Term write rule crash compiler.

[slangmgh]

The following code quit the compiler.

import chronicles, terminal, os, strformat

proc sleep_check_ctrl_c(t: int) =
   const sleep_time = 1000
   var t = t
   let pout = stderr
   if t > 0: sleep(t)

   pout.write(ansiResetCode)
   pout.write("\e[2K")
   #let stylePrefix = "\e["
   #pout.write(fmt"{stylePrefix}0G")
   pout.write("\e[?25h")

chronicles is needed to make the compiler crash. it is from status-im/chronicles.

And if we change the code a little bit, like uncomment the last two line, or delete the last line, or delete the line 'const sleep_time = 1000', compile is fine.

[Araq]

Well ok, but for a test case I need a version without dependency on status-im/chronicles.

[slangmgh]

It is the term write rule.
The following code crash the compiler:

import terminal

template optimizeLogWrites*{
  write(f, x)
  write(f, y)
}(x, y: string{lit}, f: File) =
  write(f, x & y)

proc foo() =
   const N = 1
   stdout.write("")
   stdout.write("")

[genotrance]

Still crashes with #head, full stacktrace below.

-------- SNIPPET --------
import terminal

template optimizeLogWrites*{
  write(f, x)
  write(f, y)
}(x, y: string{lit}, f: File) =
  write(f, x & y)

proc foo() =
   const N = 1
   stdout.write("")
   stdout.write("")
-------------------------

-------- OUTPUT --------
Hint: used config file 'c:\users\gt\Desktop\DL\programming\nimdevel\config\nim.cfg' [Conf]
Hint: system [Processing]
Hint: temp [Processing]
Hint: terminal [Processing]
Hint: macros [Processing]
Hint: strformat [Processing]
Hint: parseutils [Processing]
Hint: unicode [Processing]
Hint: strutils [Processing]
Hint: math [Processing]
Hint: bitops [Processing]
Hint: algorithm [Processing]
Hint: colors [Processing]
Hint: tables [Processing]
Hint: hashes [Processing]
Hint: winlean [Processing]
Hint: dynlib [Processing]
Hint: os [Processing]
Hint: times [Processing]
Hint: options [Processing]
Hint: typetraits [Processing]
Hint: ospaths [Processing]
temp.nim(10, 4) Hint: optimizeLogWrites("", "", stdout) --> 'write(stdout, "")' [Pattern]
temp.nim(10, 10) Error: internal error: transformConstSection
No stack traceback available
To create a stacktrace, rerun compilation with ./koch temp c <file>
------------------------

-------- NIMTEMP --------
Hint: used config file 'c:\users\gt\Desktop\DL\programming\nimdevel\config\nim.cfg' [Conf]
Hint: system [Processing]
Hint: temp [Processing]
Hint: terminal [Processing]
Hint: macros [Processing]
Hint: strformat [Processing]
Hint: parseutils [Processing]
Hint: unicode [Processing]
Hint: strutils [Processing]
Hint: math [Processing]
Hint: bitops [Processing]
Hint: algorithm [Processing]
Hint: colors [Processing]
Hint: tables [Processing]
Hint: hashes [Processing]
Hint: winlean [Processing]
Hint: dynlib [Processing]
Hint: os [Processing]
Hint: times [Processing]
Hint: options [Processing]
Hint: typetraits [Processing]
Hint: ospaths [Processing]
temp.nim(10, 4) Hint: optimizeLogWrites("", "", stdout) --> 'write(stdout, "")' [Pattern]
temp.nim(10, 10) Error: internal error: transformConstSection
Traceback (most recent call last)
nim.nim(107)             nim
nim.nim(71)              handleCmdLine
cmdlinehelper.nim(84)    loadConfigsAndRunMainCommand
main.nim(162)            mainCommand
main.nim(73)             commandCompileToC
modules.nim(124)         compileProject
modules.nim(71)          compileModule
passes.nim(194)          processModule
passes.nim(103)          processTopLevelStmt
sem.nim(592)             myProcess
sem.nim(560)             semStmtAndGenerateGenerics
semstmts.nim(1936)       semStmt
semexprs.nim(920)        semExprNoType
semexprs.nim(2541)       semExpr
semstmts.nim(1727)       semProc
semstmts.nim(1658)       semProcAux
transf.nim(1031)         transformBody
transf.nim(972)          processTransf
transf.nim(957)          transform
transf.nim(111)          transformSons
transf.nim(921)          transform
transf.nim(210)          transformConstSection
msgs.nim(521)            internalError
msgs.nim(492)            liMessage
msgs.nim(321)            handleError
msgs.nim(311)            quit
-------------------------

-------- VERSION --------
Nim Compiler Version 0.18.1 [Windows: i386]
Compiled at 2018-09-12
Copyright (c) 2006-2018 by Andreas Rumpf

git hash: 87955eaf3048bd6b69a988ac330f9d35b2cfa39e
active boot switches: -d:release
-------------------------