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3367 :: IOError when compiling from VSCode's internal terminal

• adrien79 (orginal) [2017-11-25T15:44:57+01:00] view original

  I'm having a weird problem when compiling a Nim program from VSCode's internal terminal. Compilation starts normally then stops at a random moment with:

  Error: unhandled exception: Unknown IO Error [IOError]
  Run

  Apparently this is a Nim error message. It appears in the compiler output sometimes at the weirdest moment, like this:

  Hint: tError: unhandled exception: Unknown IO Error [IOError]
  Run

  The compilation still goes to the end once in a while, but this is unpredictable (and frustrating).

  This only happens on my Windows 10 machine (on Linux it runs fine). It started to happen right after I updated the OS to its latest version (1709). Compiling the same Nim program from another terminal (git-bash) still works.

  I've tried to reinstall VSCode and Nim (from the git repository) but the error is still there.

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• dom96 (orginal) [2017-11-26T01:33:33+01:00] view original

  Only way for us to figure this out is for you to grab a debug compiler to get a stack trace. You'll need to bootstrap manually for that though.

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• adrien79 (orginal) [2017-11-26T10:00:39+01:00] view original

  I've generated a debug compiler with

  
  koch boot -d:debug --debuginfo --stackTrace:on
  Run

  I could reproduce the same error many times (with non deterministic behaviour). The stack trace always ends like this:

  
  modules.nim(180)         compileModule
  passes.nim(182)          processModule
  passes.nim(112)          openPasses
  passaux.nim(20)          verboseOpen
  msgs.nim(951)            rawMessage
  msgs.nim(815)            rawMessage
  sysio.nim(68)            checkErr
  sysio.nim(60)            raiseEIO
  system.nim(2809)         sysFatal
  Error: unhandled exception: Unknown IO Error [IOError]
  Run

  or like this:

  
  modules.nim(180)         compileModule
  passes.nim(221)          processModule
  passes.nim(128)          closePasses
  sem.nim(577)             myClose
  lookups.nim(73)          closeScope
  lookups.nim(175)         ensureNoMissingOrUnusedSymbols
  msgs.nim(1044)           message
  msgs.nim(815)            liMessage
  sysio.nim(68)            checkErr
  sysio.nim(60)            raiseEIO
  system.nim(2809)         sysFatal
  Error: unhandled exception: Unknown IO Error [IOError]
  Run

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• MJCaley (orginal) [2017-11-28T21:06:10+01:00] view original

  I've got the same problem on my work laptop. It seems like it only happens within VSCode after its been open for a while. Compiling in a console works fine from what I can tell.

  If I hammer the compile button a few times it'll go through eventually.

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• dandev (orginal) [2018-01-19T18:09:46+01:00] view original

  Also experiencing this after updating Windows 10. Did you find any fix? Thanks in advance!

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• dandev (orginal) [2018-01-19T18:27:29+01:00] view original

  I think I found a workaround:

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  1. Open a new Command Prompt (Start Menu -> type: "cmd" -> Enter)
  2. Right click the top left icon in the command prompt window and choose "Properties"
  3. Check the "Use legacy console (requires relaunch)" checkbox.
  4. Click OK and close the Command Prompt window
  5. Restart VS Code

  ---

  It should work now.

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• monster (orginal) [2018-01-19T19:50:51+01:00] view original

  I've had this all the time. I can confirm that the fix of @dandev works for me. :)

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