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Fix crash in Python backend when using empty docstrings

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Due to confusion in build_combined_docstring(), we could call
DohDelete() on the "feature:docstring" string, which resulted in a crash
when trying to use it later.

Fix this and simplify the code at the same time by ensuring that we
always use a copy of "feature:docstring" if it's not empty or don't use
it at all if it's empty -- like this we don't have to check for its
length each time before using it.

Closes #1648.
This commit is contained in:
Vadim Zeitlin 2020-01-25 17:06:20 +01:00
commit e14532ce52
3 changed files with 22 additions and 4 deletions
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9
Examples/test-suite/autodoc.i
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@ -183,3 +183,12 @@ const int PROCESS_DEFAULT_VALUE = 17;
typedef long int some_type;
int process_complex_defval(int val = PROCESS_DEFAULT_VALUE, int factor = some_type(-1)) { return val*factor; }
%}
// Test for empty docstring, which should be ignored.
%feature("docstring") ""
%inline %{
struct a_structure{
char my_array[1];
};
%}