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jam: jcache: Accept empty input files

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Make new_string_list() initialize the buffer it creates to hold a file's
contents, preventing a segfault later on should jam attempt to parse the
contents of an empty file.

Fixes #15250.

Change-Id: I907dccd26e1ca35fbe07ed6d624b0144487134fe
Reviewed-on: https://review.haiku-os.org/c/buildtools/+/1716
Reviewed-by: waddlesplash <waddlesplash@gmail.com>
This commit is contained in:
Simon South 2019-08-13 16:04:36 -04:00 committed by waddlesplash
parent 86f02e2a45
commit 18e01e2af6
1 changed files with 3 additions and 1 deletions
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jam/jcache.c
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@ -112,7 +112,9 @@ new_string_list(int block_size)
if (block_size <= 0) if (block_size <= 0)
block_size = 5; block_size = 5;
list->block_size = block_size; list->block_size = block_size;
if (!resize_string_list(list, 0)) { if (resize_string_list(list, 0))
*list->strings = 0;
else {
free(list); free(list);
list = 0; list = 0;
} }