtc_cntl = RtcCntl::new(peripherals.RTC_CNTL);
let timer_group0 = TimerGroup::new(peripherals.TIMG0, &clocks);
let mut wdt0 = timer_group0.wdt;
let timer_group1 = TimerGroup::new(peripherals.TIMG1, &clocks);
let mut wdt1 = timer_group1.wdt;
rtc_cntl.set_wdt_global_enable(false);
wdt0.disable();
wdt1.disable();
println!("Howdy!");
let foo = 3.14f32;
println!("{}", foo * 2f32);
let foo = 3.14f64;
println!("{}", foo * 2f64);
loop {
}
}works correct for debug builds on ESP32 but crashes for release builds like this:
Howdy!
6.28
!! A panic occured in 'C:\Users\Bjoern\.rustup\toolchains\esp\lib\rustlib\src\rust\library\core\src\num\flt2dec\mod.rs', at line 189, column 5
PanicInfo {
payload: Any { .. },
message: Some(
assertion failed: buf[0] > b\'0\',
),
location: Location {
file: "C:\\Users\\Bjoern\\.rustup\\toolchains\\esp\\lib\\rustlib\\src\\rust\\library\\core\\src\\num\\flt2dec\\mod.rs",
line: 189,
col: 5,
},
can_unwind: true,
}
Backtrace:
0x400d7e8e
0x400d7e8e - _ZN4core3num7flt2dec17digits_to_dec_str17heb592f82a70d05d1E
at ??:??
0x400d82e1
0x400d82e1 - _ZN4core3num7flt2dec15to_shortest_str17hb3626511ee59378eE
at ??:??
0x400d6960
0x400d6960 - _ZN4core3fmt5float32float_to_decimal_common_shortest17hfff5f366670e650eE.llvm.14292657683144325728
at ??:??
0x400d69cf
0x400d69cf - _ZN4core3fmt5float52_$LT$impl$u20$core..fmt..Display$u20$for$u20$f64$GT$3fmt17h0efd241b8f8506e7E
at ??:??
0x400d6b12
0x400d6b12 - _ZN4core3fmt5write17hfeac229cab89db3fE
at ??:??
0x400d08fc
0x400d08fc - main
at ??:??
0x400d0b5a
0x400d0b5a - Reset
at ??:??
0x400d0a98
0x400d0a98 - ESP32Reset
at ??:??
This happens on the current (1.63.0.2) version and at least a few older ones