ArrayBufferWriter double grow boundary fix#124470
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jkotas merged 1 commit intodotnet:mainfrom Feb 16, 2026
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This was referenced Feb 16, 2026
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ArrayBufferWriter unexpectedly fails to reallocate if current length is int.MaxValue/2, e.g.:
var abw = new ArrayBufferWriter(int.MaxValue / 2);
abw.Advance(abw.Capacity);
abw.GetMemory(1); // throws
Unfortunately it's hard to write a test because the result will be OutOfMemoryException, same as if there is just not enough memory.
Found by Linux Verification Center (linuxtesting.org).