Opened 12 years ago

Closed 12 years ago

## #359 closed bug (fixed)

# crash with matrix-cast,

Reported by: | gorzel | Owned by: | hannes |
---|---|---|---|

Priority: | major | Milestone: | 3-1-4 and higher |

Component: | singular-kernel | Version: | 3-1-3 |

Keywords: | matrix cast | Cc: |

### Description

The cast matrix(A,n,m) for resizing a given matrix needs an errormessage if n or m are non-positive.

Otherwise it may cause some crash.

> ring r=0,x,dp; > matrix(8,1,1); _[1,1]=8 > print(matrix(8,3,4)); 8,0,0,0, 0,0,0,0, 0,0,0,0 > matrix A = 8; > A; A[1,1]=8 > matrix(A,1,1); // everythin if fine up to here but ... _[1,1]=8 //... the following the non-postive second and third args should be rejected > matrix(A,1,0); // already this bug may lead to crash if used as input > matrix B = _; > B; // what is B ? > size(B); 0 > ncols(B); 0 > nrows(B); // mismatch with size(B) 1 > matrix(A,0,1); _[1,1]=0 > matrix(A,-1,1); _[1,1]=0 > matrix(1,-1,1); // compare with the beginning Singular : signal 11 (v: 3132/ 14363 ): current line:>>matrix(1,-1,1);<< Segment fault/Bus error occurred at 804af70 because of b7fa7000 (r:1313155815) please inform the authors trying to restart...

Finally I had to kill the process since Singular continued to run.

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fixed with rev.14415