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The following code is problematic (mono/mini/mini.c, @@ -3659,7 +3659,8 @@ mono_save_seq_point_info (MonoCompile *cfg))
info = g_malloc0 (sizeof (MonoSeqPointInfo) + (cfg->seq_points->len - MONO_ZERO_LEN_ARRAY) * sizeof (SeqPoint));
cfg->seq_points->len is 0
MONO_ZERO_LEN_ARRAY is not 0
leads to an overflow of (cfg->seq_points->len - MONO_ZERO_LEN_ARRAY).
Check size of cfg->seq_points->len.
If MONO_ZERO_LEN_ARRAY is not 0, then MonoSeqPointInfo itself contains the first array element.
Fixed. Thanks for the report.