diff options
Diffstat (limited to 'lib/core')
| -rw-r--r-- | lib/core/typeinfo.nim | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/core/typeinfo.nim b/lib/core/typeinfo.nim index d66dc1898..18d2091b9 100644 --- a/lib/core/typeinfo.nim +++ b/lib/core/typeinfo.nim @@ -216,7 +216,8 @@ proc extendSeq*(x: Any) = when defined(gcDestructors): var s = cast[ptr NimSeqV2Reimpl](x.value) let elem = x.rawType.base - s.p = cast[ptr NimSeqPayloadReimpl](prepareSeqAdd(s.len, s.p, 1, elem.size, elem.align)) + if s.p == nil or s.p.cap < s.len+1: + s.p = cast[ptr NimSeqPayloadReimpl](prepareSeqAdd(s.len, s.p, 1, elem.size, elem.align)) inc s.len else: var y = cast[ptr PGenSeq](x.value)[] |