llvm-nm error The end of the file was unexpectedly encountered

[etam]

Steps to reproduce:

• clone https://github.com/golemfactory/mandelbrot
• rustup target add wasm32-unknown-emscripten
• cargo build --release

Console output

$ export EMCC_DEBUG=1
$ cargo build --release
   Compiling proc-macro2 v1.0.7
   Compiling unicode-xid v0.2.0
   Compiling syn v1.0.13
   Compiling libc v0.2.66
   Compiling autocfg v1.0.0
   Compiling cc v1.0.50
   Compiling proc-macro2 v0.4.30
   Compiling unicode-xid v0.1.0
   Compiling cfg-if v0.1.10
   Compiling bitflags v1.2.1
   Compiling byteorder v1.3.2
   Compiling ryu v1.0.2
   Compiling failure_derive v0.1.6
   Compiling serde v1.0.104
   Compiling syn v0.15.44
   Compiling unicode-segmentation v1.6.0
   Compiling rustc-demangle v0.1.16
   Compiling crc32fast v1.2.0
   Compiling adler32 v1.0.4
   Compiling unicode-width v0.1.7
   Compiling ansi_term v0.11.0
   Compiling strsim v0.8.0
   Compiling itoa v0.4.4
   Compiling vec_map v0.8.1
   Compiling heck v0.3.1
   Compiling inflate v0.4.5
   Compiling num-traits v0.2.11
   Compiling num-complex v0.2.4
   Compiling textwrap v0.11.0
   Compiling atty v0.2.14
   Compiling quote v1.0.2
   Compiling quote v0.6.13
   Compiling deflate v0.7.20
   Compiling clap v2.33.0
   Compiling png v0.15.3
   Compiling backtrace-sys v0.1.32
   Compiling backtrace v0.3.40
   Compiling synstructure v0.12.3
   Compiling structopt-derive v0.2.18
   Compiling serde_derive v1.0.104
   Compiling structopt v0.2.18
   Compiling failure v0.1.6
   Compiling serde_json v1.0.44
   Compiling gwasm-dispatcher v0.1.0 (https://github.com/golemfactory/gwasm-runner.git#15ddb30b)
   Compiling mandelbrot v0.2.0 (/home/etam/tmp/mandelbrot)
error: linking with `emcc` failed: exit code: 1
  |
  = note: "emcc" "-s" "DISABLE_EXCEPTION_CATCHING=0" "-L" "/home/etam/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/wasm32-unknown-emscripten/lib" "/home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/mandelbrot.mandelbrot.cj0l21d0-cgu.0.rcgu.o" "/home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/mandelbrot.mandelbrot.cj0l21d0-cgu.1.rcgu.o" "/home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/mandelbrot.mandelbrot.cj0l21d0-cgu.10.rcgu.o" "/home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/mandelbrot.mandelbrot.cj0l21d0-cgu.11.rcgu.o" "/home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/mandelbrot.mandelbrot.cj0l21d0-cgu.12.rcgu.o" "/home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/mandelbrot.mandelbrot.cj0l21d0-cgu.13.rcgu.o" "/home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/mandelbrot.mandelbrot.cj0l21d0-cgu.14.rcgu.o" "/home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/mandelbrot.mandelbrot.cj0l21d0-cgu.15.rcgu.o" "/home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/mandelbrot.mandelbrot.cj0l21d0-cgu.2.rcgu.o" "/home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/mandelbrot.mandelbrot.cj0l21d0-cgu.3.rcgu.o" "/home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/mandelbrot.mandelbrot.cj0l21d0-cgu.4.rcgu.o" "/home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/mandelbrot.mandelbrot.cj0l21d0-cgu.5.rcgu.o" "/home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/mandelbrot.mandelbrot.cj0l21d0-cgu.6.rcgu.o" "/home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/mandelbrot.mandelbrot.cj0l21d0-cgu.7.rcgu.o" "/home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/mandelbrot.mandelbrot.cj0l21d0-cgu.8.rcgu.o" "/home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/mandelbrot.mandelbrot.cj0l21d0-cgu.9.rcgu.o" "-o" "/home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/mandelbrot.js" "-s" "EXPORTED_FUNCTIONS=[\"_main\",\"_rust_eh_personality\"]" "/home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/mandelbrot.1rfrl3mew2r8803c.rcgu.o" "-O3" "--memory-init-file" "0" "-g0" "-s" "DEFAULT_LIBRARY_FUNCS_TO_INCLUDE=[]" "-L" "/home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps" "-L" "/home/etam/tmp/mandelbrot/target/release/deps" "-L" "/home/etam/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/wasm32-unknown-emscripten/lib" "/home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/libpng-de5b7bee53fd8754.rlib" "/home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/libdeflate-29ab8f13b60ecaae.rlib" "/home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/libbyteorder-7ba02cffeb4aa4e2.rlib" "/home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/libinflate-9329e8d514927f22.rlib" "/home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/libadler32-58666e44bcb2dcc2.rlib" "/home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/libcrc32fast-76f771a67b511a97.rlib" "/home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/libgwasm_dispatcher-f4aafccc2ad8d437.rlib" "/home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/libserde_json-7070b53e3b937a1c.rlib" "/home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/libryu-e300e02c35513cbf.rlib" "/home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/libitoa-38d6b1be474be5a7.rlib" "/home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/libserde-dafcc7fe83eef608.rlib" "/home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/libfailure-076412769f07d8cf.rlib" "/home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/libbacktrace-97b4a24f4a438417.rlib" "/home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/libcfg_if-532e76cf484c0ad1.rlib" "/home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/librustc_demangle-8a0d82d38445d847.rlib" "/home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/libstructopt-a1802fc697a5d5dd.rlib" "/home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/libclap-fc924e4dcca92395.rlib" "/home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/libvec_map-c58d2c8272dfd24c.rlib" "/home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/libtextwrap-8f3b9cce79399ad2.rlib" "/home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/libunicode_width-da80a37bce84fbf3.rlib" "/home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/libstrsim-14aa47ec8b7faee4.rlib" "/home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/libbitflags-22ef1745bfb3f0f0.rlib" "/home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/libatty-d4114e894fb087cf.rlib" "/home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/liblibc-a0bb6670f2d3073f.rlib" "/home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/libansi_term-ba4c28b82f9218b2.rlib" "/home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/libnum_complex-865ab62f15ba6c27.rlib" "/home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/libnum_traits-f29cec29f1198ab7.rlib" "/home/etam/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/wasm32-unknown-emscripten/lib/libstd-b6414ae168385702.rlib" "/home/etam/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/wasm32-unknown-emscripten/lib/libpanic_unwind-efbc2c947951b8cc.rlib" "/home/etam/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/wasm32-unknown-emscripten/lib/libhashbrown-b177382d9a04ffbe.rlib" "/home/etam/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/wasm32-unknown-emscripten/lib/librustc_std_workspace_alloc-ba7d2244d33447d5.rlib" "/home/etam/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/wasm32-unknown-emscripten/lib/libbacktrace-39569dc87e4ea301.rlib" "/home/etam/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/wasm32-unknown-emscripten/lib/librustc_demangle-f83165e777dccb8d.rlib" "/home/etam/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/wasm32-unknown-emscripten/lib/libunwind-10b085de263b1750.rlib" "/home/etam/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/wasm32-unknown-emscripten/lib/libcfg_if-9a4a22edf44da957.rlib" "/home/etam/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/wasm32-unknown-emscripten/lib/liblibc-68fabc677efa98de.rlib" "/home/etam/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/wasm32-unknown-emscripten/lib/liballoc-026dc0061b48e8b6.rlib" "/home/etam/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/wasm32-unknown-emscripten/lib/librustc_std_workspace_core-7bf75bb619341145.rlib" "/home/etam/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/wasm32-unknown-emscripten/lib/libcore-ef54709e300503ed.rlib" "/home/etam/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/wasm32-unknown-emscripten/lib/libcompiler_builtins-4ed27d8420cb4abc.rlib" "-l" "c" "-l" "c" "-s" "BINARYEN_ASYNC_COMPILATION=0" "-s" "ALLOW_MEMORY_GROWTH=1" "-s" "ERROR_ON_UNDEFINED_SYMBOLS=1" "-s" "ASSERTIONS=1" "-s" "ABORTING_MALLOC=0" "-Wl,--fatal-warnings"
  = note: shared:DEBUG: EM_CONFIG is located in /home/etam/.emscripten
          shared:DEBUG: JAVA not defined in /home/etam/.emscripten, using "java"
          cache:DEBUG: PID 30179 acquiring multiprocess file lock to Emscripten cache at /home/etam/.emscripten_cache
          cache:DEBUG: done
          cache:DEBUG: PID 30179 released multiprocess file lock to Emscripten cache at /home/etam/.emscripten_cache
          shared:DEBUG: check tells us to use wasm backend
          emcc:WARNING: invocation: /home/etam/code/github/emscripten-core/emsdk/upstream/emscripten/emcc.py -s DISABLE_EXCEPTION_CATCHING=0 -L /home/etam/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/wasm32-unknown-emscripten/lib /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/mandelbrot.mandelbrot.cj0l21d0-cgu.0.rcgu.o /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/mandelbrot.mandelbrot.cj0l21d0-cgu.1.rcgu.o /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/mandelbrot.mandelbrot.cj0l21d0-cgu.10.rcgu.o /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/mandelbrot.mandelbrot.cj0l21d0-cgu.11.rcgu.o /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/mandelbrot.mandelbrot.cj0l21d0-cgu.12.rcgu.o /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/mandelbrot.mandelbrot.cj0l21d0-cgu.13.rcgu.o /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/mandelbrot.mandelbrot.cj0l21d0-cgu.14.rcgu.o /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/mandelbrot.mandelbrot.cj0l21d0-cgu.15.rcgu.o /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/mandelbrot.mandelbrot.cj0l21d0-cgu.2.rcgu.o /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/mandelbrot.mandelbrot.cj0l21d0-cgu.3.rcgu.o /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/mandelbrot.mandelbrot.cj0l21d0-cgu.4.rcgu.o /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/mandelbrot.mandelbrot.cj0l21d0-cgu.5.rcgu.o /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/mandelbrot.mandelbrot.cj0l21d0-cgu.6.rcgu.o /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/mandelbrot.mandelbrot.cj0l21d0-cgu.7.rcgu.o /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/mandelbrot.mandelbrot.cj0l21d0-cgu.8.rcgu.o /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/mandelbrot.mandelbrot.cj0l21d0-cgu.9.rcgu.o -o /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/mandelbrot.js -s EXPORTED_FUNCTIONS=["_main","_rust_eh_personality"] /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/mandelbrot.1rfrl3mew2r8803c.rcgu.o -O3 --memory-init-file 0 -g0 -s DEFAULT_LIBRARY_FUNCS_TO_INCLUDE=[] -L /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps -L /home/etam/tmp/mandelbrot/target/release/deps -L /home/etam/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/wasm32-unknown-emscripten/lib /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/libpng-de5b7bee53fd8754.rlib /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/libdeflate-29ab8f13b60ecaae.rlib /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/libbyteorder-7ba02cffeb4aa4e2.rlib /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/libinflate-9329e8d514927f22.rlib /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/libadler32-58666e44bcb2dcc2.rlib /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/libcrc32fast-76f771a67b511a97.rlib /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/libgwasm_dispatcher-f4aafccc2ad8d437.rlib /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/libserde_json-7070b53e3b937a1c.rlib /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/libryu-e300e02c35513cbf.rlib /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/libitoa-38d6b1be474be5a7.rlib /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/libserde-dafcc7fe83eef608.rlib /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/libfailure-076412769f07d8cf.rlib /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/libbacktrace-97b4a24f4a438417.rlib /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/libcfg_if-532e76cf484c0ad1.rlib /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/librustc_demangle-8a0d82d38445d847.rlib /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/libstructopt-a1802fc697a5d5dd.rlib /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/libclap-fc924e4dcca92395.rlib /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/libvec_map-c58d2c8272dfd24c.rlib /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/libtextwrap-8f3b9cce79399ad2.rlib /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/libunicode_width-da80a37bce84fbf3.rlib /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/libstrsim-14aa47ec8b7faee4.rlib /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/libbitflags-22ef1745bfb3f0f0.rlib /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/libatty-d4114e894fb087cf.rlib /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/liblibc-a0bb6670f2d3073f.rlib /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/libansi_term-ba4c28b82f9218b2.rlib /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/libnum_complex-865ab62f15ba6c27.rlib /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/libnum_traits-f29cec29f1198ab7.rlib /home/etam/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/wasm32-unknown-emscripten/lib/libstd-b6414ae168385702.rlib /home/etam/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/wasm32-unknown-emscripten/lib/libpanic_unwind-efbc2c947951b8cc.rlib /home/etam/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/wasm32-unknown-emscripten/lib/libhashbrown-b177382d9a04ffbe.rlib /home/etam/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/wasm32-unknown-emscripten/lib/librustc_std_workspace_alloc-ba7d2244d33447d5.rlib /home/etam/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/wasm32-unknown-emscripten/lib/libbacktrace-39569dc87e4ea301.rlib /home/etam/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/wasm32-unknown-emscripten/lib/librustc_demangle-f83165e777dccb8d.rlib /home/etam/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/wasm32-unknown-emscripten/lib/libunwind-10b085de263b1750.rlib /home/etam/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/wasm32-unknown-emscripten/lib/libcfg_if-9a4a22edf44da957.rlib /home/etam/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/wasm32-unknown-emscripten/lib/liblibc-68fabc677efa98de.rlib /home/etam/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/wasm32-unknown-emscripten/lib/liballoc-026dc0061b48e8b6.rlib /home/etam/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/wasm32-unknown-emscripten/lib/librustc_std_workspace_core-7bf75bb619341145.rlib /home/etam/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/wasm32-unknown-emscripten/lib/libcore-ef54709e300503ed.rlib /home/etam/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/wasm32-unknown-emscripten/lib/libcompiler_builtins-4ed27d8420cb4abc.rlib -l c -l c -s BINARYEN_ASYNC_COMPILATION=0 -s ALLOW_MEMORY_GROWTH=1 -s ERROR_ON_UNDEFINED_SYMBOLS=1 -s ASSERTIONS=1 -s ABORTING_MALLOC=0 -Wl,--fatal-warnings  (in /home/etam/tmp/mandelbrot)
          shared:DEBUG: successfully executed /home/etam/code/github/emscripten-core/emsdk/upstream/bin/clang++ --version
          root:DEBUG: Checking JS engine ['/home/etam/code/github/emscripten-core/emsdk/node/12.9.1_64bit/bin/node']
          shared:DEBUG: successfully executed /home/etam/code/github/emscripten-core/emsdk/node/12.9.1_64bit/bin/node --version
          shared:DEBUG: successfully executed /home/etam/code/github/emscripten-core/emsdk/upstream/bin/llc --version
          shared:INFO: (Emscripten: Running sanity checks)
          shared:DEBUG: successfully executed java -version
          shared:DEBUG: Option -s BINARYEN_ASYNC_COMPILATION=0 has been removed from the codebase. (setting renamed to WASM_ASYNC_COMPILATION)
          shared:WARNING: ignoring unsupported linker flag: `--fatal-warnings`
          emcc:DEBUG: asm.js opts not forced by user or an option that depends them, and we do not intend to run the asm.js, so disabling and leaving opts to the binaryen optimizer
          emcc:DEBUG: compiling to bitcode
          emcc:DEBUG: emcc step "parse arguments and setup" took 0.16 seconds
          cache:DEBUG: PID 30179 acquiring multiprocess file lock to Emscripten cache at /home/etam/.emscripten_cache/wasm-obj
          cache:DEBUG: done
          emcc:DEBUG: using object file: /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/mandelbrot.mandelbrot.cj0l21d0-cgu.0.rcgu.o
          emcc:DEBUG: using object file: /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/mandelbrot.mandelbrot.cj0l21d0-cgu.1.rcgu.o
          emcc:DEBUG: using object file: /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/mandelbrot.mandelbrot.cj0l21d0-cgu.10.rcgu.o
          emcc:DEBUG: using object file: /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/mandelbrot.mandelbrot.cj0l21d0-cgu.11.rcgu.o
          emcc:DEBUG: using object file: /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/mandelbrot.mandelbrot.cj0l21d0-cgu.12.rcgu.o
          emcc:DEBUG: using object file: /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/mandelbrot.mandelbrot.cj0l21d0-cgu.13.rcgu.o
          emcc:DEBUG: using object file: /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/mandelbrot.mandelbrot.cj0l21d0-cgu.14.rcgu.o
          emcc:DEBUG: using object file: /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/mandelbrot.mandelbrot.cj0l21d0-cgu.15.rcgu.o
          emcc:DEBUG: using object file: /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/mandelbrot.mandelbrot.cj0l21d0-cgu.2.rcgu.o
          emcc:DEBUG: using object file: /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/mandelbrot.mandelbrot.cj0l21d0-cgu.3.rcgu.o
          emcc:DEBUG: using object file: /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/mandelbrot.mandelbrot.cj0l21d0-cgu.4.rcgu.o
          emcc:DEBUG: using object file: /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/mandelbrot.mandelbrot.cj0l21d0-cgu.5.rcgu.o
          emcc:DEBUG: using object file: /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/mandelbrot.mandelbrot.cj0l21d0-cgu.6.rcgu.o
          emcc:DEBUG: using object file: /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/mandelbrot.mandelbrot.cj0l21d0-cgu.7.rcgu.o
          emcc:DEBUG: using object file: /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/mandelbrot.mandelbrot.cj0l21d0-cgu.8.rcgu.o
          emcc:DEBUG: using object file: /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/mandelbrot.mandelbrot.cj0l21d0-cgu.9.rcgu.o
          emcc:DEBUG: using object file: /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/mandelbrot.1rfrl3mew2r8803c.rcgu.o
          emcc:DEBUG: using static library: /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/libpng-de5b7bee53fd8754.rlib
          no symbols
          no symbols
          shared:DEBUG: successfully executed /home/etam/code/github/emscripten-core/emsdk/upstream/bin/llvm-nm --print-armap /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/libpng-de5b7bee53fd8754.rlib
          emcc:DEBUG: using static library: /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/libdeflate-29ab8f13b60ecaae.rlib
          no symbols
          no symbols
          shared:DEBUG: successfully executed /home/etam/code/github/emscripten-core/emsdk/upstream/bin/llvm-nm --print-armap /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/libdeflate-29ab8f13b60ecaae.rlib
          emcc:DEBUG: using static library: /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/libbyteorder-7ba02cffeb4aa4e2.rlib
          no symbols
          no symbols
          shared:DEBUG: successfully executed /home/etam/code/github/emscripten-core/emsdk/upstream/bin/llvm-nm --print-armap /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/libbyteorder-7ba02cffeb4aa4e2.rlib
          emcc:DEBUG: using static library: /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/libinflate-9329e8d514927f22.rlib
          no symbols
          no symbols
          shared:DEBUG: successfully executed /home/etam/code/github/emscripten-core/emsdk/upstream/bin/llvm-nm --print-armap /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/libinflate-9329e8d514927f22.rlib
          emcc:DEBUG: using static library: /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/libadler32-58666e44bcb2dcc2.rlib
          no symbols
          /home/etam/code/github/emscripten-core/emsdk/upstream/bin/llvm-nm: error: /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/libadler32-58666e44bcb2dcc2.rlib(rust.metadata.bin) The end of the file was unexpectedly encountered
          
          cache:DEBUG: PID 30179 released multiprocess file lock to Emscripten cache at /home/etam/.emscripten_cache/wasm-obj
          Traceback (most recent call last):
            File "/home/etam/code/github/emscripten-core/emsdk/upstream/emscripten/emcc.py", line 3748, in <module>
              sys.exit(run(sys.argv))
            File "/home/etam/code/github/emscripten-core/emsdk/upstream/emscripten/emcc.py", line 1993, in run
              ensure_archive_index(input_file)
            File "/home/etam/code/github/emscripten-core/emsdk/upstream/emscripten/emcc.py", line 476, in ensure_archive_index
              stdout = run_process([shared.LLVM_NM, '--print-armap', archive_file], stdout=PIPE).stdout
            File "/home/etam/code/github/emscripten-core/emsdk/upstream/emscripten/tools/shared.py", line 195, in run_process
              result.check_returncode()
            File "/home/etam/code/github/emscripten-core/emsdk/upstream/emscripten/tools/shared.py", line 168, in check_returncode
              raise Py2CalledProcessError(returncode=self.returncode, cmd=self.args, output=self.stdout, stderr=self.stderr)
          tools.shared.Py2CalledProcessError: Command '['/home/etam/code/github/emscripten-core/emsdk/upstream/bin/llvm-nm', '--print-armap', '/home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/libadler32-58666e44bcb2dcc2.rlib']' returned non-zero exit status 1
          

error: aborting due to previous error

error: could not compile `mandelbrot`.

To learn more, run the command again with --verbose.

/tmp/emscripten_temp/ is empty

Environment

$ emcc -v
emcc (Emscripten gcc/clang-like replacement + linker emulating GNU ld) 1.39.5
clang version 10.0.0 (/b/s/w/ir/cache/git/chromium.googlesource.com-external-github.com-llvm-llvm--project be2b7ea89ab43d6827634fbdbbd2661e1f242527)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /home/etam/code/github/emscripten-core/emsdk/upstream/bin
Found candidate GCC installation: /usr/lib64/gcc/x86_64-suse-linux/9
Selected GCC installation: /usr/lib64/gcc/x86_64-suse-linux/9
Candidate multilib: .;@m64
Selected multilib: .;@m64

Additional info

With emscripten 1.39.0 and 1.39.1 it compiles fine. Versions 1.39.2 and later are affected.

[etam]

Additional interesting info: After a failed build with 1.39.5 I downgraded emscripten to 1.39.1, rerun compilation without removing target directory and it worked fine. So it seems that the problem is not with how /home/etam/tmp/mandelbrot/target/wasm32-unknown-emscripten/release/deps/libadler32-58666e44bcb2dcc2.rlib(rust.metadata.bin) is created, but how it's read by llvm-nm.

[tlively]

@sbc100 I thought we had fixed the issue with llvm-nm erroring out trying to read the rust.metadata.bin file in Rust libraries, but it looks like it has regressed. It would be good to add a test that links a Rust library to make sure this doesn't break.

[sbc100]

I think it must of been #9758 where we added support for automatically adding archive indexes.

[sbc100]

Maybe the best solution is to write my own archive header parser to detect the missing index.

[sbc100]

I thought we had a test for this. WIll add one.

[sbc100]

I can't seem to reproduce this when adding random text files to the archive.

Can you send me this .bin file so I can see what it is that is confusing llvm-nm?

[etam]

libadler32-58666e44bcb2dcc2-rust.metadata.bin.zip

[sbc100]

The problem seems to be that rust metadata files start with two null bytes which means llvm thinks they are COFF files. Doh.

I filed an llvm bug to try to get that fixed by I'm not sure it will land: https://bugs.llvm.org/show_bug.cgi?id=44683

In the mean time if looks like rust fixed this upstream too: rust-lang/rust#66235

I'm not sure how or when that change to rust-lang makes it into your toolchain but this problem should go away once it does.

[sbc100]

Should be fixed in #10300