/tmp/select/src/board.c:50:9: warning: Access to field 'up' results in a dereference of a null pointer (loaded from variable 'p') [clang-analyzer-core.NullDereference]
                p->up = NULL;
                      ^
/tmp/select/src/board.c:9:17: note: Null pointer value stored to field 'right'
        start->right = calloc ( 1, sizeof ( struct item ) );
                       ^
/tmp/select/src/board.c:19:19: note: Assuming 'i' is >= 'w'
        for ( int i = 0; i < w; i++ )
                         ^
/tmp/select/src/board.c:19:2: note: Loop condition is false. Execution continues on line 46
        for ( int i = 0; i < w; i++ )
        ^
/tmp/select/src/board.c:48:19: note: Assuming 'i' is < 'h'
        for ( int i = 0; i < h; i++ )
                         ^
/tmp/select/src/board.c:48:2: note: Loop condition is true.  Entering loop body
        for ( int i = 0; i < h; i++ )
        ^
/tmp/select/src/board.c:51:3: note: Null pointer value stored to 'p'
                p = p->right;
                ^
/tmp/select/src/board.c:48:19: note: Assuming 'i' is < 'h'
        for ( int i = 0; i < h; i++ )
                         ^
/tmp/select/src/board.c:48:2: note: Loop condition is true.  Entering loop body
        for ( int i = 0; i < h; i++ )
        ^
/tmp/select/src/board.c:50:9: note: Access to field 'up' results in a dereference of a null pointer (loaded from variable 'p')
                p->up = NULL;
                      ^
/tmp/select/src/board.c:63:19: warning: statement should be inside braces [readability-braces-around-statements]
                        if ( !p || !t ) break;
                                       ^
/tmp/select/src/board.c:71:7: warning: Access to field 'down' results in a dereference of a null pointer (loaded from variable 'l') [clang-analyzer-core.NullDereference]
                l = l->down;
                    ^
/tmp/select/src/board.c:19:19: note: Assuming 'i' is < 'w'
        for ( int i = 0; i < w; i++ )
                         ^
/tmp/select/src/board.c:19:2: note: Loop condition is true.  Entering loop body
        for ( int i = 0; i < w; i++ )
        ^
/tmp/select/src/board.c:23:21: note: Assuming 'ii' is < 'h'
                for ( int ii = 0; ii < h; ii ++ )
                                  ^
/tmp/select/src/board.c:23:3: note: Loop condition is true.  Entering loop body
                for ( int ii = 0; ii < h; ii ++ )
                ^
/tmp/select/src/board.c:23:21: note: Assuming 'ii' is >= 'h'
                for ( int ii = 0; ii < h; ii ++ )
                                  ^
/tmp/select/src/board.c:23:3: note: Loop condition is false. Execution continues on line 38
                for ( int ii = 0; ii < h; ii ++ )
                ^
/tmp/select/src/board.c:19:19: note: Assuming 'i' is >= 'w'
        for ( int i = 0; i < w; i++ )
                         ^
/tmp/select/src/board.c:19:2: note: Loop condition is false. Execution continues on line 46
        for ( int i = 0; i < w; i++ )
        ^
/tmp/select/src/board.c:48:2: note: Loop condition is true.  Entering loop body
        for ( int i = 0; i < h; i++ )
        ^
/tmp/select/src/board.c:48:2: note: Loop condition is false. Execution continues on line 54
/tmp/select/src/board.c:56:2: note: Value assigned to 'l'
        l = start->right->down;
        ^
/tmp/select/src/board.c:59:2: note: Loop condition is true.  Entering loop body
        for ( int i = 0; i < w ; i++ )
        ^
/tmp/select/src/board.c:61:3: note: Loop condition is true.  Entering loop body
                for ( int ii = 0; ii < h; ii ++ )
                ^
/tmp/select/src/board.c:63:9: note: Left side of '||' is false
                        if ( !p || !t ) break;
                             ^
/tmp/select/src/board.c:63:15: note: Assuming 't' is null
                        if ( !p || !t ) break;
                                   ^
/tmp/select/src/board.c:63:4: note: Taking true branch
                        if ( !p || !t ) break;
                        ^
/tmp/select/src/board.c:63:20: note:  Execution continues on line 70
                        if ( !p || !t ) break;
                                        ^
/tmp/select/src/board.c:71:7: note: Access to field 'down' results in a dereference of a null pointer (loaded from variable 'l')
                l = l->down;
                    ^
/tmp/select/src/board.c:83:8: warning: Access to field 'right' results in a dereference of a null pointer (loaded from variable 'p') [clang-analyzer-core.NullDereference]
                        p = p->right;
                            ^
/tmp/select/src/board.c:9:17: note: Null pointer value stored to field 'right'
        start->right = calloc ( 1, sizeof ( struct item ) );
                       ^
/tmp/select/src/board.c:19:19: note: Assuming 'i' is < 'w'
        for ( int i = 0; i < w; i++ )
                         ^
/tmp/select/src/board.c:19:2: note: Loop condition is true.  Entering loop body
        for ( int i = 0; i < w; i++ )
        ^
/tmp/select/src/board.c:23:21: note: Assuming 'ii' is >= 'h'
                for ( int ii = 0; ii < h; ii ++ )
                                  ^
/tmp/select/src/board.c:23:3: note: Loop condition is false. Execution continues on line 38
                for ( int ii = 0; ii < h; ii ++ )
                ^
/tmp/select/src/board.c:19:19: note: Assuming 'i' is >= 'w'
        for ( int i = 0; i < w; i++ )
                         ^
/tmp/select/src/board.c:19:2: note: Loop condition is false. Execution continues on line 46
        for ( int i = 0; i < w; i++ )
        ^
/tmp/select/src/board.c:48:2: note: Loop condition is false. Execution continues on line 54
        for ( int i = 0; i < h; i++ )
        ^
/tmp/select/src/board.c:59:2: note: Loop condition is true.  Entering loop body
        for ( int i = 0; i < w ; i++ )
        ^
/tmp/select/src/board.c:61:3: note: Loop condition is false. Execution continues on line 70
                for ( int ii = 0; ii < h; ii ++ )
                ^
/tmp/select/src/board.c:59:2: note: Loop condition is false. Execution continues on line 77
        for ( int i = 0; i < w ; i++ )
        ^
/tmp/select/src/board.c:79:2: note: Loop condition is true.  Entering loop body
        for ( int i = 0; i < w; i++ )
        ^
/tmp/select/src/board.c:81:21: note: Assuming the condition is true
                for ( int ii = 0; ii < h-1; ii++ )
                                  ^
/tmp/select/src/board.c:81:3: note: Loop condition is true.  Entering loop body
                for ( int ii = 0; ii < h-1; ii++ )
                ^
/tmp/select/src/board.c:83:4: note: Null pointer value stored to 'p'
                        p = p->right;
                        ^
/tmp/select/src/board.c:81:3: note: Loop condition is true.  Entering loop body
                for ( int ii = 0; ii < h-1; ii++ )
                ^
/tmp/select/src/board.c:83:8: note: Access to field 'right' results in a dereference of a null pointer (loaded from variable 'p')
                        p = p->right;
                            ^
/tmp/select/src/board.c:99:11: warning: Access to field 'down' results in a dereference of a null pointer (loaded from variable 'p') [clang-analyzer-core.NullDereference]
                p->down = NULL;
                        ^
/tmp/select/src/board.c:19:19: note: Assuming 'i' is >= 'w'
        for ( int i = 0; i < w; i++ )
                         ^
/tmp/select/src/board.c:19:2: note: Loop condition is false. Execution continues on line 46
        for ( int i = 0; i < w; i++ )
        ^
/tmp/select/src/board.c:48:19: note: Assuming 'i' is < 'h'
        for ( int i = 0; i < h; i++ )
                         ^
/tmp/select/src/board.c:48:2: note: Loop condition is true.  Entering loop body
        for ( int i = 0; i < h; i++ )
        ^
/tmp/select/src/board.c:50:3: note: Null pointer value stored to field 'up'
                p->up = NULL;
                ^
/tmp/select/src/board.c:48:19: note: Assuming 'i' is >= 'h'
        for ( int i = 0; i < h; i++ )
                         ^
/tmp/select/src/board.c:48:2: note: Loop condition is false. Execution continues on line 54
        for ( int i = 0; i < h; i++ )
        ^
/tmp/select/src/board.c:59:2: note: Loop condition is false. Execution continues on line 77
        for ( int i = 0; i < w ; i++ )
        ^
/tmp/select/src/board.c:79:2: note: Loop condition is false. Execution continues on line 91
        for ( int i = 0; i < w; i++ )
        ^
/tmp/select/src/board.c:92:2: note: Loop condition is false. Execution continues on line 96
        for ( int i = 0; i < w; i++ )
        ^
/tmp/select/src/board.c:96:2: note: Null pointer value stored to 'p'
        p = p->up;
        ^
/tmp/select/src/board.c:97:2: note: Loop condition is true.  Entering loop body
        for ( int i = 0; i < h; i++ )
        ^
/tmp/select/src/board.c:99:11: note: Access to field 'down' results in a dereference of a null pointer (loaded from variable 'p')
                p->down = NULL;
                        ^
/tmp/select/src/main.c:6:16: warning: parameter 'argc' is unused [misc-unused-parameters]
int main ( int argc, char *argv[] )
               ^~~~~
                /*argc*/
/tmp/select/src/main.c:6:28: warning: parameter 'argv' is unused [misc-unused-parameters]
int main ( int argc, char *argv[] )
                           ^~~~~~
                            /*argv*/