{"record":{"id":"1350900ee5b59b18","repo":"can1357/oh-my-pi","slug":"unterminated-quote-q","errorCode":null,"errorMessage":"Unterminated quote: {q}","messagePattern":"Unterminated quote: (.+?)","errorType":"validation","errorClass":"io::Error (ErrorKind::InvalidInput)","httpStatus":null,"severity":"error","filePath":"crates/pi-builtins/src/xargs.rs","lineNumber":538,"sourceCode":"\t\t}\n\n\t\tlet mut escape: Option<Escape> = None;\n\t\tlet mut i = 0;\n\t\tloop {\n\t\t\tif i == pending.len() {\n\t\t\t\tpending.resize(4096, 0);\n\t\t\t\t// Already hit the end of our buffer, so read in some more data.\n\t\t\t\tlet bytes_read = loop {\n\t\t\t\t\tmatch self.rd.read(host, &mut pending[..]) {\n\t\t\t\t\t\tOk(bytes_read) => break bytes_read,\n\t\t\t\t\t\tErr(e) if e.kind() == io::ErrorKind::Interrupted => continue,\n\t\t\t\t\t\tErr(e) => return Err(e),\n\t\t\t\t\t}\n\t\t\t\t};\n\n\t\t\t\tif bytes_read == 0 {\n\t\t\t\t\tif let Some(Escape::Quote(q)) = &escape {\n\t\t\t\t\t\treturn Err(io::Error::new(\n\t\t\t\t\t\t\tio::ErrorKind::InvalidInput,\n\t\t\t\t\t\t\tformat!(\"Unterminated quote: {q}\"),\n\t\t\t\t\t\t));\n\t\t\t\t\t}\n\t\t\t\t\tif i == 0 {\n\t\t\t\t\t\treturn Ok(None);\n\t\t\t\t\t}\n\t\t\t\t\tpending.clear();\n\t\t\t\t\tbreak;\n\t\t\t\t}\n\n\t\t\t\tpending.resize(bytes_read, 0);\n\t\t\t\ti = 0;\n\t\t\t}\n\n\t\t\tmatch (&escape, pending[i]) {\n\t\t\t\t(Some(Escape::Quote(quote)), c) if c == *quote => escape = None,\n\t\t\t\t(Some(Escape::Quote(_)), c) => result.push(c),","sourceCodeStart":520,"sourceCodeEnd":556,"githubUrl":"https://github.com/can1357/oh-my-pi/blob/969062200754ea02cfac922e5ebb8c608c079e15/crates/pi-builtins/src/xargs.rs#L520-L556","documentation":"pi-builtins' xargs implementation tokenizes its input (stdin or a file) with shell-like quoting: an opening `\"` or `'` starts a quoted region whose matching close quote must appear before end-of-input. When the reader reaches EOF while still inside a quoted region, it raises this InvalidInput io::Error instead of silently producing a mangled argument, mirroring real xargs/shell behavior where an unclosed quote is a hard input error.","triggerScenarios":"Feeding xargs input via stdin or InputSource::Reader where a quote character (\" or ') is opened and the input stream ends (bytes_read == 0) before the matching closing quote is read — e.g. a truncated pipe, a file cut off mid-line, or text pasted with a missing closing quote.","commonSituations":"Piping partially-written output from another process (producer killed mid-stream), copying a file list from an editor with an unbalanced quote, generated argument files with embedded apostrophes in filenames (e.g. \"it's.txt\") that weren't escaped, or a here-document/redirect that got truncated.","solutions":["Fix the input so every quote character is balanced — check the last line of the piped/file input for an unmatched \" or ' before it reaches xargs.","Escape embedded quote characters with a backslash (e.g. it\\'s.txt) instead of relying on raw quotes in the input stream.","Ensure the upstream producer finished writing and closed the stream correctly; a truncated pipe (SIGPIPE, crash) leaves the quote unterminated.","Pre-process the input to strip or requote problematic filenames, e.g. with `printf '%q\\n'` or a null-delimited producer (`find -print0 | xargs -0`) when supported."],"exampleFix":"// before: unbalanced quote in piped input\necho \"file1 'file2 | xargs pi-xargs\n// error: Unterminated quote: '\n\n// after: balanced quotes / escaped embedded quote\necho \"file1 'file2'\" | xargs pi-xargs\n// or: echo \"it\\\\'s.txt\" | xargs pi-xargs","handlingStrategy":"validation","validationCode":"function validateXargsInput(input) {\n  let quote = null;\n  for (const ch of input) {\n    if (quote) { if (ch === quote) quote = null; }\n    else if (ch === '\"' || ch === \"'\") quote = ch;\n    else if (ch === '\\\\') continue; // next char escaped\n  }\n  if (quote) throw new Error(`Input has unterminated ${quote} before xargs`);\n}","typeGuard":null,"tryCatchPattern":"try {\n  await runXargs(input);\n} catch (err) {\n  if (err instanceof Error && /Unterminated quote/.test(err.message)) {\n    console.error('Fix the unbalanced quote in the piped input and retry');\n  } else {\n    throw err;\n  }\n}","preventionTips":["Generate xargs input from producers that emit one safely-quoted record per line (printf '%q\\n') or NUL-delimited output (find -print0 | xargs -0).","Never hand-write pipelines that embed filenames containing quotes or apostrophes without escaping.","Check producer exit codes before piping so a truncated stream never reaches xargs."],"tags":["input-parsing","quoting","shell","io"],"backgroundTag":"unterminated-quote","analyzedSha":"969062200754ea02cfac922e5ebb8c608c079e15","analyzedAt":"2026-08-31T10:29:35.737Z","schemaVersion":2},"datasetVersion":"2026-08-31T14:17:45.589Z"}