GNU bug report logs - #46203
28.0.50; flymake doesn't start in java-mode; here is debugger output

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Pankaj Jangid <pankaj <at> codeisgreat.org>
To: bug-gnu-emacs <at> gnu.org
Subject: 28.0.50; flymake doesn't start in java-mode; here is debugger output
Date: Sun, 31 Jan 2021 11:03:20 +0530

1. Start Emacs with -Q flag.
2. (setq debug-on-error t)
3. Open a .java file
4. M-x flymake-mode
5. Move point

Produces this debugger output:

--8<---------------cut here---------------start------------->8---
Debugger entered--Lisp error: (file-missing "Removing directory" "No such file or directory" "/private/var/folders/lf/kn5fshdx4md8xcmv02rntfzr00...")
  signal(file-missing ("Removing directory" "No such file or directory" "/private/var/folders/lf/kn5fshdx4md8xcmv02rntfzr00..."))
  files--force(nil delete-directory-internal "/private/var/folders/lf/kn5fshdx4md8xcmv02rntfzr00...")
  delete-directory("/private/var/folders/lf/kn5fshdx4md8xcmv02rntfzr00...")
  flymake-proc--safe-delete-directory("/private/var/folders/lf/kn5fshdx4md8xcmv02rntfzr00...")
  flymake-proc--delete-temp-directory("/private/var/folders/lf/kn5fshdx4md8xcmv02rntfzr00...")
  flymake-proc-simple-java-cleanup()
  #f(compiled-function () #<bytecode 0xc1e366f71c32823>)()
  flymake-proc-legacy-flymake(#f(compiled-function (&rest args) #<bytecode 0x1246cb41db097b05>))
  apply(flymake-proc-legacy-flymake #f(compiled-function (&rest args) #<bytecode 0x1246cb41db097b05>) nil)
  flymake--run-backend(flymake-proc-legacy-flymake nil)
  #f(compiled-function (backend) #<bytecode -0x1596ab80e3b651ab>)(flymake-proc-legacy-flymake)
  run-hook-wrapped(#f(compiled-function (backend) #<bytecode -0x1596ab80e3b651ab>) flymake-proc-legacy-flymake)
  flymake-start((on-display) nil)
  #f(compiled-function () #<bytecode -0x112feb3c13c972cf>)()
--8<---------------cut here---------------end--------------->8---



In GNU Emacs 28.0.50 (build 1, x86_64-apple-darwin20.2.0, NS appkit-2022.20 Version 11.1 (Build 20C69))
 of 2021-01-31 built on mb2.local
Repository revision: 0f2d87716a2cb6fae5ea6719763441c448fe7a74
Repository branch: master
Windowing system distributor 'Apple', version 10.3.2022
System Description:  macOS 11.1

Configured features:
ACL DBUS GIF GLIB GMP GNUTLS JPEG JSON LCMS2 LIBXML2 MODULES NOTIFY
KQUEUE NS PDUMPER PNG RSVG THREADS TIFF TOOLKIT_SCROLL_BARS XIM ZLIB

Important settings:
  value of $LANG: en_IN.UTF-8
  locale-coding-system: utf-8-unix

Major mode: Lisp Interaction

Minor modes in effect:
  shell-dirtrack-mode: t
  electric-pair-mode: t
  display-line-numbers-mode: t
  savehist-mode: t
  global-semanticdb-minor-mode: t
  global-semantic-idle-completions-mode: t
  global-semantic-idle-scheduler-mode: t
  global-semantic-idle-summary-mode: t
  semantic-mode: t
  global-ede-mode: t
  override-global-mode: t
  show-paren-mode: t
  tooltip-mode: t
  global-eldoc-mode: t
  eldoc-mode: t
  electric-quote-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  column-number-mode: t
  line-number-mode: t
  transient-mark-mode: t
  abbrev-mode: t
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Load-path shadows:
None found.

Features:
(shadow sort flyspell ispell ol-eww eww xdg url-queue mm-url ol-rmail
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semantic/sort semantic/scope semantic/analyze/fcn semantic/db
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uniquify ediff-hook vc-hooks lisp-float-type mwheel term/ns-win ns-win
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lisp-mode prog-mode register page tab-bar menu-bar rfn-eshadow isearch
timer select scroll-bar mouse jit-lock font-lock syntax facemenu
font-core term/tty-colors frame minibuffer cl-generic cham georgian
utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao korean
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window text-properties overlay sha1 md5 base64 format env code-pages
mule custom widget hashtable-print-readable backquote threads dbusbind
kqueue cocoa ns lcms2 multi-tty make-network-process emacs)

Memory information:
((conses 16 608669 16747)
 (symbols 48 40145 1)
 (strings 32 161760 13390)
 (string-bytes 1 5103534)
 (vectors 16 61491)
 (vector-slots 8 873892 38416)
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 (intervals 56 1956 0)
 (buffers 984 30))

-- 
Regards,
Pankaj Jangid

GnuPG Fingerprint: 0B62 7424 3B26 A911 052A DDE6 7C95 6E6F F858 7689

Message #8 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Lian Hung Hon <hon.lianhung <at> gmail.com>
To: bug-gnu-emacs <at> gnu.org
Subject: bug#46203: 28.0.50; flymake doesn't start in java-mode;
 here is debugger
Date: Sun, 14 Mar 2021 12:06:32 +0800

[Message part 1 (text/plain, inline)]

In flymake-proc.el:

(defun flymake-proc--delete-temp-directory (dir-name)
  "Attempt to delete temp dir created by
`flymake-proc-create-temp-with-folder-structure', do not fail on error."
  (let* ((temp-dir    temporary-file-directory)
(suffix      (substring dir-name (1+ (length (directory-file-name
temp-dir))))))

    (while (> (length suffix) 0)
      (setq suffix (directory-file-name suffix))
      ;;+(flymake-log 0 "suffix=%s" suffix)
      (flymake-proc--safe-delete-directory
       (file-truename (expand-file-name suffix temp-dir)))
      (setq suffix (file-name-directory suffix)))))

Line 901 should be

  (let* ((temp-dir    (file-truename temporary-file-directory))

This is because the default value of variable temporary-file-directory
might be abbreviated, so substring does not work correctly. For example, on
my system (Windows) the default value
is "c:/Users/HECTOR~1/AppData/Local/Temp/". It ended up trying to delete my
source directory (!), but fortunately permission is denied.

A workaround is to manually set temporary-file-directory in .emacs to the
correct full path.

Regards,
Hon

[Message part 2 (text/html, inline)]

Message #11 received at 46203 <at> debbugs.gnu.org (full text, mbox):

From: Lian Hung Hon <hon.lianhung <at> gmail.com>
To: 46203 <at> debbugs.gnu.org
Subject: 28.0.50; flymake doesn't start in java-mode; here is debugger output
Date: Sun, 14 Mar 2021 12:43:55 +0800

[Message part 1 (text/plain, inline)]

In flymake-proc.el:

(defun flymake-proc--delete-temp-directory (dir-name)
  "Attempt to delete temp dir created by
`flymake-proc-create-temp-with-folder-structure', do not fail on error."
  (let* ((temp-dir    temporary-file-directory)
(suffix      (substring dir-name (1+ (length (directory-file-name
temp-dir))))))
    (while (> (length suffix) 0)
      (setq suffix (directory-file-name suffix))
      ;;+(flymake-log 0 "suffix=%s" suffix)
      (flymake-proc--safe-delete-directory
       (file-truename (expand-file-name suffix temp-dir)))
      (setq suffix (file-name-directory suffix)))))

Line 901 should be

  (let* ((temp-dir    (file-truename temporary-file-directory))

This is because the default value of variable temporary-file-directory
might be abbreviated, so substring does not work correctly. For example, on
my system (Windows) the default value is
"c:/Users/HECTOR~1/AppData/Local/Temp/". It ended up trying to delete my
source directory (!), but fortunately permission is denied.

A workaround is to manually set temporary-file-directory in .emacs to the
correct full path.

Regards,
Hon

[Message part 2 (text/html, inline)]

Message #14 received at 46203 <at> debbugs.gnu.org (full text, mbox):

From: Lars Ingebrigtsen <larsi <at> gnus.org>
To: Lian Hung Hon <hon.lianhung <at> gmail.com>
Cc: 46203 <at> debbugs.gnu.org
Subject: Re: bug#46203: 28.0.50; flymake doesn't start in java-mode; here is
 debugger output
Date: Tue, 14 Jun 2022 15:25:21 +0200

Lian Hung Hon <hon.lianhung <at> gmail.com> writes:

> Line 901 should be
>
>   (let* ((temp-dir    (file-truename temporary-file-directory))
>
> This is because the default value of variable temporary-file-directory might be
> abbreviated, so substring does not work correctly.

(I'm going through old bug reports that unfortunately weren't resolved
at the time.)

I've now made this change in Emacs 29, but even so, it looks somewhat
unsafe to me -- there probably should be more checks here, but I'm not
that familiar with flymake.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no

Message #17 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Lars Ingebrigtsen <larsi <at> gnus.org>
To: bug-gnu-emacs <at> gnu.org
Subject: Re: bug#46203: 28.0.50; flymake doesn't start in java-mode; here is
 debugger output
Date: Tue, 14 Jun 2022 15:28:54 +0200

Pankaj Jangid <pankaj <at> codeisgreat.org> writes:

> 1. Start Emacs with -Q flag.
> 2. (setq debug-on-error t)
> 3. Open a .java file
> 4. M-x flymake-mode
> 5. Move point
>
> Produces this debugger output:
>
> Debugger entered--Lisp error: (file-missing "Removing directory" "No such file or directory" "/private/var/folders/lf/kn5fshdx4md8xcmv02rntfzr00...")

I'm unable to reproduce this problem, but perhaps the fix proposed by
Lian Hung Hon also fixed what you're seeing here?  Are you still able to
reproduce the problem with the current Emacs 29?

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no

Message #22 received at 46203 <at> debbugs.gnu.org (full text, mbox):

From: Lars Ingebrigtsen <larsi <at> gnus.org>
To: 46203 <at> debbugs.gnu.org
Subject: Re: bug#46203: 28.0.50; flymake doesn't start in java-mode; here is
 debugger output
Date: Tue, 12 Jul 2022 15:49:12 +0200

Lars Ingebrigtsen <larsi <at> gnus.org> writes:

> I'm unable to reproduce this problem, but perhaps the fix proposed by
> Lian Hung Hon also fixed what you're seeing here?  Are you still able to
> reproduce the problem with the current Emacs 29?

More information was requested, but no response was given within a
month, so I'm closing this bug report.  If the problem still exists,
please respond to this email and we'll reopen the bug report.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no

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