Servo is not bypassing lang_start

$ gdb ./target/debug/servo 
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Reading symbols from ./target/debug/servo...done.
warning: Missing auto-load scripts referenced in section .debug_gdb_scripts
of file /home/michael/Experiments/Rust/servo/target/debug/servo
Use `info auto-load python-scripts [REGEXP]' to list them.
(gdb) b _ZN2rt10lang_start20hc48b7676a10bcd987fAE
Breakpoint 1 at 0x34e4fc0
(gdb) run
Starting program: /home/michael/Experiments/Rust/servo/target/debug/servo 
Missing separate debuginfos, use: dnf debuginfo-install glibc-2.21-13.fc22.x86_64
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".

Breakpoint 1, 0x0000555558a38fc0 in rt::lang_start::hc48b7676a10bcd987fA ()
Missing separate debuginfos, use: dnf debuginfo-install bzip2-libs-1.0.6-14.fc22.x86_64 expat-2.1.0-10.fc22.x86_64 fontconfig-2.11.94-4.fc22.x86_64 freetype-2.5.5-2.fc22.x86_64 glib2-2.44.1-2.fc22.x86_64 graphite2-1.2.4-3.fc22.x86_64 harfbuzz-0.9.40-1.fc22.x86_64 keyutils-libs-1.5.9-4.fc22.x86_64 krb5-libs-1.13.2-13.fc22.x86_64 libcom_err-1.42.12-4.fc22.x86_64 libdrm-2.4.61-3.fc22.x86_64 libffi-3.1-7.fc22.x86_64 libgcc-5.3.1-2.fc22.x86_64 libICE-1.0.9-2.fc22.x86_64 libpng-1.6.19-1.fc22.x86_64 libselinux-2.3-10.fc22.x86_64 libSM-1.2.2-2.fc22.x86_64 libstdc++-5.3.1-2.fc22.x86_64 libuuid-2.26.2-4.fc22.x86_64 libwayland-client-1.7.0-1.fc22.x86_64 libwayland-server-1.7.0-1.fc22.x86_64 libX11-1.6.3-1.fc22.x86_64 libXau-1.0.8-4.fc22.x86_64 libxcb-1.11-8.fc22.x86_64 libXdamage-1.1.4-6.fc22.x86_64 libXext-1.3.3-2.fc22.x86_64 libXfixes-5.0.1-4.fc22.x86_64 libXmu-1.1.2-2.fc22.x86_64 libxshmfence-1.2-1.fc22.x86_64 libXt-1.1.4-10.fc22.x86_64 libXxf86vm-1.1.4-1.fc22.x86_64 mesa-libEGL-10.6.9-1.20151008.fc22.x86_64 mesa-libgbm-10.6.9-1.20151008.fc22.x86_64 mesa-libGL-10.6.9-1.20151008.fc22.x86_64 mesa-libglapi-10.6.9-1.20151008.fc22.x86_64 openssl-libs-1.0.1k-14.fc22.x86_64 pcre-8.38-3.fc22.x86_64 zlib-1.2.8-7.fc22.x86_64
(gdb)