llc crashes linking regex test suite under emscripten

[brson]

130 brian@ip-10-145-43-250:/mnt2/dev/regex⟫ cargo +rust1 test --target=asmjs-unknown-emscripten --no-run
   Compiling regex v0.1.80 (file:///mnt2/dev/regex)
*** Error in `/mnt2/dev/emsdk_portable/clang/fastcomp/build_incoming_64/bin/llc': munmap_chunk(): invalid pointer: 0x0000000006a37428 ***
======= Backtrace: =========
/lib/x86_64-linux-gnu/libc.so.6(+0x77725)[0x7fb45c00e725]
/lib/x86_64-linux-gnu/libc.so.6(cfree+0x1a8)[0x7fb45c01ac18]
/mnt2/dev/emsdk_portable/clang/fastcomp/build_incoming_64/bin/llc(_ZN4llvm15LLVMContextImplD2Ev+0x2b6f)[0xb9746f]
/mnt2/dev/emsdk_portable/clang/fastcomp/build_incoming_64/bin/llc(_ZN4llvm11LLVMContextD1Ev+0x14)[0xb8e264]
/mnt2/dev/emsdk_portable/clang/fastcomp/build_incoming_64/bin/llc(main+0x157)[0x564d67]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf0)[0x7fb45bfb7830]
/mnt2/dev/emsdk_portable/clang/fastcomp/build_incoming_64/bin/llc(_start+0x29)[0x584ec9]
======= Memory map: ========
00400000-0146b000 r-xp 00000000 ca:50 4075774                            /mnt2/dev/emsdk_portable/clang/fastcomp/build_incoming_64/bin/llc
0166b000-0177e000 r--p 0106b000 ca:50 4075774                            /mnt2/dev/emsdk_portable/clang/fastcomp/build_incoming_64/bin/llc
0177e000-01780000 rw-p 0117e000 ca:50 4075774                            /mnt2/dev/emsdk_portable/clang/fastcomp/build_incoming_64/bin/llc
01780000-0179a000 rw-p 00000000 00:00 0
02d10000-07017000 rw-p 00000000 00:00 0                                  [heap]
7fb45aafc000-7fb45b2fe000 rw-p 00000000 00:00 0
7fb45bd56000-7fb45bf97000 rw-p 00000000 00:00 0
7fb45bf97000-7fb45c157000 r-xp 00000000 ca:01 132988                     /lib/x86_64-linux-gnu/libc-2.23.so
7fb45c157000-7fb45c356000 ---p 001c0000 ca:01 132988                     /lib/x86_64-linux-gnu/libc-2.23.so
7fb45c356000-7fb45c35a000 r--p 001bf000 ca:01 132988                     /lib/x86_64-linux-gnu/libc-2.23.so
7fb45c35a000-7fb45c35c000 rw-p 001c3000 ca:01 132988                     /lib/x86_64-linux-gnu/libc-2.23.so
7fb45c35c000-7fb45c360000 rw-p 00000000 00:00 0
7fb45c360000-7fb45c376000 r-xp 00000000 ca:01 133006                     /lib/x86_64-linux-gnu/libgcc_s.so.1
7fb45c376000-7fb45c575000 ---p 00016000 ca:01 133006                     /lib/x86_64-linux-gnu/libgcc_s.so.1
7fb45c575000-7fb45c576000 rw-p 00015000 ca:01 133006                     /lib/x86_64-linux-gnu/libgcc_s.so.1
7fb45c576000-7fb45c67e000 r-xp 00000000 ca:01 133023                     /lib/x86_64-linux-gnu/libm-2.23.so
7fb45c67e000-7fb45c87d000 ---p 00108000 ca:01 133023                     /lib/x86_64-linux-gnu/libm-2.23.so
7fb45c87d000-7fb45c87e000 r--p 00107000 ca:01 133023                     /lib/x86_64-linux-gnu/libm-2.23.so
7fb45c87e000-7fb45c87f000 rw-p 00108000 ca:01 133023                     /lib/x86_64-linux-gnu/libm-2.23.so
7fb45c87f000-7fb45c9f1000 r-xp 00000000 ca:01 7972                       /usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.21
7fb45c9f1000-7fb45cbf1000 ---p 00172000 ca:01 7972                       /usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.21
7fb45cbf1000-7fb45cbfb000 r--p 00172000 ca:01 7972                       /usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.21
7fb45cbfb000-7fb45cbfd000 rw-p 0017c000 ca:01 7972                       /usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.21
7fb45cbfd000-7fb45cc01000 rw-p 00000000 00:00 0
7fb45cc01000-7fb45cc1a000 r-xp 00000000 ca:01 133077                     /lib/x86_64-linux-gnu/libz.so.1.2.8
7fb45cc1a000-7fb45ce19000 ---p 00019000 ca:01 133077                     /lib/x86_64-linux-gnu/libz.so.1.2.8
7fb45ce19000-7fb45ce1a000 r--p 00018000 ca:01 133077                     /lib/x86_64-linux-gnu/libz.so.1.2.8
7fb45ce1a000-7fb45ce1b000 rw-p 00019000 ca:01 133077                     /lib/x86_64-linux-gnu/libz.so.1.2.8
7fb45ce1b000-7fb45ce1e000 r-xp 00000000 ca:01 132999                     /lib/x86_64-linux-gnu/libdl-2.23.so
7fb45ce1e000-7fb45d01d000 ---p 00003000 ca:01 132999                     /lib/x86_64-linux-gnu/libdl-2.23.so
7fb45d01d000-7fb45d01e000 r--p 00002000 ca:01 132999                     /lib/x86_64-linux-gnu/libdl-2.23.so
7fb45d01e000-7fb45d01f000 rw-p 00003000 ca:01 132999                     /lib/x86_64-linux-gnu/libdl-2.23.so
7fb45d01f000-7fb45d037000 r-xp 00000000 ca:01 133054                     /lib/x86_64-linux-gnu/libpthread-2.23.so
7fb45d037000-7fb45d236000 ---p 00018000 ca:01 133054                     /lib/x86_64-linux-gnu/libpthread-2.23.so
7fb45d236000-7fb45d237000 r--p 00017000 ca:01 133054                     /lib/x86_64-linux-gnu/libpthread-2.23.so
7fb45d237000-7fb45d238000 rw-p 00018000 ca:01 133054                     /lib/x86_64-linux-gnu/libpthread-2.23.so
7fb45d238000-7fb45d23c000 rw-p 00000000 00:00 0
7fb45d23c000-7fb45d262000 r-xp 00000000 ca:01 132976                     /lib/x86_64-linux-gnu/ld-2.23.so
7fb45d427000-7fb45d44f000 rw-p 00000000 00:00 0
7fb45d45e000-7fb45d461000 rw-p 00000000 00:00 0
7fb45d461000-7fb45d462000 r--p 00025000 ca:01 132976                     /lib/x86_64-linux-gnu/ld-2.23.so
7fb45d462000-7fb45d463000 rw-p 00026000 ca:01 132976                     /lib/x86_64-linux-gnu/ld-2.23.so
7fb45d463000-7fb45d464000 rw-p 00000000 00:00 0
7fffc121d000-7fffc123f000 rw-p 00000000 00:00 0                          [stack]
7fffc12bb000-7fffc12bd000 r--p 00000000 00:00 0                          [vvar]
7fffc12bd000-7fffc12bf000 r-xp 00000000 00:00 0                          [vdso]
ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0                  [vsyscall]
*** Error in `/mnt2/dev/emsdk_portable/clang/fastcomp/build_incoming_64/bin/llc': munmap_chunk(): invalid pointer: 0x0000000005bab488 ***
======= Backtrace: =========
/lib/x86_64-linux-gnu/libc.so.6(+0x77725)[0x7f45c82a3725]
/lib/x86_64-linux-gnu/libc.so.6(cfree+0x1a8)[0x7f45c82afc18]
/mnt2/dev/emsdk_portable/clang/fastcomp/build_incoming_64/bin/llc(_ZN4llvm15LLVMContextImplD2Ev+0x2b6f)[0xb9746f]
/mnt2/dev/emsdk_portable/clang/fastcomp/build_incoming_64/bin/llc(_ZN4llvm11LLVMContextD1Ev+0x14)[0xb8e264]
/mnt2/dev/emsdk_portable/clang/fastcomp/build_incoming_64/bin/llc(main+0x157)[0x564d67]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf0)[0x7f45c824c830]
/mnt2/dev/emsdk_portable/clang/fastcomp/build_incoming_64/bin/llc(_start+0x29)[0x584ec9]
======= Memory map: ========
00400000-0146b000 r-xp 00000000 ca:50 4075774                            /mnt2/dev/emsdk_portable/clang/fastcomp/build_incoming_64/bin/llc
0166b000-0177e000 r--p 0106b000 ca:50 4075774                            /mnt2/dev/emsdk_portable/clang/fastcomp/build_incoming_64/bin/llc
0177e000-01780000 rw-p 0117e000 ca:50 4075774                            /mnt2/dev/emsdk_portable/clang/fastcomp/build_incoming_64/bin/llc
01780000-0179a000 rw-p 00000000 00:00 0
02aa8000-06e66000 rw-p 00000000 00:00 0                                  [heap]
7f45c6d87000-7f45c7589000 rw-p 00000000 00:00 0
7f45c7feb000-7f45c822c000 rw-p 00000000 00:00 0
7f45c822c000-7f45c83ec000 r-xp 00000000 ca:01 132988                     /lib/x86_64-linux-gnu/libc-2.23.so
7f45c83ec000-7f45c85eb000 ---p 001c0000 ca:01 132988                     /lib/x86_64-linux-gnu/libc-2.23.so
7f45c85eb000-7f45c85ef000 r--p 001bf000 ca:01 132988                     /lib/x86_64-linux-gnu/libc-2.23.so
7f45c85ef000-7f45c85f1000 rw-p 001c3000 ca:01 132988                     /lib/x86_64-linux-gnu/libc-2.23.so
7f45c85f1000-7f45c85f5000 rw-p 00000000 00:00 0
7f45c85f5000-7f45c860b000 r-xp 00000000 ca:01 133006                     /lib/x86_64-linux-gnu/libgcc_s.so.1
7f45c860b000-7f45c880a000 ---p 00016000 ca:01 133006                     /lib/x86_64-linux-gnu/libgcc_s.so.1
7f45c880a000-7f45c880b000 rw-p 00015000 ca:01 133006                     /lib/x86_64-linux-gnu/libgcc_s.so.1
7f45c880b000-7f45c8913000 r-xp 00000000 ca:01 133023                     /lib/x86_64-linux-gnu/libm-2.23.so
7f45c8913000-7f45c8b12000 ---p 00108000 ca:01 133023                     /lib/x86_64-linux-gnu/libm-2.23.so
7f45c8b12000-7f45c8b13000 r--p 00107000 ca:01 133023                     /lib/x86_64-linux-gnu/libm-2.23.so
7f45c8b13000-7f45c8b14000 rw-p 00108000 ca:01 133023                     /lib/x86_64-linux-gnu/libm-2.23.so
7f45c8b14000-7f45c8c86000 r-xp 00000000 ca:01 7972                       /usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.21
7f45c8c86000-7f45c8e86000 ---p 00172000 ca:01 7972                       /usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.21
7f45c8e86000-7f45c8e90000 r--p 00172000 ca:01 7972                       /usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.21
7f45c8e90000-7f45c8e92000 rw-p 0017c000 ca:01 7972                       /usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.21
7f45c8e92000-7f45c8e96000 rw-p 00000000 00:00 0
7f45c8e96000-7f45c8eaf000 r-xp 00000000 ca:01 133077                     /lib/x86_64-linux-gnu/libz.so.1.2.8
7f45c8eaf000-7f45c90ae000 ---p 00019000 ca:01 133077                     /lib/x86_64-linux-gnu/libz.so.1.2.8
7f45c90ae000-7f45c90af000 r--p 00018000 ca:01 133077                     /lib/x86_64-linux-gnu/libz.so.1.2.8
7f45c90af000-7f45c90b0000 rw-p 00019000 ca:01 133077                     /lib/x86_64-linux-gnu/libz.so.1.2.8
7f45c90b0000-7f45c90b3000 r-xp 00000000 ca:01 132999                     /lib/x86_64-linux-gnu/libdl-2.23.so
7f45c90b3000-7f45c92b2000 ---p 00003000 ca:01 132999                     /lib/x86_64-linux-gnu/libdl-2.23.so
7f45c92b2000-7f45c92b3000 r--p 00002000 ca:01 132999                     /lib/x86_64-linux-gnu/libdl-2.23.so
7f45c92b3000-7f45c92b4000 rw-p 00003000 ca:01 132999                     /lib/x86_64-linux-gnu/libdl-2.23.so
7f45c92b4000-7f45c92cc000 r-xp 00000000 ca:01 133054                     /lib/x86_64-linux-gnu/libpthread-2.23.so
7f45c92cc000-7f45c94cb000 ---p 00018000 ca:01 133054                     /lib/x86_64-linux-gnu/libpthread-2.23.so
7f45c94cb000-7f45c94cc000 r--p 00017000 ca:01 133054                     /lib/x86_64-linux-gnu/libpthread-2.23.so
7f45c94cc000-7f45c94cd000 rw-p 00018000 ca:01 133054                     /lib/x86_64-linux-gnu/libpthread-2.23.so
7f45c94cd000-7f45c94d1000 rw-p 00000000 00:00 0
7f45c94d1000-7f45c94f7000 r-xp 00000000 ca:01 132976                     /lib/x86_64-linux-gnu/ld-2.23.so
7f45c96dd000-7f45c96e4000 rw-p 00000000 00:00 0
7f45c96f3000-7f45c96f6000 rw-p 00000000 00:00 0
7f45c96f6000-7f45c96f7000 r--p 00025000 ca:01 132976                     /lib/x86_64-linux-gnu/ld-2.23.so
7f45c96f7000-7f45c96f8000 rw-p 00026000 ca:01 132976                     /lib/x86_64-linux-gnu/ld-2.23.so
7f45c96f8000-7f45c96f9000 rw-p 00000000 00:00 0
7ffecc7e6000-7ffecc808000 rw-p 00000000 00:00 0                          [stack]
7ffecc992000-7ffecc994000 r--p 00000000 00:00 0                          [vvar]
7ffecc994000-7ffecc996000 r-xp 00000000 00:00 0                          [vdso]
ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0                  [vsyscall]

Versions:

rustc 1.15.0-dev (295148862 2016-11-21)
emcc (Emscripten gcc/clang-like replacement) 1.36.14 (commit 834d78e085cd8d3848f534be9c937baa9460e3e5)

[ghost]

#39461 might be related.

[alexcrichton]

Looks like this has since been fixed! Doesn't crash on today's stable.