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linalg: fix typo in least-squares complex space allocation #830

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merged 4 commits into from
May 28, 2024

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@perazz perazz commented May 27, 2024

Fix #823: typo setting complex storage space in the lstsq solver.

Thank you @jalvesz @loiseaujc for reporting. cc: @jvdp1 @fortran-lang/stdlib

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jalvesz commented May 28, 2024

I tested it with a WSL, it still segfaults with the change you proposed.

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perazz commented May 28, 2024

I believe I've found the issue (passing real space nrs instead of complex space ncs for the complex case). I apologize as for some reason this error was never triggered in my macOS development environment (no bounds checking due to (*) in LAPACK + macOS overprovisions allocations, I guess?)

@perazz perazz marked this pull request as ready for review May 28, 2024 05:34
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jalvesz commented May 28, 2024

Yes, that solved the segfault!!

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perazz commented May 28, 2024

Awesome! Thank you @loiseaujc and @jalvesz for reporting.

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Thanks for fixing

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@jvdp1 jvdp1 left a comment

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LGTM. Thank you

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perazz commented May 28, 2024

Thank you for the two approvals, merging now.

@perazz perazz merged commit dc707f8 into fortran-lang:master May 28, 2024
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@perazz perazz deleted the fix_lstsq branch May 28, 2024 12:06
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Bug in the complex least-squares solver
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