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enhance error codec and exit code by youknowone · Pull Request #6602 · RustPython/RustPython · GitHub
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enhance error codec and exit code #6602

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Merged
youknowone merged 1 commit into from
Dec 31, 2025
Merged

enhance error codec and exit code #6602

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enhance error codec and exit code
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@youknowone
youknowone committed Dec 31, 2025
commit 8cf8029a3487ff8af8f9a3925817e5b31a147be8
23 changes: 19 additions & 4 deletions crates/vm/src/vm/mod.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -327,11 +327,17 @@ impl VirtualMachine {
let line_buffering = buffered_stdio && (isatty || fd == 2);

let newline = if cfg!(windows) { None } else { Some("\n") };
// stderr uses backslashreplace error handler
let errors: Option<&str> = if fd == 2 {
Some("backslashreplace")
} else {
None
};

let stdio = self.call_method(
&io,
"TextIOWrapper",
(buf, (), (), newline, line_buffering, write_through),
(buf, (), errors, newline, line_buffering, write_through),
)?;
let mode = if write { "w" } else { "r" };
stdio.set_attr("mode", self.ctx.new_str(mode), self)?;
Expand Down Expand Up @@ -853,7 +859,13 @@ impl VirtualMachine {
[arg] => match_class!(match arg {
ref i @ PyInt => {
use num_traits::cast::ToPrimitive;
return i.as_bigint().to_u32().unwrap_or(0);
// Try u32 first, then i32 (for negative values), else -1 for overflow
let code = i
.as_bigint()
.to_u32()
.or_else(|| i.as_bigint().to_i32().map(|v| v as u32))
.unwrap_or(-1i32 as u32);
return code;
}
arg => {
if self.is_none(arg) {
Expand All @@ -866,8 +878,11 @@ impl VirtualMachine {
_ => args.as_object().repr(self).ok(),
};
if let Some(msg) = msg {
let stderr = stdlib::sys::PyStderr(self);
writeln!(stderr, "{msg}");
// Write using Python's write() to use stderr's error handler (backslashreplace)
if let Ok(stderr) = stdlib::sys::get_stderr(self) {
let _ = self.call_method(&stderr, "write", (msg,));
let _ = self.call_method(&stderr, "write", ("\n",));
}
}
1
} else if exc.fast_isinstance(self.ctx.exceptions.keyboard_interrupt) {
Expand Down
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