[Cbc-tickets] [COIN-OR Branch-and-Cut MIP Solver] #111: Memory leak in Cbc

[COIN-OR Branch-and-Cut MIP Solver]

#111: Memory leak in Cbc
---------------------+------------------------------------------------------
Reporter:  Gassmann  |       Type:  defect
  Status:  new       |   Priority:  major 
 Version:  2.7       |   Keywords:        
---------------------+------------------------------------------------------
 During our work on the weekend I found a leak in the Cbc solver when
 specifying

 cbc mpsfile -solve -solve

 The input file and valgrind leak report are appended below.

 ROWS
  N  OBJ
  L  R0000000
  L  R0000001
  L  R0000002
  L  R0000003
 COLUMNS
     MARK0000  'MARKER'                 'INTORG'
     x0        OBJ              -10.0
     x0        R0000000           0.7   R0000001           0.5
     x0        R0000002           1.0   R0000003           0.1
     x1        OBJ               -9.0
     x1        R0000000           1.0   R0000001        0.8333
     x1        R0000002        0.6667   R0000003          0.25
     MARK0000  'MARKER'                 'INTEND'
 RHS
     RHS1      R0000000           630
     RHS1      R0000001           600
     RHS1      R0000002           708
     RHS1      R0000003           135
 BOUNDS
 ENDATA


 ==8931== My PID = 8931, parent PID = 6308.  Prog and args are:
 ==8931==    ./cbc
 ==8931==    ../../OS/data/mpsFiles/parincInteger.mps
 ==8931==    -solve
 ==8931==    -solve
 ==8931==
 ==8931== Invalid read of size 4
 ==8931==    at 0x41E729: CbcMain1(int, char const**, CbcModel&, int
 (*)(CbcModel*, int)) (CbcSolver.cpp:4464)
 ==8931==    by 0x432BFC: CbcMain1(int, char const**, CbcModel&)
 (CbcSolver.cpp:1093)
 ==8931==    by 0x403D5A: main (CoinSolve.cpp:337)
 ==8931==  Address 0x5d1ad44 is 4 bytes before a block of size 0 alloc'd
 ==8931==    at 0x4C2582C: operator new[](unsigned long)
 (vg_replace_malloc.c:274)
 ==8931==    by 0x5EEE66: CglPreProcess::createOriginalIndices() const
 (CglPreProcess.cpp:5099)
 ==8931==    by 0x5EF169: CglPreProcess::originalColumns() const
 (CglPreProcess.cpp:5069)
 ==8931==    by 0x41B37A: CbcMain1(int, char const**, CbcModel&, int
 (*)(CbcModel*, int)) (CbcSolver.cpp:3756)
 ==8931==    by 0x432BFC: CbcMain1(int, char const**, CbcModel&)
 (CbcSolver.cpp:1093)
 ==8931==    by 0x403D5A: main (CoinSolve.cpp:337)
 ==8931==
 ==8931== ERROR SUMMARY: 1 errors from 1 contexts (suppressed: 8 from 1)
 ==8931== malloc/free: in use at exit: 84 bytes in 2 blocks.
 ==8931== malloc/free: 8,370 allocs, 8,368 frees, 17,501,489 bytes
 allocated.
 ==8931== For counts of detected errors, rerun with: -v
 ==8931== searching for pointers to 2 not-freed blocks.
 ==8931== checked 212,480 bytes.
 ==8931==
 ==8931==
 ==8931== 28 bytes in 1 blocks are definitely lost in loss record 1 of 2
 ==8931==    at 0x4C2582C: operator new[](unsigned long)
 (vg_replace_malloc.c:274)
 ==8931==    by 0x4249AE: CbcMain1(int, char const**, CbcModel&, int
 (*)(CbcModel*, int)) (CbcSolver.cpp:5655)
 ==8931==    by 0x432BFC: CbcMain1(int, char const**, CbcModel&)
 (CbcSolver.cpp:1093)
 ==8931==    by 0x403D5A: main (CoinSolve.cpp:337)
 ==8931==
 ==8931==
 ==8931== 56 bytes in 1 blocks are definitely lost in loss record 2 of 2
 ==8931==    at 0x4C2582C: operator new[](unsigned long)
 (vg_replace_malloc.c:274)
 ==8931==    by 0x4249D6: CbcMain1(int, char const**, CbcModel&, int
 (*)(CbcModel*, int)) (CbcSolver.cpp:5657)
 ==8931==    by 0x432BFC: CbcMain1(int, char const**, CbcModel&)
 (CbcSolver.cpp:1093)
 ==8931==    by 0x403D5A: main (CoinSolve.cpp:337)
 ==8931==
 ==8931== LEAK SUMMARY:
 ==8931==    definitely lost: 84 bytes in 2 blocks.
 ==8931==      possibly lost: 0 bytes in 0 blocks.
 ==8931==    still reachable: 0 bytes in 0 blocks.
 ==8931==         suppressed: 0 bytes in 0 blocks.

-- 
Ticket URL: <https://projects.coin-or.org/Cbc/ticket/111>
COIN-OR Branch-and-Cut MIP Solver <http://projects.coin-or.org/Cbc>
An LP-based branch-and-cut MIP solver.