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xdiff/xprepare: initialise xdlclassifier_t cf in xdl_prepare_env()
Ensure that the xdl_free_classifier() call on xdlclassifier_t cf is safe even if xdl_init_classifier() isn't called. This may occur in the case where diff is run with --histogram and a call to, say, xdl_prepare_ctx() fails. Signed-off-by: Tay Ray Chuan <rctay89@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
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@ -239,6 +239,8 @@ int xdl_prepare_env(mmfile_t *mf1, mmfile_t *mf2, xpparam_t const *xpp,
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long enl1, enl2, sample;
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xdlclassifier_t cf;
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memset(&cf, 0, sizeof(cf));
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/*
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* For histogram diff, we can afford a smaller sample size and
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* thus a poorer estimate of the number of lines, as the hash
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