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fixes ptr to cstring warnings[backport] (#20848)

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* fix =#13790 ptr char (+friends) should not implicitly convert to cstring

* Apply suggestions from code review

* first round; compiles on windows

* nimPreviewSlimSystem

* conversion is unsafe, cast needed

* fixes more tests

* fixes asyncnet

* another try another error

* last one

* true

* one more

* why bugs didn't show at once

* add `nimPreviewCstringConversion` switch

* typo

* fixes ptr to cstring warnings[backport]

* add fixes

Co-authored-by: xflywind <43030857+xflywind@users.noreply.github.com>
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ringabout 2022-11-16 17:22:51 +08:00 • committed by GitHub
commit 06cd15663d
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compiler/sighashes.nim
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@ -20,7 +20,7 @@ when defined(nimPreviewSlimSystem):
proc `&=`(c: var MD5Context, s: string) = md5Update(c, s, s.len)
proc `&=`(c: var MD5Context, ch: char) =
# XXX suspicious code here; relies on ch being zero terminated?
md5Update(c, unsafeAddr ch, 1)
md5Update(c, cast[cstring](unsafeAddr ch), 1)
proc `&=`(c: var MD5Context, i: BiggestInt) =
md5Update(c, cast[cstring](unsafeAddr i), sizeof(i))