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fixes #17173 (#17213)

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* fixes #17173

* add testcase (#17214)

* Apply suggestions from code review

* fix for newruntime

* Apply suggestions from code review

* Update lib/system.nim

* Update lib/system.nim

* Update lib/system.nim

Co-authored-by: Danil Yarantsev <tiberiumk12@gmail.com>

Co-authored-by: flywind <xzsflywind@gmail.com>
Co-authored-by: Danil Yarantsev <tiberiumk12@gmail.com>
This commit is contained in:
Andreas Rumpf 2021-03-01 20:58:12 +01:00 • committed by GitHub
commit bb0c19f42c
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5 changed files with 33 additions and 2 deletions
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6
lib/system.nim
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@ -3127,3 +3127,9 @@ export io
when not defined(createNimHcr) and not defined(nimscript):
include nimhcr
when notJSnotNims and not defined(nimSeqsV2):
proc prepareStrMutation*(s: var string) {.inline.} =
## String literals (e.g. "abc", etc) in the ARC/ORC mode are "copy on write",
## therefore you should call `prepareStrMutation` before modifying the strings.
discard