[Bug lto/63688] New: all_symbols_read_handler: Assertion `lto_wrapper_argv' failed.

[james410 at cowgill dot org.uk]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63688

            Bug ID: 63688
           Summary: all_symbols_read_handler: Assertion `lto_wrapper_argv'
                    failed.
           Product: gcc
           Version: 4.9.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: lto
          Assignee: unassigned at gcc dot gnu.org
          Reporter: james410 at cowgill dot org.uk

When invoking ld manually, with the lto plugin, but without passing the
lto_wrapper option, this assertion fails. I know it's stupid to do this, but it
would be nice if a proper message is generated rather than aborting.

To reproduce:
> touch dummy.c
> gcc -c -flto -o dummy.o dummy.c
> ld --plugin=/usr/lib/gcc/mipsel-linux-gnu/4.9.1/liblto_plugin.so dummy.o

Produces:
> ld: ../../src/lto-plugin/lto-plugin.c:622: all_symbols_read_handler: Assertion `lto_wrapper_argv' failed.
> Aborted

Using:
gcc version 4.9.1 (Debian 4.9.1-16)