Segfault reproducer for rust-lang/rust#107261

Author: gergoerdi

.cargo/config

@@ -0,0 +1,9 @@
+[build]
+target = "avr-atmega32u4.json"
+rustflags = ["--emit=llvm-bc"]
+
+[unstable]
+build-std = ["core"]
+
+[env]
+AVR_CPU_FREQUENCY_HZ = "16_000_000"

.gitignore

@@ -0,0 +1 @@
+target

Cargo.lock

@@ -0,0 +1,12 @@
+[package]
+name = "worduino-avr"
+version = "0.1.0"
+authors = ["Gergő ÉRDI <gergo@erdi.hu>"]
+
+[dependencies]
+avr-config = "2.0.1"
+avr-std-stub = "1.0"
+worduino-engine = { path = "worduino-engine" }
+
+[profile.release]
+lto = true

Cargo.toml

@@ -0,0 +1,31 @@
+{
+  "arch": "avr",
+  "cpu": "atmega32u4",
+  "data-layout": "e-P1-p:16:8-i8:8-i16:8-i32:8-i64:8-f32:8-f64:8-n8-a:8",
+  "env": "",
+  "executables": true,
+  "linker": "avr-gcc",
+  "linker-flavor": "gcc",
+  "linker-is-gnu": true,
+  "llvm-target": "avr-unknown-unknown",
+  "os": "unknown",
+  "position-independent-executables": false,
+  "exe-suffix": ".elf",
+  "eh-frame-header": false,
+  "pre-link-args": {
+    "gcc": [
+      "-Os",
+      "-mmcu=atmega32u4"
+    ]
+  },
+  "late-link-args": {
+    "gcc": [
+      "-lc",
+      "-lgcc"
+    ]
+  },
+  "target-c-int-width": "16",
+  "target-endian": "little",
+  "target-pointer-width": "16",
+  "vendor": "unknown"
+}

avr-atmega32u4.json

@@ -0,0 +1,47 @@
+#![feature(abi_avr_interrupt)]
+#![feature(core_intrinsics)]
+#![feature(asm_experimental_arch)]
+
+#![no_std]
+#![no_main]
+
+extern crate avr_std_stub;
+extern crate worduino_engine as worduino;
+
+use worduino::*;
+
+struct ArduboyPeripherals {
+    pub framebuffer: [[u8; SCREEN_WIDTH as usize]; SCREEN_HEIGHT as usize / 8],
+}
+
+impl ArduboyPeripherals {
+    fn new() -> ArduboyPeripherals {
+        ArduboyPeripherals {
+            framebuffer: [[0; SCREEN_WIDTH as usize]; SCREEN_HEIGHT as usize / 8],
+        }
+    }
+}
+
+impl Peripherals for ArduboyPeripherals {
+    fn get_button(&self) -> bool {
+        false
+    }
+
+    fn get_stripe(&self, x: u8, stripe: u8) -> u8 {
+        0x00
+    }
+
+    fn set_stripe(&mut self, x: u8, stripe: u8, val: u8) {
+        self.framebuffer[stripe as usize][x as usize] = val;
+    }
+}
+
+#[no_mangle]
+pub extern fn main() {
+    let peripherals = ArduboyPeripherals::new();
+    let mut engine = Engine::new(peripherals);
+
+    loop {
+        engine.step();
+    }
+}

src/main.rs

@@ -0,0 +1 @@
+target

worduino-engine/.gitignore

@@ -0,0 +1,7 @@
+[package]
+name = "worduino-engine"
+version = "0.1.0"
+authors = ["Gergő ÉRDI <gergo@erdi.hu>"]
+
+[dependencies]
+avr-progmem = { version = "0.3.2", default-features = false, features = ["unsize"] }