diff options
Diffstat (limited to 'io.c')
-rw-r--r-- | io.c | 4 |
1 files changed, 4 insertions, 0 deletions
@@ -482,11 +482,15 @@ io_read(argc, argv, io) } len = NUM2INT(length); + if (len < 0) { + rb_raise(rb_eArgError, "negative length %d given", len); + } GetOpenFile(io, fptr); rb_io_check_readable(fptr); if (feof(fptr->f)) return Qnil; str = rb_str_new(0, len); + if (len == 0) return str; READ_CHECK(fptr->f); n = io_fread(RSTRING(str)->ptr, len, fptr->f); |