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patch 9.1.1527: Vim9: Crash with string compound assignment

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Problem:  Vim9: Crash when using string compound assignment with wrong
          data type (lacygoill)
Solution: verify expected member type (Hirohito Higashi)

fixes: #17675
closes: #17693

Signed-off-by: Hirohito Higashi <h.east.727@gmail.com>
Signed-off-by: Yegappan Lakshmanan <yegappan@yahoo.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
This commit is contained in:
Hirohito Higashi
2025-07-08 21:47:01 +02:00
committed by Christian Brabandt
parent 32a1b26ef3
commit 2ffd35fe8f
3 changed files with 10 additions and 1 deletions
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8
src/vim9compile.c
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@ -3444,7 +3444,13 @@ compile_assign_compound_op(cctx_T *cctx, cac_T *cac)
if (*cac->cac_op == '.')
{
if (may_generate_2STRING(-1, TOSTRING_NONE, cctx) == FAIL)
expected = lhs->lhs_member_type;
stacktype = get_type_on_stack(cctx, 0);
if (expected != &t_string
&& need_type(stacktype, expected, FALSE, -1, 0, cctx,
FALSE, FALSE) == FAIL)
return FAIL;
else if (may_generate_2STRING(-1, TOSTRING_NONE, cctx) == FAIL)
return FAIL;
}
else