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fix IB in fifoToOwnedArrayList

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memcpy requires non-overlapping arguments.

fifo.realign() handles this case correctly and tries to provide an
optimized implementation.

This probably wasn't hit in practice, as, in a typical usage, fifo's
head is not advanced.
This commit is contained in:
Alex Kladov 2024-09-14 02:42:11 +01:00 committed by Andrew Kelley
parent c062c532d7
commit ffd071f558
1 changed files with 1 additions and 3 deletions
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4
lib/std/process/Child.zig
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@ -316,9 +316,7 @@ pub const RunResult = struct {
}; };
fn fifoToOwnedArrayList(fifo: *std.io.PollFifo) std.ArrayList(u8) { fn fifoToOwnedArrayList(fifo: *std.io.PollFifo) std.ArrayList(u8) {
if (fifo.head > 0) { if (fifo.head != 0) fifo.realign();
@memcpy(fifo.buf[0..fifo.count], fifo.buf[fifo.head..][0..fifo.count]);
}
const result = std.ArrayList(u8){ const result = std.ArrayList(u8){
.items = fifo.buf[0..fifo.count], .items = fifo.buf[0..fifo.count],
.capacity = fifo.buf.len, .capacity = fifo.buf.len,