Error from syntax checker rust-cargo: JSON readtable error

Question

Error from syntax checker rust-cargo: JSON readtable error

opened this issue 6 years ago · comments

Syntax checkers for buffer main.rs in rust-mode:

  rust-cargo
    - may enable:  yes
    - predicate:   t
    - executable:  Found at /Users/zwb/.cargo/bin/cargo
    - Cargo.toml:  Found
    - Crate type:  bin
    - Binary name: iron-gcd

  rust
    - may enable: yes
    - predicate:  t
    - executable: Found at /Users/zwb/.cargo/bin/rustc

  rust-clippy (disabled)
    - may enable: Automatically disabled!
    - predicate:  t
    - executable: Found at /Users/zwb/.cargo/bin/cargo
    - Clippy:     Cannot find the `cargo clippy' command
    - Cargo.toml: Found

Flycheck Mode is enabled. Use SPC u C-c ! x to enable disabled checkers.

--------------------

Flycheck version: 32snapshot
Emacs version:    25.3.1
System:           x86_64-apple-darwin17.3.0
Window system:    mac

fmdkdd · Answer 1 · Thu Apr 12 2018 17:06:36 GMT+0800 (China Standard Time)

Thanks, but we are going to need a bit more information in order to pinpoint the problem.

Can you run M-x flycheck-compile rust-cargo RET with the buffer where you have this error and report its output?

Also, please report your cargo and rustc version.

Wenbo Zhang · Answer 2 · Thu Apr 12 2018 18:15:44 GMT+0800 (China Standard Time)

@fmdkdd Thank you, below is the info:

cargo 0.25.0-nightly (a88fbace4 2017-12-29)
rustc 1.25.0-nightly (73ac5d6a8 2018-01-11)

I run M-x flycheck-compile rust-cargo RET get

-*- mode: compilation; default-directory: "~/Documents/rust/rust-recipes/pr/ch01/mandelbrot/" -*-
Compilation started at Thu Apr 12 18:13:42

cargo test --no-run --bin mandelbrot --message-format\=json
warning: custom registry support via the `registry.index` configuration is being removed, this functionality will not work in the future
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    Finished dev [unoptimized + debuginfo] target(s) in 0.59 secs

Compilation finished at Thu Apr 12 18:13:43

fmdkdd · Answer 3 · Thu Apr 12 2018 19:41:58 GMT+0800 (China Standard Time)

I can't reproduce the JSON readtable error. If I call (flycheck-parse-json) on the output returned by cargo test you give, it parses fine.

I tried to clone your rust-recipes directory, and syntax checking is working fine when opening mandelbrot/src/main.rs or iron-gcd/src/main.rs.

Can you give me exact steps that trigger the error on your side?

Wenbo Zhang · Answer 4 · Thu Apr 12 2018 19:46:06 GMT+0800 (China Standard Time)

@fmdkdd I use https://github.com/hlissner/doom-emacs/tree/develop . After I open mandelbrot/src/main.rs and move cursor, minibuffer will give this error info.

Wenbo Zhang · Answer 5 · Thu Apr 12 2018 19:52:16 GMT+0800 (China Standard Time)

@fmdkdd Open main.rs，enter Ctrl-g will reproduce this.

Wenbo Zhang · Answer 6 · Thu Apr 12 2018 19:56:32 GMT+0800 (China Standard Time)

Below is the config (def-packages encapsulate use-package):

(def-package! rust-mode
  :mode "\\.rs$"
  :config
  (set! :env "RUST_SRC_PATH")
  (set! :docset 'rust-mode "Rust")
  (setq rust-indent-method-chain t)

  (map! :map rust-mode-map
        :localleader
        :n "b" #'+rust/build-menu)
  (def-menu! +rust/build-menu
    "TODO"
    '(("cargo run"   :exec "cargo run --color always")
      ("cargo build" :exec "cargo build --color always")
      ("cargo test"  :exec "cargo test --color always"))
    :prompt "Cargo: "))


(def-package! racer
  :after rust-mode
  :config
  (add-hook! 'rust-mode-hook #'(eldoc-mode racer-mode))
  (set! :lookup 'rust-mode
    :definition #'racer-find-definition
    :documentation #'racer-describe))


(def-package! company-racer
  :when (featurep! :completion company)
  :after racer
  :config (set! :company-backend 'rust-mode '(company-racer)))


(def-package! flycheck-rust
  :when (featurep! :feature syntax-checker)
  :after rust-mode
  :hook (flycheck-mode . flycheck-rust-setup)
  :init (add-hook 'rust-mode-hook #'flycheck-mode))

Wenbo Zhang · Answer 7 · Thu Apr 12 2018 23:25:00 GMT+0800 (China Standard Time)

@hlissner Would you please to see this issue?

Henrik Lissner · Answer 8 · Fri Apr 13 2018 06:16:23 GMT+0800 (China Standard Time)

@ethercflow I cannot reproduce this on Doom either. Can you invoke a backtrace? e.g. M-x toggle-debug-on-error and trigger the error, then copy the backtrace here.

Wenbo Zhang · Answer 9 · Fri Apr 13 2018 13:10:22 GMT+0800 (China Standard Time)

@hlissner Thank you for your help. Below is the backtrace.

Debugger entered--Lisp error: (json-readtable-error)
  signal(json-readtable-error nil)
  json-read()
  flycheck-rust-cargo-metadata()
  flycheck-rust-cargo-workspace-root()
  #[257 "\300 \301\302\303\304\305\306��!\307\"\310\311%\312�!\"\207" [flycheck-rust-cargo-workspace-root seq-do make-byte-code 257 "\211\302H	>\204��\303\304\305�D\"\210\211\211\306\307�\302H	>\204#�\303\304\305��D\"\210�\306H\300\"I\207" vconcat vector [cl-struct-flycheck-error-tags 0 signal wrong-type-argument flycheck-error 3 expand-file-name] 9 "\n\n(fn ERR)" flycheck-rust-error-filter] 9 "\n\n(fn ERRORS)"](nil)
  flycheck-filter-errors(nil rust-cargo)
  flycheck-finish-current-syntax-check(nil "~/Documents/rust/rust-recipes/pr/ch01/mandelbrot/")
  flycheck-report-buffer-checker-status([cl-struct-flycheck-syntax-check #<buffer main.rs> rust-cargo #<process flycheck-rust-cargo> "~/Documents/rust/rust-recipes/pr/ch01/mandelbrot/"] finished nil)
  apply(flycheck-report-buffer-checker-status [cl-struct-flycheck-syntax-check #<buffer main.rs> rust-cargo #<process flycheck-rust-cargo> "~/Documents/rust/rust-recipes/pr/ch01/mandelbrot/"] (finished nil))
  #[128 "\301\302\300�#\207" [[cl-struct-flycheck-syntax-check #<buffer main.rs> rust-cargo #<process flycheck-rust-cargo> "~/Documents/rust/rust-recipes/pr/ch01/mandelbrot/"] apply flycheck-report-buffer-checker-status] 5 "\n\n(fn &rest ARGS)"](finished nil)
  flycheck-finish-checker-process(rust-cargo 0 nil "warning: custom registry support via the `registry.index` configuration is being removed, this functionality will not work in the future\n{\"features\":[],\"filenames\":[\"/Users/zwb/Documents/rust/rust-recipes/pr/ch01/mandelbrot/target/debug/deps/libadler32-a632edcd261c3f33.rlib\"],\"fresh\":true,\"package_id\":\"adler32 1.0.2 (registry+https://mirrors.ustc.edu.cn/crates.io-index/)\",\"profile\":{\"debug_assertions\":true,\"debuginfo\":2,\"opt_level\":\"0\",\"overflow_checks\":true,\"test\":false},\"reason\":\"compiler-artifact\",\"target\":{\"crate_types\":[\"lib\"],\"kind\":[\"lib\"],\"name\":\"adler32\",\"src_path\":\"/Users/zwb/.cargo/registry/src/mirrors.ustc.edu.cn-b63e9dae659fc205/adler32-1.0.2/src/lib.rs\"}}\n{\"features\":[],\"filenames\":[\"/Users/zwb/Documents/rust/rust-recipes/pr/ch01/mandelbrot/target/debug/build/rayon-core-1aed84e0ba13802b/build-script-build\"],\"fresh\":true,\"package_id\":\"rayon-core 1.4.0 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(path+file:///Users/zwb/Documents/rust/rust-recipes/pr/ch01/mandelbrot)\",\"profile\":{\"debug_assertions\":true,\"debuginfo\":2,\"opt_level\":\"0\",\"overflow_checks\":true,\"test\":true},\"reason\":\"compiler-artifact\",\"target\":{\"crate_types\":[\"bin\"],\"kind\":[\"bin\"],\"name\":\"mandelbrot\",\"src_path\":\"/Users/zwb/Documents/rust/rust-recipes/pr/ch01/mandelbrot/src/main.rs\"}}\n    Finished dev [unoptimized + debuginfo] target(s) in 0.0 secs\n" #[128 "\301\302\300�#\207" [[cl-struct-flycheck-syntax-check #<buffer main.rs> rust-cargo #<process flycheck-rust-cargo> "~/Documents/rust/rust-recipes/pr/ch01/mandelbrot/"] apply flycheck-report-buffer-checker-status] 5 "\n\n(fn &rest ARGS)"] "~/Documents/rust/rust-recipes/pr/ch01/mandelbrot/")
  flycheck-handle-signal(#<process flycheck-rust-cargo> "finished\n")

fmdkdd · Answer 10 · Fri Apr 13 2018 16:58:56 GMT+0800 (China Standard Time)

Ah, I think I know what's going on. @ethercflow can you run cargo metadata --no-deps --format-version 1 in your mandelbrot project?

Wenbo Zhang · Answer 11 · Fri Apr 13 2018 18:36:18 GMT+0800 (China Standard Time)

@fmdkdd Cool

warning: custom registry support via the `registry.index` configuration is being removed, this functionality will not work in the future
{"packages":[{"name":"mandelbrot","version":"0.1.0","id":"mandelbrot 0.1.0 (path+file:///Users/zwb/Documents/rust/rust-recipes/pr/ch01/mandelbrot)","license":null,"license_file":null,"description":null,"source":null,"dependencies":[{"name":"crossbeam","source":"registry+https://mirrors.ustc.edu.cn/crates.io-index/","req":"^0.2.8","kind":null,"optional":false,"uses_default_features":true,"features":[],"target":null},{"name":"image","source":"registry+https://mirrors.ustc.edu.cn/crates.io-index/","req":"^0.13.0","kind":null,"optional":false,"uses_default_features":true,"features":[],"target":null},{"name":"num","source":"registry+https://mirrors.ustc.edu.cn/crates.io-index/","req":"^0.1.27","kind":null,"optional":false,"uses_default_features":true,"features":[],"target":null}],"targets":[{"kind":["bin"],"crate_types":["bin"],"name":"mandelbrot","src_path":"/Users/zwb/Documents/rust/rust-recipes/pr/ch01/mandelbrot/src/main.rs"}],"features":{},"manifest_path":"/Users/zwb/Documents/rust/rust-recipes/pr/ch01/mandelbrot/Cargo.toml"}],"workspace_members":["mandelbrot 0.1.0 (path+file:///Users/zwb/Documents/rust/rust-recipes/pr/ch01/mandelbrot)"],"resolve":null,"target_directory":"/Users/zwb/Documents/rust/rust-recipes/pr/ch01/mandelbrot/target","version":1

fmdkdd · Answer 12 · Fri Apr 13 2018 21:00:45 GMT+0800 (China Standard Time)

Yes, so that first line warning: custom registry ... is not JSON, and we should ignore it when parsing. That's a bug on our side, that we didn't catch until now because that warning comes from your Cargo configuration.

I've sent a patch. Thanks for the report!

Wenbo Zhang · Answer 13 · Fri Apr 13 2018 21:32:15 GMT+0800 (China Standard Time)

@fmdkdd Perfect! I update my local flycheck.el, and it works very well!