Description of problem:
Builds using rust-1.29.2 are failing to find some backtrace symbols on armv7hl only.  This appears to be some corruption of the objects in libstd.rlib (an "ar" archive).  The same Rust version is fine on F29, and the prior 1.29.1 was also fine on rawhide.

I'm not sure where the problem lies, so I'm just starting it on binutils.  The compiler bootstrapped itself fine, and the %check results look typical, so I suspect the problem is something in post-install.

Version-Release number of selected component (if applicable):
A few that seem relevant, different from the prior build:
annobin-8.53-1.fc30.armv7hl
binutils-2.31.1-14.fc30.armv7hl
rpm-4.14.2-7.fc30.armv7hl
rust-1.29.2-3.fc30.armv7hl
cargo-1.29.0-3.fc30.armv7hl

How reproducible:
100%

Steps to Reproduce:
1. cargo new hello
2. cd hello/
3. cargo run

Actual results:
   Compiling hello v0.1.0 (file:///tmp/hello)
error: linking with `cc` failed: exit code: 1
  |
  = note: "cc" "-Wl,--as-needed" "-Wl,-z,noexecstack" "-L" "/usr/lib/rustlib/armv7-unknown-linux-gnueabihf/lib" "/tmp/hello/target/debug/deps/hello-7b8f6b0cd67c5190.1y16o1qfye96o7m0.rcgu.o" "/tmp/hello/target/debug/deps/hello-7b8f6b0cd67c5190.3rngp6bm2u2q5z0y.rcgu.o" "/tmp/hello/target/debug/deps/hello-7b8f6b0cd67c5190.4oc10dk278mpk1vy.rcgu.o" "/tmp/hello/target/debug/deps/hello-7b8f6b0cd67c5190.4xq48u46a1pwiqn7.rcgu.o" "/tmp/hello/target/debug/deps/hello-7b8f6b0cd67c5190.544l4wfz89vbhoea.rcgu.o" "/tmp/hello/target/debug/deps/hello-7b8f6b0cd67c5190.oa3rad818d8sgn4.rcgu.o" "-o" "/tmp/hello/target/debug/deps/hello-7b8f6b0cd67c5190" "/tmp/hello/target/debug/deps/hello-7b8f6b0cd67c5190.crate.allocator.rcgu.o" "-Wl,--gc-sections" "-pie" "-Wl,-zrelro" "-Wl,-znow" "-nodefaultlibs" "-L" "/tmp/hello/target/debug/deps" "-L" "/usr/lib/rustlib/armv7-unknown-linux-gnueabihf/lib" "-Wl,--start-group" "-Wl,-Bstatic" "/usr/lib/rustlib/armv7-unknown-linux-gnueabihf/lib/libstd-3c1ac0c18307a26c.rlib" "/usr/lib/rustlib/armv7-unknown-linux-gnueabihf/lib/libpanic_unwind-0cd8db65cd5cad8a.rlib" "/usr/lib/rustlib/armv7-unknown-linux-gnueabihf/lib/libunwind-af4f624361145583.rlib" "/usr/lib/rustlib/armv7-unknown-linux-gnueabihf/lib/liballoc_system-23381d84007bc683.rlib" "/usr/lib/rustlib/armv7-unknown-linux-gnueabihf/lib/liblibc-3742de2bfa3f3f57.rlib" "/usr/lib/rustlib/armv7-unknown-linux-gnueabihf/lib/liballoc-ec50fb91ce9425e4.rlib" "/usr/lib/rustlib/armv7-unknown-linux-gnueabihf/lib/libcore-6957c9e80cf7e5a1.rlib" "-Wl,--end-group" "/usr/lib/rustlib/armv7-unknown-linux-gnueabihf/lib/libcompiler_builtins-362a06d915f1aff9.rlib" "-Wl,-Bdynamic" "-ldl" "-lrt" "-lpthread" "-lgcc_s" "-lc" "-lm" "-lrt" "-lpthread" "-lutil" "-lutil"
  = note: /usr/bin/ld: /usr/lib/rustlib/armv7-unknown-linux-gnueabihf/lib/libstd-3c1ac0c18307a26c.rlib(std-3c1ac0c18307a26c.std6-dc336450c6219793961ba7e2856ac46a.rs.rcgu.o): in function `std::sys_common::gnu::libbacktrace::foreach_symbol_fileline':
          (.text._ZN3std10sys_common3gnu12libbacktrace23foreach_symbol_fileline17ha2c26b6688d38548E+0x1ac): undefined reference to `backtrace_create_state'
          /usr/bin/ld: (.text._ZN3std10sys_common3gnu12libbacktrace23foreach_symbol_fileline17ha2c26b6688d38548E+0x1f0): undefined reference to `backtrace_pcinfo'
          /usr/bin/ld: /usr/lib/rustlib/armv7-unknown-linux-gnueabihf/lib/libstd-3c1ac0c18307a26c.rlib(std-3c1ac0c18307a26c.std6-dc336450c6219793961ba7e2856ac46a.rs.rcgu.o): in function `std::sys_common::gnu::libbacktrace::resolve_symname':
          (.text._ZN3std10sys_common3gnu12libbacktrace15resolve_symname17hb530d56ed4464aa6E+0xa0): undefined reference to `backtrace_create_state'
          /usr/bin/ld: (.text._ZN3std10sys_common3gnu12libbacktrace15resolve_symname17hb530d56ed4464aa6E+0xdc): undefined reference to `backtrace_syminfo'
          /usr/bin/ld: /usr/lib/rustlib/armv7-unknown-linux-gnueabihf/lib/libstd-3c1ac0c18307a26c.rlib(std-3c1ac0c18307a26c.std6-dc336450c6219793961ba7e2856ac46a.rs.rcgu.o): in function `std::sys_common::gnu::libbacktrace::resolve_symname':
          (.text._ZN3std10sys_common3gnu12libbacktrace15resolve_symname17hef4dabc6efa56fd3E+0xa0): undefined reference to `backtrace_create_state'
          /usr/bin/ld: (.text._ZN3std10sys_common3gnu12libbacktrace15resolve_symname17hef4dabc6efa56fd3E+0xdc): undefined reference to `backtrace_syminfo'
          collect2: error: ld returned 1 exit status


error: aborting due to previous error

error: Could not compile `hello`.


Expected results:
Hello, world!

Additional info:
Using "nm" on the bad libstd.rlib shows errors that aren't present on the working builds.

$ nm usr/lib/rustlib/armv7-unknown-linux-gnueabihf/lib/libstd-3c1ac0c18307a26c.rlib >/dev/null
nm: usr/lib/rustlib/armv7-unknown-linux-gnueabihf/lib/libstd-3c1ac0c18307a26c.rlib(alloc.o): no group info for section .ARM.exidx.text.backtrace_alloc
nm: usr/lib/rustlib/armv7-unknown-linux-gnueabihf/lib/libstd-3c1ac0c18307a26c.rlib(alloc.o): unknown type [0x70000001] section `.ARM.exidx.text.backtrace_alloc'
nm: alloc.o: Bad value
nm: usr/lib/rustlib/armv7-unknown-linux-gnueabihf/lib/libstd-3c1ac0c18307a26c.rlib(backtrace.o): no group info for section .ARM.exidx.text.unwind
nm: usr/lib/rustlib/armv7-unknown-linux-gnueabihf/lib/libstd-3c1ac0c18307a26c.rlib(backtrace.o): unknown type [0x70000001] section `.ARM.exidx.text.unwind'
nm: backtrace.o: Bad value
...

Here are the Rust builds:
GOOD rust-1.29.1-2.fc30: https://koji.fedoraproject.org/koji/buildinfo?buildID=1147651
BAD  rust-1.29.2-3.fc30: https://koji.fedoraproject.org/koji/buildinfo?buildID=1152959
GOOD rust-1.29.2-3.fc29: https://koji.fedoraproject.org/koji/buildinfo?buildID=1153010

Buildroot differences that look significant:
binutils 2.31.1-13.fc30 -> 2.31.1-14.fc30
annobin 8.41-1.fc30 -> 8.53-1.fc30
rpm 4.14.2-1.fc30 -> 4.14.2-7.fc30

Build that failed to use rustc on armv7hl:
rust-syn-0.15.11-1.fc30: https://koji.fedoraproject.org/koji/taskinfo?taskID=30252014