Avoid memory corruption if INFO<0

martin-frbg · web-flow · commit d72484317a6f · 2025-05-17T15:00:44.000+02:00
diff --git a/SRC/zgeev.f b/SRC/zgeev.f
@@ -493,7 +493,7 @@ SUBROUTINE ZGEEV( JOBVL, JOBVR, N, A, LDA, W, VL, LDVL, VR,
 *     Undo scaling if necessary
 *
    50 CONTINUE
-      IF( SCALEA ) THEN
+      IF( SCALEA .AND.INFO.GE.0) THEN
          CALL ZLASCL( 'G', 0, 0, CSCALE, ANRM, N-INFO, 1,
      $                W( INFO+1 ),
      $                MAX( N-INFO, 1 ), IERR )

Original file line number	Diff line number	Diff line change
`@@ -493,7 +493,7 @@ SUBROUTINE ZGEEV( JOBVL, JOBVR, N, A, LDA, W, VL, LDVL, VR,`
`493`	`493`	`* Undo scaling if necessary`
`494`	`494`	`*`
`495`	`495`	`50 CONTINUE`
`496`		`- IF( SCALEA ) THEN`
	`496`	`+ IF( SCALEA .AND.INFO.GE.0) THEN`
`497`	`497`	`CALL ZLASCL( 'G', 0, 0, CSCALE, ANRM, N-INFO, 1,`
`498`	`498`	`$ W( INFO+1 ),`
`499`	`499`	`$ MAX( N-INFO, 1 ), IERR )`