Reject NB=0 in DLASWLQ argument validation#1275
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DLASWLQ tested NB.LT.0 instead of NB.LE.0, accepting NB=0 silently and falling into the divide-by-(NB-M) path on line 255 (KK = MOD((N-M),(NB-M))) when M=0. The single/complex/double-complex siblings all use NB.LE.0.
langou
approved these changes
May 11, 2026
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DLASWLQ tested NB.LT.0 instead of NB.LE.0, accepting NB=0 silently and falling into the divide-by-(NB-M) path on line 255 (KK = MOD((N-M),(NB-M))) when M=0. The single/complex/double-complex siblings all use NB.LE.0.
lapack/SRC/slaswlq.f
Lines 219 to 225 in 5da5348