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fixes #11891

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This commit is contained in:
Andreas Rumpf 2019-08-10 15:41:24 +02:00
commit 212ae2f125
5 changed files with 26 additions and 2 deletions
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10
lib/core/strs.nim
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@ -189,3 +189,13 @@ proc nimAsgnStrV2(a: var NimStringV2, b: NimStringV2) {.compilerRtl.} =
a.p.cap = b.len
a.len = b.len
copyMem(unsafeAddr a.p.data[0], unsafeAddr b.p.data[0], b.len+1)
proc nimPrepareStrMutationV2(s: var NimStringV2) {.compilerRtl.} =
if s.p != nil and s.p.allocator == nil:
let oldP = s.p
# can't mutate a literal, so we need a fresh copy here:
let allocator = getLocalAllocator()
s.p = cast[ptr NimStrPayload](allocator.alloc(allocator, contentSize(s.len)))
s.p.allocator = allocator
s.p.cap = s.len
copyMem(unsafeAddr s.p.data[0], unsafeAddr oldP.data[0], s.len+1)