# \#alloccheck

**URL:** https://discourse.julialang.org/tag/alloccheck/1680.md

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## [Why check\_allocs warns about reliability?](https://discourse.julialang.org/t/why-check-allocs-warns-about-reliability/137660)

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**Author:** [@Benny](https://discourse.julialang.org/u/Benny)\
**Replies:** 0\
**Last updated:** [June 16, 2026, 6:32pm UTC](https://discourse.julialang.org/t/why-check-allocs-warns-about-reliability/137660 "2026-06-16T18:32:38Z")

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The docstring for check\_allocs in AllocCheck.jl warns, in part: If you rely on allocation-free code for safety/correctness, it is not sufficient to verify check\_allocs in test code and expect that the corresponding cal…

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## [\`ReadOnlyMemoryError()\` with AllocCheck's \`@check\_allocs\`](https://discourse.julialang.org/t/readonlymemoryerror-with-allocchecks-check-allocs/123312)

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**Author:** [@sadish-d](https://discourse.julialang.org/u/sadish-d)\
**Replies:** 1\
**Last updated:** [December 1, 2024, 3:03am UTC](https://discourse.julialang.org/t/readonlymemoryerror-with-allocchecks-check-allocs/123312 "2024-12-01T03:03:47Z")

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Wondering if anybody knows why I would get a ReadOnlyMemoryError() below. using AllocCheck struct S \_1::Int64 \_2::Int64 S() = new(1, 2) end @check\_allocs f() = S() f() ERROR: ReadOnlyMemoryError() Stacktrac…

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## [Proving that copyto! is allocation-free on a view, using AllocCheck](https://discourse.julialang.org/t/proving-that-copyto-is-allocation-free-on-a-view-using-alloccheck/121318)

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**Author:** [@gdalle](https://discourse.julialang.org/u/gdalle)\
**Replies:** 7\
**Last updated:** [October 15, 2024, 3:21pm UTC](https://discourse.julialang.org/t/proving-that-copyto-is-allocation-free-on-a-view-using-alloccheck/121318 "2024-10-15T15:21:11Z")

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Hi there, I wanted to add allocation checks to the DifferentiationInterface.jl test suite, but the code for my in-place jacobian! involves copying a vector into a matrix column. Unfortunately, AllocCheck.jl cannot guara…