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patch 8.2.1282: Vim9: crash when using CheckScriptFailure()

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Problem:    Vim9: crash when using CheckScriptFailure() in
            Test_vim9script_call_fail_decl().
Solution:   Do not decrement the def_functions len unless the function was
            newly added.
This commit is contained in:
Bram Moolenaar
2020-07-23 18:26:30 +02:00
parent 2d06bfde29
commit 6c4bfe4b31
3 changed files with 17 additions and 8 deletions
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17
src/vim9compile.c
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@@ -6945,6 +6945,7 @@ compile_def_function(ufunc_T *ufunc, int set_return_type, cctx_T *outer_cctx)
sctx_T save_current_sctx = current_sctx;
int do_estack_push;
int emsg_before = called_emsg;
int new_def_function = FALSE;
// When using a function that was compiled before: Free old instructions.
// Otherwise add a new entry in "def_functions".
@@ -6954,8 +6955,12 @@ compile_def_function(ufunc_T *ufunc, int set_return_type, cctx_T *outer_cctx)
+ ufunc->uf_dfunc_idx;
delete_def_function_contents(dfunc);
}
else if (add_def_function(ufunc) == FAIL)
return FAIL;
else
{
if (add_def_function(ufunc) == FAIL)
return FAIL;
new_def_function = TRUE;
}
ufunc->uf_def_status = UF_COMPILING;
@@ -7439,10 +7444,14 @@ erret:
delete_instr(((isn_T *)instr->ga_data) + idx);
ga_clear(instr);
// if using the last entry in the table we might as well remove it
if (!dfunc->df_deleted
// If using the last entry in the table and it was added above, we
// might as well remove it.
if (!dfunc->df_deleted && new_def_function
&& ufunc->uf_dfunc_idx == def_functions.ga_len - 1)
{
--def_functions.ga_len;
ufunc->uf_dfunc_idx = 0;
}
ufunc->uf_def_status = UF_NOT_COMPILED;
while (cctx.ctx_scope != NULL)