https://issues.dlang.org/show_bug.cgi?id=24557

Steven Schveighoffer <schveiguy@gmail.com> changed:

           What    |Removed                     |Added
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                 CC|                            |schveiguy@gmail.com
           Hardware|x86_64                      |All
                 OS|Linux                       |All

--- Comment #1 from Steven Schveighoffer <schveiguy@gmail.com> ---
readln does use the last character, but it is also validating the "line" ends in the full termination sequence.

However, the bug is that if the last character is repeated in the termination sequence, it checks just the new data that it has read for the termination sequence.

So for example, if you look for `ging` as the termination sequence, the following algorithm results (assume input is `bringing home the bacon`):

1. result = "", readln('g') => "bring". Does "bring" end in "ging"? no
2. result = "bring", readln('g') => "ing". Does "ing" end in "ging"? no
3. result = "bringing", readln('g') => " home the bacon". readln returned no
delim found, so result is "bringing home the bacon"

Instead, readln should check the *concatenated* result (but obviously, only the result that has been appended since the readln call was started.

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