Fix Line Iterator creation for empty Rope #77
Merged
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Fixes #76.
In #70 I introduced a small oversight in the edge case of an empty
Rope
.I initialized the
Lines
iterator withtotal_lines = 0
.However, the
Lines
iterator always yields atleast a single line (even if that line is empty)which caused the subsequent underflow.
This PR fixes that by setting
total_lines = 1
in the appropriate edge case.I also added a test case to make sure this doesn't regress in the future.