quarto.json.decode does not raise on invalid JSON, so pcall cannot catch it
維護者通常 1 天內回覆
還沒有人認領這個 Issue。
評估
研究方向
從 src/resources/pandoc/datadir/_json.lua 和第 212 行附近的 decode_error 呼叫開始；檢查模組如何從 init.lua 載入，以及 common/log.lua 如何取代全域 error。Issue 提議在載入 _json.lua 時保留 Lua error 的區域參照。完成標準是：解碼和編碼失敗會引發可由 pcall 捕捉的錯誤，同時全域 error 的行為維持不變。
由索引模型根據 Issue 內容生成。
描述
I have:
- searched the issue tracker for similar issues
- installed the latest version of Quarto CLI
- formatted my issue following the Bug Reports guide
Bug description
quarto.json.decode does not raise an error on invalid JSON.
It prints ERROR (...) lines to the console, then returns nil.
A filter that wraps the call in pcall gets ok = true, so it cannot tell that the decode failed, and it cannot keep the lines out of the console.
The cause is in src/resources/filters/common/log.lua.
It replaces the global error with a function that only prints, which affects every Lua filter.
src/resources/pandoc/datadir/_json.lua calls that global error when it reports a decode failure (decode_error, line 212), and when encode meets a value it cannot encode.
A small fix would be for _json.lua to keep its own reference when it loads: local error = error at the top of the file.
init.lua requires _json at line 151, before main.lua imports common/log.lua, so the reference would point to Lua's own error.
quarto.json.decode and quarto.json.encode would then raise as pandoc.json does.
The global stays as it is, so the change has no effect on code that relies on the global error not stopping the render.
Quarto 2 already behaves this way: pcall(quarto.json.decode, 'not json') returns false and JSON decode error: expected ident at line 1 column 2.
Steps to reproduce
repro.lua, in the same directory as the document:
function Meta(meta)
local ok, result = pcall(quarto.json.decode, 'not json')
quarto.log.output('decode: ok=' .. tostring(ok) .. ', result=' .. tostring(result))
ok, result = pcall(error, 'boom')
quarto.log.output('error: ok=' .. tostring(ok) .. ', result=' .. tostring(result))
end
---
title: "pcall and quarto.json.decode"
format: html
filters:
- at: pre-ast
type: lua
path: repro.lua
---
Text.
Run quarto render repro.qmd.
Actual behavior
ERROR (<quarto>/share/pandoc/datadir/_json.lua:212) invalid literal 'not' at line 1 col 1
ERROR (<quarto>/share/pandoc/datadir/_json.lua:212) trailing garbage at line 1 col 5
decode: ok=true, result=nil
ERROR ([C]:-1) boom
error: ok=true, result=nil
Expected behavior
pcall(quarto.json.decode, 'not json') returns false and the error message, and nothing is printed.
The second call shows the global error itself, for context.
Your environment
- Quarto 1.11.8 (also the development build at
2bd9f23c9). - macOS on Apple silicon.
- No IDE involved: rendered from the terminal.
Quarto check output
Quarto 1.11.8
[✓] Checking environment information...
Quarto cache location: /Users/mcanouil/Library/Caches/quarto
Project: none found (single-file mode)
[✓] Checking versions of quarto binary dependencies...
Pandoc version 3.10.0: OK
Dart Sass version 1.101.0: OK
Deno version 2.9.8: OK
Typst version 0.15.1: OK
[✓] Checking versions of quarto dependencies......OK
[✓] Checking Quarto installation......OK
Version: 1.11.8
Path: <quarto>/bin
[✓] Checking tools....................OK
TinyTeX: v2026.07
Chrome Headless Shell: (not installed)
VeraPDF: (not installed)
[✓] Checking LaTeX....................OK
Using: TinyTex
Path: /Users/mcanouil/Library/TinyTeX/bin/universal-darwin
Version: 2026
[✓] Checking Chrome Headless....................OK
Using: Chrome from QUARTO_CHROMIUM
Path: /Applications/Brave Browser.app/Contents/MacOS/Brave Browser
[✓] Checking basic markdown render....OK
[✓] Checking R installation...........OK
Version: 4.6.1
Path: /Library/Frameworks/R.framework/Versions/4.6/Resources
knitr: 1.51
rmarkdown: 2.31
[✓] Checking Knitr engine render......OK
[✓] Checking Python 3 installation....OK
Version: 3.9.6
Path: /Library/Developer/CommandLineTools/usr/bin/python3
Jupyter: (None)
- 主要語言
- JavaScript
- 星號
- 6.1k
- 分支
- 476
- 平均合併
- 16 小時 45 分鐘
- 30 天內合併 PR
- 117
環境準備
- 沒有 Dockerfile 或 Docker Compose 檔案
- 有 Pull Request 範本
- 閱讀貢獻指南
從這裡開始
- 先讀完整個 Issue，再讀專案的貢獻指南。
- 在 Issue 下留言說明你要接手 —— 這能避免兩個人做同樣的事。
- Fork 儲存庫，在一個分支上完成修改。
- 送出 Pull Request，並在描述裡引用這個 Issue 編號。
quarto-dev/quarto-cli 的其他 Issue
-
accessibility bug websites
難度 1/5 1-3 小時 新手友好度 88/100
quarto-dev/quarto-cli#15235 ·
維護者通常 1 天內回覆
-
accessibility bug themes
難度 1/5 1 小時以內 新手友好度 88/100
quarto-dev/quarto-cli#15222 ·
維護者通常 1 天內回覆
-
bug code-annotation
難度 2/5 1-3 小時 新手友好度 76/100
quarto-dev/quarto-cli#15215 ·
維護者通常 1 天內回覆
-
accessibility bug website-navigation
難度 2/5 1-3 小時 新手友好度 83/100
quarto-dev/quarto-cli#15190 ·
維護者通常 1 天內回覆
-
Navbar dropdown toggles have `role="link"`可能已有人在做 @Mittalnew 於 4 天前認領。 未關閉accessibility bug website-navigation
難度 2/5 1-3 小時 新手友好度 88/100
quarto-dev/quarto-cli#15188 · 1 則留言 ·
維護者通常 1 天內回覆
查看 quarto-dev/quarto-cli 的全部 Issue
相似的 Issue
-
enhancement good first issue hacktoberfest help wanted
難度 2/5 1-3 小時 新手友好度 85/100
BinaryBaconLabs/todo-app#18 ·
-
bug
難度 2/5 1-3 小時 新手友好度 88/100
維護者通常 1 天內回覆
-
44-x-y bug :beetle:
難度 1/5 1 小時以內 新手友好度 82/100
electron/electron#55528 · 1 則留言 ·
維護者通常 1 天內回覆
-
難度 1/5 1 小時以內 新手友好度 85/100
react/react-native#59699 ·
維護者通常 2 天內回覆
-
難度 2/5 1-3 小時 新手友好度 68/100