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fix #442 - Prevent crash when cursor is in the middle of a UTF sequence

This commit is contained in:
Basile Burg 2018-02-24 12:29:23 +01:00
parent d6ce0a2f7b
commit 7e70c26faa
4 changed files with 14 additions and 1 deletions
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9
src/dcd/server/autocomplete/complete.d
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@ -114,8 +114,15 @@ AutocompleteResponse dotCompletion(T)(T beforeTokens, const(Token)[] tokenArray,
// of at the end
auto t = beforeTokens[$ - 1];
if (cursorPosition - t.index >= 0 && cursorPosition - t.index <= t.text.length)
{
partial = t.text[0 .. cursorPosition - t.index];
significantTokenType = tok!"identifier";
// issue 442 - prevent `partial` to start in the middle of a MBC
// since later there's a non-nothrow call to `toUpper`
import std.utf : validate, UTFException;
try validate(partial);
catch (UTFException) partial = "";
}
significantTokenType = partial.length ? tok!"identifier" : tok!"";
beforeTokens = beforeTokens[0 .. $ - 1];
}
else if (beforeTokens.length >= 2 && beforeTokens[$ - 1] == tok!".")

0
tests/tc_middle_of_utf/expected1.txt Normal file
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1
tests/tc_middle_of_utf/file.d Normal file
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@ -0,0 +1 @@
ß

5
tests/tc_middle_of_utf/run.sh Executable file
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@ -0,0 +1,5 @@
set -e
set -u
../../bin/dcd-client $1 file.d -c1 > actual1.txt
diff actual1.txt expected1.txt