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authorLibravatar Taylor Blau <me@ttaylorr.com>2021-07-19 13:18:49 -0400
committerLibravatar Junio C Hamano <gitster@pobox.com>2021-07-19 15:24:01 -0700
commit88617d11f9d2ee1ea726cef4527d676a9a46fa63 (patch)
treeaf4a1eb9295906c3127654c51cc7a75b4433f153 /builtin/apply.c
parentmidx.c: improve cache locality in midx_pack_order_cmp() (diff)
downloadtgif-88617d11f9d2ee1ea726cef4527d676a9a46fa63.tar.xz
multi-pack-index: fix potential segfault without sub-command
Since cd57bc41bb (builtin/multi-pack-index.c: display usage on unrecognized command, 2021-03-30) we have used a "usage" label to avoid having two separate callers of usage_with_options (one when no arguments are given, and another for unrecognized sub-commands). But the first caller has been broken since cd57bc41bb, since it will happily jump to usage without arguments, and then pass argv[0] to the "unrecognized subcommand" error. Many compilers will save us from a segfault here, but the end result is ugly, since it mentions an unrecognized subcommand when we didn't even pass one, and (on GCC) includes "(null)" in its output. Move the "usage" label down past the error about unrecognized subcommands so that it is only triggered when it should be. While we're at it, bulk up our test coverage in this area, too. Signed-off-by: Taylor Blau <me@ttaylorr.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
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