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Fix for text storage objects setting their content to their own immutable proxy

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This commit is contained in:
Richard Frith-Macdonald 2020-11-21 08:23:53 +00:00
parent 1170e0c0c1
commit 5ec87d80b4
1 changed files with 4 additions and 2 deletions
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6
Source/GSString.m
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@ -5401,6 +5401,9 @@ NSAssert(_flags.owned == 1 && _zone != 0, NSInternalInconsistencyException);
* saving and restoring the character which would be
* overwritten by the nul, or by getting a character less,
* and fetching the last character separately.
* NB. There is a possibility that aString may be an immutable
* proxy to the receiver, so we must take care to save the
* character before making any changes.
*/
if (aRange.location + length < _count)
{
@ -5415,7 +5418,7 @@ NSAssert(_flags.owned == 1 && _zone != 0, NSInternalInconsistencyException);
{
unsigned int l = length - 1;
unsigned int size = 1;
unichar u;
unichar u = [aString characterAtIndex: l];
unsigned char *dst = &_contents.c[aRange.location + l];
if (l > 0)
@ -5424,7 +5427,6 @@ NSAssert(_flags.owned == 1 && _zone != 0, NSInternalInconsistencyException);
maxLength: l+1
encoding: internalEncoding];
}
u = [aString characterAtIndex: l];
GSFromUnicode(&dst, &size, &u, 1,
internalEncoding, 0, GSUniStrict);
}