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patch 8.2.0056: execution stack is incomplete and inefficient
Problem: Execution stack is incomplete and inefficient. Solution: Introduce a proper execution stack and use it instead of sourcing_name/sourcing_lnum. Create a string only when used.
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@@ -534,15 +534,16 @@ throw_exception(void *value, except_type_T type, char_u *cmdname)
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goto nomem;
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excp->type = type;
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excp->throw_name = vim_strsave(sourcing_name == NULL
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? (char_u *)"" : sourcing_name);
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excp->throw_name = estack_sfile();
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if (excp->throw_name == NULL)
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excp->throw_name = vim_strsave((char_u *)"");
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if (excp->throw_name == NULL)
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{
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if (should_free)
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vim_free(excp->value);
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goto nomem;
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}
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excp->throw_lnum = sourcing_lnum;
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excp->throw_lnum = SOURCING_LNUM;
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if (p_verbose >= 13 || debug_break_level > 0)
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{
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