forked from aniani/vim
patch 9.0.0804: crash when trying to divide a number by -1
Problem: Crash when trying to divice the largest negative number by -1. Solution: Handle this case specifically.
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@ -66,6 +66,12 @@ num_divide(varnumber_T n1, varnumber_T n2, int *failed)
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else
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result = VARNUM_MAX;
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}
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else if (n1 == VARNUM_MIN && n2 == -1)
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{
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// specific case: trying to do VARNUM_MIN / -1 results in a positive
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// number that doesn't fit in varnumber_T and causes an FPE
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result = VARNUM_MAX;
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}
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else
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result = n1 / n2;
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@ -6023,7 +6029,7 @@ var2fpos(
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}
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/*
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* Convert list in "arg" into position "psop" and optional file number "fnump".
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* Convert list in "arg" into position "posp" and optional file number "fnump".
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* When "fnump" is NULL there is no file number, only 3 items: [lnum, col, off]
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* Note that the column is passed on as-is, the caller may want to decrement
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* it to use 1 for the first column.
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@ -761,6 +761,12 @@ func Test_eval_after_if()
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call assert_equal('b', s:val)
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endfunc
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func Test_divide_by_zero()
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" only tests that this doesn't crash, the result is not important
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echo 0 / 0
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echo 0 / 0 / -1
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endfunc
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" Test for command-line completion of expressions
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func Test_expr_completion()
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CheckFeature cmdline_compl
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@ -695,6 +695,8 @@ static char *(features[]) =
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static int included_patches[] =
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{ /* Add new patch number below this line */
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/**/
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804,
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/**/
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803,
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/**/
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