我有一个Rust的追踪:
thread 'main' panicked at 'failed printing to stdout: Broken pipe (os error 32)', library/std/src/io/stdio.rs:993:9
stack backtrace:
0: 0x559ffa959dc0 - std::backtrace_rs::backtrace::libunwind::trace::h72c2fb8038f1bbee
at /rustc/7eac88abb2e57e752f3302f02be5f3ce3d7adfb4/library/std/src/../../backtrace/src/backtrace/libunwind.rs:96
1: 0x559ffa959dc0 - std::backtrace_rs::backtrace::trace_unsynchronized::h1e3b084883f1e78c
at /rustc/7eac88abb2e57e752f3302f02be5f3ce3d7adfb4/library/std/src/../../backtrace/src/backtrace/mod.rs:66
2: 0x559ffa959dc0 - std::sys_common::backtrace::_print_fmt::h3bf6a7ebf7f0394a
at /rustc/7eac88abb2e57e752f3302f02be5f3ce3d7adfb4/library/std/src/sys_common/backtrace.rs:79
3: 0x559ffa959dc0 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h2e8cb764b7fe02e7
at /rustc/7eac88abb2e57e752f3302f02be5f3ce3d7adfb4/library/std/src/sys_common/backtrace.rs:58
4: 0x559ffa972f6c - core::fmt::write::h7a1184eaee6a8644
at /rustc/7eac88abb2e57e752f3302f02be5f3ce3d7adfb4/library/core/src/fmt/mod.rs:1080
5: 0x559ffa957b12 - std::io::Write::write_fmt::haeeb374d93a67eac
at /rustc/7eac88abb2e57e752f3302f02be5f3ce3d7adfb4/library/std/src/io/mod.rs:1516
6: 0x559ffa95beed - std::sys_common::backtrace::_print::h1d14a7f6ad632dc8
at /rustc/7eac88abb2e57e752f3302f02be5f3ce3d7adfb4/library/std/src/sys_common/backtrace.rs:61
7: 0x559ffa95beed - std::sys_common::backtrace::print::h301abac8bb2e3e81
at /rustc/7eac88abb2e57e752f3302f02be5f3ce3d7adfb4/library/std/src/sys_common/backtrace.rs:48
8: 0x559ffa95beed - std::panicking::default_hook::{{closure}}::hde0cb80358a6920a
at /rustc/7eac88abb2e57e752f3302f02be5f3ce3d7adfb4/library/std/src/panicking.rs:208
9: 0x559ffa95bb98 - std::panicking::default_hook::h9b1a691049a0ec8f
at /rustc/7eac88abb2e57e752f3302f02be5f3ce3d7adfb4/library/std/src/panicking.rs:227
10: 0x559ffa95c5d1 - std::panicking::rust_panic_with_hook::h2bdec87b60580584
at /rustc/7eac88abb2e57e752f3302f02be5f3ce3d7adfb4/library/std/src/panicking.rs:577
11: 0x559ffa95c179 - std::panicking::begin_panic_handler::{{closure}}::h101ca09d9df5db47
at /rustc/7eac88abb2e57e752f3302f02be5f3ce3d7adfb4/library/std/src/panicking.rs:484
12: 0x559ffa95a22c - std::sys_common::backtrace::__rust_end_short_backtrace::h3bb85654c20113ca
at /rustc/7eac88abb2e57e752f3302f02be5f3ce3d7adfb4/library/std/src/sys_common/backtrace.rs:153
13: 0x559ffa95c139 - rust_begin_unwind
at /rustc/7eac88abb2e57e752f3302f02be5f3ce3d7adfb4/library/std/src/panicking.rs:483
14: 0x559ffa95c0eb - std::panicking::begin_panic_fmt::hf0503558fbe5b251
at /rustc/7eac88abb2e57e752f3302f02be5f3ce3d7adfb4/library/std/src/panicking.rs:437
15: 0x559ffa957022 - std::io::stdio::print_to::h9435376f36962f3f
at /rustc/7eac88abb2e57e752f3302f02be5f3ce3d7adfb4/library/std/src/io/stdio.rs:993
16: 0x559ffa957022 - std::io::stdio::_print::h0d31d4b9faa6e1ec
at /rustc/7eac88abb2e57e752f3302f02be5f3ce3d7adfb4/library/std/src/io/stdio.rs:1005
17: 0x559ffa944807 - wordstats::main::h1c2ea6400047a5eb
18: 0x559ffa942e73 - std::sys_common::backtrace::__rust_begin_short_backtrace::h9e31cf87ddc88116
19: 0x559ffa942e49 - std::rt::lang_start::{{closure}}::h6c6491f05894818f
20: 0x559ffa95c9f7 - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::he179d32a5d10d957
at /rustc/7eac88abb2e57e752f3302f02be5f3ce3d7adfb4/library/core/src/ops/function.rs:259
21: 0x559ffa95c9f7 - std::panicking::try::do_call::hcb3d5e7be089b2b4
at /rustc/7eac88abb2e57e752f3302f02be5f3ce3d7adfb4/library/std/src/panicking.rs:381
22: 0x559ffa95c9f7 - std::panicking::try::h7ac93b0cd56fb701
at /rustc/7eac88abb2e57e752f3302f02be5f3ce3d7adfb4/library/std/src/panicking.rs:345
23: 0x559ffa95c9f7 - std::panic::catch_unwind::h7b40e396c93a4fcd
at /rustc/7eac88abb2e57e752f3302f02be5f3ce3d7adfb4/library/std/src/panic.rs:382
24: 0x559ffa95c9f7 - std::rt::lang_start_internal::h142b9cc66267fea1
at /rustc/7eac88abb2e57e752f3302f02be5f3ce3d7adfb4/library/std/src/rt.rs:51
25: 0x559ffa944ae2 - main
26: 0x7f6223a380b3 - __libc_start_main
27: 0x559ffa94209e - _start
28: 0x0 - <unknown>
当我编译这个程序时。
use diacritics;
use std::collections::HashMap;
use std::io;
use std::io::prelude::*;
#[derive(Debug)]
struct Entry {
word: String,
count: u32,
}
static SEPARATORS: &'static [char] = &[
' ', ',', '.', '!', '?', '\'', '"', '\n', '(', ')', '#', '{', '}', '[', ']', '-', ';', ':',
];
fn main() {
let mut words: HashMap<String, u32> = HashMap::new();
let stdin = io::stdin();
for line in stdin.lock().lines() {
line_processor(line.unwrap(), &mut words)
}
output(&mut words);
}
fn line_processor(line: String, words: &mut HashMap<String, u32>) {
let formatted_line;
let mut word = String::new();
formatted_line = diacritics::remove_diacritics(&line).to_lowercase();
for c in formatted_line.chars() {
if SEPARATORS.contains(&c) {
add_word(word, words);
word = String::new();
} else {
word.push_str(&c.to_string());
}
}
}
fn add_word(word: String, words: &mut HashMap<String, u32>) {
if word.len() > 0 {
if words.contains_key::<str>(&word) {
words.insert(word.to_string(), words.get(&word).unwrap() + 1);
} else {
words.insert(word.to_string(), 1);
}
// println!("word >{}<", word.to_string())
}
}
fn output(words: &mut HashMap<String, u32>) {
let mut stack = Vec::<Entry>::new();
for (k, v) in words {
stack.push(Entry {
word: k.to_string(),
count: *v,
});
}
stack.sort_by(|a, b| b.count.cmp(&a.count));
stack.reverse();
while let Some(entry) = stack.pop() {
println!("{}\t{}", entry.count, entry.word);
}
}
这样做:
cargo build --release
我这样运行程序:
cat src/sample.txt | ./target/release/wordstats | head -n 50
这个程序应该只显示类似于这样的内容(顶部单词计数),没有任何痕迹:
15 the
14 in
11 are
10 and
10 of
9 species
9 bats
8 horseshoe
8 is
6 or
6 as
5 which
5 their
这是一些回显内容或其他文件(例如
cat src/main.rs | ...
),但不适用于此文件内容,该文件是随机维基百科页面的一部分。我的程序是一个愚蠢的单词计数器,只打印一个排序后的键值对列表。
当我将结果传递给
head -n 50
程序时,问题就会出现,但是当我打印完整的输出时,则没有问题。有任何想法为什么会出现这样的跟踪? 我在程序中是否处理了错误的事情还是与其他某些事情有关(rust lib / unix 行为不当)?
我的rustc版本是:
rustc 1.48.0 (7eac88abb 2020-11-16)
编辑:添加缺少的Cargo.toml
[package]
name = "wordstats"
version = "0.1.0"
authors = ["Eric Régnier <utopman@gmail.com>"]
edition = "2018"
[dependencies]
diacritics = "0.1.1"