Mock Version: 3.0 Mock Version: 3.0 Mock Version: 3.0 ENTER ['do_with_status'](['bash', '--login', '-c', '/usr/bin/rpmbuild -bs --target riscv64 --nodeps /builddir/build/SPECS/golang-tinygo-x-llvm.spec'], chrootPath='/var/lib/mock/f37-build-side-32-misc-devel-223538-13722/root'env={'TERM': 'vt100', 'SHELL': '/bin/bash', 'HOME': '/builddir', 'HOSTNAME': 'mock', 'PATH': '/usr/bin:/bin:/usr/sbin:/sbin', 'PROMPT_COMMAND': 'printf "\\033]0;\\007"', 'PS1': ' \\s-\\v\\$ ', 'LANG': 'C.UTF-8'}shell=Falselogger=timeout=864000uid=996gid=135user='mockbuild'nspawn_args=[]unshare_net=TrueprintOutput=False) Executing command: ['bash', '--login', '-c', '/usr/bin/rpmbuild -bs --target riscv64 --nodeps /builddir/build/SPECS/golang-tinygo-x-llvm.spec'] with env {'TERM': 'vt100', 'SHELL': '/bin/bash', 'HOME': '/builddir', 'HOSTNAME': 'mock', 'PATH': '/usr/bin:/bin:/usr/sbin:/sbin', 'PROMPT_COMMAND': 'printf "\\033]0;\\007"', 'PS1': ' \\s-\\v\\$ ', 'LANG': 'C.UTF-8'} and shell False Building target platforms: riscv64 Building for target riscv64 setting SOURCE_DATE_EPOCH=1675209600 Wrote: /builddir/build/SRPMS/golang-tinygo-x-llvm-0-0.1.20221002gitdcb078a.fc37.src.rpm Child return code was: 0 ENTER ['do_with_status'](['bash', '--login', '-c', '/usr/bin/rpmbuild -bb --target riscv64 --nodeps /builddir/build/SPECS/golang-tinygo-x-llvm.spec'], chrootPath='/var/lib/mock/f37-build-side-32-misc-devel-223538-13722/root'env={'TERM': 'vt100', 'SHELL': '/bin/bash', 'HOME': '/builddir', 'HOSTNAME': 'mock', 'PATH': '/usr/bin:/bin:/usr/sbin:/sbin', 'PROMPT_COMMAND': 'printf "\\033]0;\\007"', 'PS1': ' \\s-\\v\\$ ', 'LANG': 'C.UTF-8'}shell=Falselogger=timeout=864000uid=996gid=135user='mockbuild'nspawn_args=[]unshare_net=TrueprintOutput=False) Executing command: ['bash', '--login', '-c', '/usr/bin/rpmbuild -bb --target riscv64 --nodeps /builddir/build/SPECS/golang-tinygo-x-llvm.spec'] with env {'TERM': 'vt100', 'SHELL': '/bin/bash', 'HOME': '/builddir', 'HOSTNAME': 'mock', 'PATH': '/usr/bin:/bin:/usr/sbin:/sbin', 'PROMPT_COMMAND': 'printf "\\033]0;\\007"', 'PS1': ' \\s-\\v\\$ ', 'LANG': 'C.UTF-8'} and shell False Building target platforms: riscv64 Building for target riscv64 setting SOURCE_DATE_EPOCH=1675209600 Executing(%prep): /bin/sh -e /var/tmp/rpm-tmp.PM6Whr + umask 022 + cd /builddir/build/BUILD + cd /builddir/build/BUILD + rm -rf go-llvm-dcb078a262665943160fa7b6a8dd219c2e2fc990 + /usr/lib/rpm/rpmuncompress -x /builddir/build/SOURCES/go-llvm-dcb078a262665943160fa7b6a8dd219c2e2fc990.tar.gz + STATUS=0 + '[' 0 -ne 0 ']' + cd go-llvm-dcb078a262665943160fa7b6a8dd219c2e2fc990 + /usr/bin/chmod -Rf a+rX,u+w,g-w,o-w . + rm -fr /builddir/build/BUILD/go-llvm-dcb078a262665943160fa7b6a8dd219c2e2fc990/vendor + [[ ! -e /builddir/build/BUILD/go-llvm-dcb078a262665943160fa7b6a8dd219c2e2fc990/_build/bin ]] + install -m 0755 -vd /builddir/build/BUILD/go-llvm-dcb078a262665943160fa7b6a8dd219c2e2fc990/_build/bin install: creating directory '/builddir/build/BUILD/go-llvm-dcb078a262665943160fa7b6a8dd219c2e2fc990/_build' install: creating directory '/builddir/build/BUILD/go-llvm-dcb078a262665943160fa7b6a8dd219c2e2fc990/_build/bin' + export GOPATH=/builddir/build/BUILD/go-llvm-dcb078a262665943160fa7b6a8dd219c2e2fc990/_build:/usr/share/gocode + GOPATH=/builddir/build/BUILD/go-llvm-dcb078a262665943160fa7b6a8dd219c2e2fc990/_build:/usr/share/gocode + [[ ! -e /builddir/build/BUILD/go-llvm-dcb078a262665943160fa7b6a8dd219c2e2fc990/_build/src/tinygo.org/x/go-llvm ]] ++ dirname /builddir/build/BUILD/go-llvm-dcb078a262665943160fa7b6a8dd219c2e2fc990/_build/src/tinygo.org/x/go-llvm + install -m 0755 -vd /builddir/build/BUILD/go-llvm-dcb078a262665943160fa7b6a8dd219c2e2fc990/_build/src/tinygo.org/x install: creating directory '/builddir/build/BUILD/go-llvm-dcb078a262665943160fa7b6a8dd219c2e2fc990/_build/src' install: creating directory '/builddir/build/BUILD/go-llvm-dcb078a262665943160fa7b6a8dd219c2e2fc990/_build/src/tinygo.org' install: creating directory '/builddir/build/BUILD/go-llvm-dcb078a262665943160fa7b6a8dd219c2e2fc990/_build/src/tinygo.org/x' + ln -fs /builddir/build/BUILD/go-llvm-dcb078a262665943160fa7b6a8dd219c2e2fc990 /builddir/build/BUILD/go-llvm-dcb078a262665943160fa7b6a8dd219c2e2fc990/_build/src/tinygo.org/x/go-llvm + cd /builddir/build/BUILD/go-llvm-dcb078a262665943160fa7b6a8dd219c2e2fc990/_build/src/tinygo.org/x/go-llvm + /usr/lib/rpm/rpmuncompress /builddir/build/SOURCES/0001-Make-LLVM-config-file-architecture-independent.patch + /usr/bin/patch -p1 -s --fuzz=0 --no-backup-if-mismatch -f + rm llvm_config_darwin_llvm14.go llvm_config_darwin_llvm15.go llvm_config_linux_llvm14.go llvm_config_linux_llvm15.go + for version in 14 15 + type llvm-config-14-64 llvm-config-14 is /usr/bin/llvm-config-14 /var/tmp/rpm-tmp.PM6Whr: line 64: type: llvm-config-14-64: not found + type llvm-config-14 + make config VERSION=14.0.0 CONFIG=llvm-config-14 BUILDDIR=/usr + mv llvm_config_linux.go llvm_config_linux_llvm14.go + for version in 14 15 + type llvm-config-15-64 llvm-config-15-64 is /usr/bin/llvm-config-15-64 + make config VERSION=15.0.0 CONFIG=llvm-config-15-64 BUILDDIR=/usr + mv llvm_config_linux.go llvm_config_linux_llvm15.go + RPM_EC=0 ++ jobs -p + exit 0 Executing(%install): /bin/sh -e /var/tmp/rpm-tmp.8TVjjJ + umask 022 + cd /builddir/build/BUILD + '[' /builddir/build/BUILDROOT/golang-tinygo-x-llvm-0-0.1.20221002gitdcb078a.fc37.riscv64 '!=' / ']' + rm -rf /builddir/build/BUILDROOT/golang-tinygo-x-llvm-0-0.1.20221002gitdcb078a.fc37.riscv64 ++ dirname /builddir/build/BUILDROOT/golang-tinygo-x-llvm-0-0.1.20221002gitdcb078a.fc37.riscv64 + mkdir -p /builddir/build/BUILDROOT + mkdir /builddir/build/BUILDROOT/golang-tinygo-x-llvm-0-0.1.20221002gitdcb078a.fc37.riscv64 + cd go-llvm-dcb078a262665943160fa7b6a8dd219c2e2fc990 + cd /builddir/build/BUILD/go-llvm-dcb078a262665943160fa7b6a8dd219c2e2fc990/_build/src/tinygo.org/x/go-llvm + IFS= + gosupfiles= + mapfile -t gosupfilesA + go-rpm-integration install -i tinygo.org/x/go-llvm -b /builddir/build/BUILD/go-llvm-dcb078a262665943160fa7b6a8dd219c2e2fc990/_build/bin -s /builddir/build/BUILD/go-llvm-dcb078a262665943160fa7b6a8dd219c2e2fc990/_build -o golang-tinygo-x-llvm-devel.file-list -O /builddir/build/BUILD/go-llvm-dcb078a262665943160fa7b6a8dd219c2e2fc990 -V 0-0.1.20221002gitdcb078a.fc37 -C dcb078a262665943160fa7b6a8dd219c2e2fc990 -p /builddir/build/BUILDROOT/golang-tinygo-x-llvm-0-0.1.20221002gitdcb078a.fc37.riscv64 -g /usr/share/gocode -r '.*example.*' Installing: tinygo.org/x/go-llvm + IFS= +++ sort -u +++ realpath -e --relative-base=. README.markdown ++ listfiles_include=README.markdown ++ echo README.markdown + godocs=README.markdown + [[ -n README.markdown ]] + IFS= + read -r f + echo %doc '"README.markdown"' + IFS= + read -r f + IFS= +++ realpath -e --relative-base=. LICENSE.txt +++ sort -u ++ listfiles_include=LICENSE.txt ++ echo LICENSE.txt + golicenses=LICENSE.txt + [[ -n LICENSE.txt ]] + IFS= + read -r f + echo %license '"LICENSE.txt"' + IFS= + read -r f + /usr/lib/rpm/check-buildroot + /usr/lib/rpm/redhat/brp-ldconfig + /usr/lib/rpm/brp-compress + /usr/lib/rpm/brp-strip /usr/bin/strip + /usr/lib/rpm/brp-strip-comment-note /usr/bin/strip /usr/bin/objdump + /usr/lib/rpm/redhat/brp-strip-lto /usr/bin/strip + /usr/lib/rpm/brp-strip-static-archive /usr/bin/strip + /usr/lib/rpm/check-rpaths + /usr/lib/rpm/redhat/brp-mangle-shebangs + /usr/lib/rpm/brp-remove-la-files + /usr/lib/rpm/redhat/brp-python-bytecompile '' 1 0 + /usr/lib/rpm/redhat/brp-python-hardlink Executing(%check): /bin/sh -e /var/tmp/rpm-tmp.nWCKTj + umask 022 + cd /builddir/build/BUILD + cd go-llvm-dcb078a262665943160fa7b6a8dd219c2e2fc990 + for version in 14 15 + export TAGS=llvm14 + TAGS=llvm14 + LDFLAGS=' -X tinygo.org/x/go-llvm/version=0 -X tinygo.org/x/go-llvm/version.commit=dcb078a262665943160fa7b6a8dd219c2e2fc990' + GO_TEST_FLAGS='-buildmode pie -compiler gc -tags=llvm14' + GO_TEST_EXT_LD_FLAGS='-Wl,-z,relro -Wl,--as-needed -Wl,-z,now -specs=/usr/lib/rpm/redhat/redhat-hardened-ld -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 -Wl,--build-id=sha1 -specs=/usr/lib/rpm/redhat/redhat-package-notes ' + go-rpm-integration check -i tinygo.org/x/go-llvm -b /builddir/build/BUILD/go-llvm-dcb078a262665943160fa7b6a8dd219c2e2fc990/_build/bin -s /builddir/build/BUILD/go-llvm-dcb078a262665943160fa7b6a8dd219c2e2fc990/_build -V 0-0.1.20221002gitdcb078a.fc37 -C dcb078a262665943160fa7b6a8dd219c2e2fc990 -p /builddir/build/BUILDROOT/golang-tinygo-x-llvm-0-0.1.20221002gitdcb078a.fc37.riscv64 -g /usr/share/gocode -r '.*example.*' Testing in: /builddir/build/BUILD/go-llvm-dcb078a262665943160fa7b6a8dd219c2e2fc990/_build/src PATH: /builddir/build/BUILD/go-llvm-dcb078a262665943160fa7b6a8dd219c2e2fc990/_build/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/sbin GOPATH: /builddir/build/BUILD/go-llvm-dcb078a262665943160fa7b6a8dd219c2e2fc990/_build:/usr/share/gocode GO111MODULE: off command: go test -buildmode pie -compiler gc -tags=llvm14 -ldflags " -X tinygo.org/x/go-llvm/version=0 -X tinygo.org/x/go-llvm/version.commit=dcb078a262665943160fa7b6a8dd219c2e2fc990 -extldflags '-Wl,-z,relro -Wl,--as-needed -Wl,-z,now -specs=/usr/lib/rpm/redhat/redhat-hardened-ld -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 -Wl,--build-id=sha1 -specs=/usr/lib/rpm/redhat/redhat-package-notes '" testing: tinygo.org/x/go-llvm tinygo.org/x/go-llvm WARNING: This target JIT is not designed for the host you are running. If bad things happen, please choose a different -march switch. LLVM ERROR: Relocation type not implemented yet! SIGABRT: abort PC=0x3fbe2a0e7e m=0 sigcode=4294967290 signal arrived during cgo execution goroutine 35 [syscall]: runtime.cgocall(0x2ad98f2240, 0x3f9405bd78) /usr/lib/golang/src/runtime/cgocall.go:158 +0x54 fp=0x3f9405bd40 sp=0x3f9405bd10 pc=0x2ad97fbefc tinygo.org/x/go-llvm._Cfunc_LLVMRunFunction(0x2adbc14920, 0x2adbc02e68, 0x1, 0x3f9411c288) _cgo_gotypes.go:8491 +0x3c fp=0x3f9405bd70 sp=0x3f9405bd40 pc=0x2ad98e55fc tinygo.org/x/go-llvm.ExecutionEngine.RunFunction.func1({0x2ad98e1d34?}, {0x8?}, 0x1, 0x3f9405bd01?) /builddir/build/BUILD/go-llvm-dcb078a262665943160fa7b6a8dd219c2e2fc990/_build/src/tinygo.org/x/go-llvm/executionengine.go:141 +0xd8 fp=0x3f9405bdc8 sp=0x3f9405bd70 pc=0x2ad98e7400 tinygo.org/x/go-llvm.ExecutionEngine.RunFunction({0x2adbc0e000?}, {0x100000002?}, {0x3f9411c288?, 0x0?, 0x3f9411c210?}) /builddir/build/BUILD/go-llvm-dcb078a262665943160fa7b6a8dd219c2e2fc990/_build/src/tinygo.org/x/go-llvm/executionengine.go:141 +0x60 fp=0x3f9405bdf0 sp=0x3f9405bdc8 pc=0x2ad98e7308 tinygo.org/x/go-llvm.TestFactorial(0x3f9410e680) /builddir/build/BUILD/go-llvm-dcb078a262665943160fa7b6a8dd219c2e2fc990/_build/src/tinygo.org/x/go-llvm/executionengine_test.go:91 +0x544 fp=0x3f9405bf78 sp=0x3f9405bdf0 pc=0x2ad98e1d54 testing.tRunner(0x3f9410e680, 0x2ad99780d0) /usr/lib/golang/src/testing/testing.go:1446 +0x11c fp=0x3f9405bfc0 sp=0x3f9405bf78 pc=0x2ad98a8d3c testing.(*T).Run.func1() /usr/lib/golang/src/testing/testing.go:1493 +0x30 fp=0x3f9405bfd8 sp=0x3f9405bfc0 pc=0x2ad98a9970 runtime.goexit() /usr/lib/golang/src/runtime/asm_riscv64.s:516 +0x4 fp=0x3f9405bfd8 sp=0x3f9405bfd8 pc=0x2ad985cdd4 created by testing.(*T).Run /usr/lib/golang/src/testing/testing.go:1493 +0x338 goroutine 1 [chan receive]: runtime.gopark(0x2ad9804b30?, 0x2ad9a76140?, 0x70?, 0x4d?, 0x3f9410e680?) /usr/lib/golang/src/runtime/proc.go:363 +0x110 fp=0x3f9405aa58 sp=0x3f9405aa40 pc=0x2ad98312c0 runtime.chanrecv(0x3f94148070, 0x3f9405ab57, 0xe8?) /usr/lib/golang/src/runtime/chan.go:583 +0x498 fp=0x3f9405aae8 sp=0x3f9405aa58 pc=0x2ad97fef70 runtime.chanrecv1(0x3f94106420?, 0x1?) /usr/lib/golang/src/runtime/chan.go:442 +0x14 fp=0x3f9405ab08 sp=0x3f9405aae8 pc=0x2ad97feabc testing.(*T).Run(0x3f9410e4e0, {0x2ad99130d6?, 0x2ad986ba80?}, 0x2ad99780d0) /usr/lib/golang/src/testing/testing.go:1494 +0x34c fp=0x3f9405aba0 sp=0x3f9405ab08 pc=0x2ad98a98fc testing.runTests.func1(0x1a0?) /usr/lib/golang/src/testing/testing.go:1846 +0x78 fp=0x3f9405abe8 sp=0x3f9405aba0 pc=0x2ad98ab3e8 testing.tRunner(0x3f9410e4e0, 0x3f9405acf0) /usr/lib/golang/src/testing/testing.go:1446 +0x11c fp=0x3f9405ac30 sp=0x3f9405abe8 pc=0x2ad98a8d3c testing.runTests(0x3f941240a0?, {0x2ad9a2d4a0, 0x6, 0x6}, {0x5?, 0x40000000000cc8?, 0x2ad9a48ac0?}) /usr/lib/golang/src/testing/testing.go:1844 +0x408 fp=0x3f9405ad10 sp=0x3f9405ac30 pc=0x2ad98ab2d0 testing.(*M).Run(0x3f941240a0) /usr/lib/golang/src/testing/testing.go:1726 +0x504 fp=0x3f9405af00 sp=0x3f9405ad10 pc=0x2ad98aa0ac main.main() _testmain.go:59 +0x1a8 fp=0x3f9405af80 sp=0x3f9405af00 pc=0x2ad98eb7d8 runtime.main() /usr/lib/golang/src/runtime/proc.go:250 +0x218 fp=0x3f9405afd8 sp=0x3f9405af80 pc=0x2ad9830ed0 runtime.goexit() /usr/lib/golang/src/runtime/asm_riscv64.s:516 +0x4 fp=0x3f9405afd8 sp=0x3f9405afd8 pc=0x2ad985cdd4 goroutine 2 [force gc (idle)]: runtime.gopark(0x0?, 0x0?, 0x0?, 0x0?, 0x0?) /usr/lib/golang/src/runtime/proc.go:363 +0x110 fp=0x3f9404cfb0 sp=0x3f9404cf98 pc=0x2ad98312c0 runtime.goparkunlock(...) /usr/lib/golang/src/runtime/proc.go:369 runtime.forcegchelper() /usr/lib/golang/src/runtime/proc.go:302 +0xb0 fp=0x3f9404cfd8 sp=0x3f9404cfb0 pc=0x2ad9831148 runtime.goexit() /usr/lib/golang/src/runtime/asm_riscv64.s:516 +0x4 fp=0x3f9404cfd8 sp=0x3f9404cfd8 pc=0x2ad985cdd4 created by runtime.init.5 /usr/lib/golang/src/runtime/proc.go:290 +0x28 goroutine 18 [GC sweep wait]: runtime.gopark(0x0?, 0x0?, 0x0?, 0x0?, 0x0?) /usr/lib/golang/src/runtime/proc.go:363 +0x110 fp=0x3f94048798 sp=0x3f94048780 pc=0x2ad98312c0 runtime.goparkunlock(...) /usr/lib/golang/src/runtime/proc.go:369 runtime.bgsweep(0x0?) /usr/lib/golang/src/runtime/mgcsweep.go:278 +0xa8 fp=0x3f940487c8 sp=0x3f94048798 pc=0x2ad981bf38 runtime.gcenable.func1() /usr/lib/golang/src/runtime/mgc.go:178 +0x2c fp=0x3f940487d8 sp=0x3f940487c8 pc=0x2ad9810764 runtime.goexit() /usr/lib/golang/src/runtime/asm_riscv64.s:516 +0x4 fp=0x3f940487d8 sp=0x3f940487d8 pc=0x2ad985cdd4 created by runtime.gcenable /usr/lib/golang/src/runtime/mgc.go:178 +0x70 goroutine 19 [GC scavenge wait]: runtime.gopark(0x3f9408e000?, 0x2ad9940828?, 0x0?, 0x0?, 0x0?) /usr/lib/golang/src/runtime/proc.go:363 +0x110 fp=0x3f94048f80 sp=0x3f94048f68 pc=0x2ad98312c0 runtime.goparkunlock(...) /usr/lib/golang/src/runtime/proc.go:369 runtime.(*scavengerState).park(0x2ad9a48b40) /usr/lib/golang/src/runtime/mgcscavenge.go:389 +0x68 fp=0x3f94048fa8 sp=0x3f94048f80 pc=0x2ad9819ed0 runtime.bgscavenge(0x0?) /usr/lib/golang/src/runtime/mgcscavenge.go:617 +0x50 fp=0x3f94048fc8 sp=0x3f94048fa8 pc=0x2ad981a420 runtime.gcenable.func2() /usr/lib/golang/src/runtime/mgc.go:179 +0x2c fp=0x3f94048fd8 sp=0x3f94048fc8 pc=0x2ad9810704 runtime.goexit() /usr/lib/golang/src/runtime/asm_riscv64.s:516 +0x4 fp=0x3f94048fd8 sp=0x3f94048fd8 pc=0x2ad985cdd4 created by runtime.gcenable /usr/lib/golang/src/runtime/mgc.go:179 +0xb0 goroutine 34 [finalizer wait]: runtime.gopark(0xfe5?, 0x7f28?, 0xe5?, 0xf?, 0xfe5?) /usr/lib/golang/src/runtime/proc.go:363 +0x110 fp=0x3f9404c5a8 sp=0x3f9404c590 pc=0x2ad98312c0 runtime.goparkunlock(...) /usr/lib/golang/src/runtime/proc.go:369 runtime.runfinq() /usr/lib/golang/src/runtime/mfinal.go:180 +0x110 fp=0x3f9404c7d8 sp=0x3f9404c5a8 pc=0x2ad980f958 runtime.goexit() /usr/lib/golang/src/runtime/asm_riscv64.s:516 +0x4 fp=0x3f9404c7d8 sp=0x3f9404c7d8 pc=0x2ad985cdd4 created by runtime.createfing /usr/lib/golang/src/runtime/mfinal.go:157 +0x64 ra 0x3fbe2a0e70 sp 0x3fffb27988 gp 0x2ad9a484e8 tp 0x3fbe134240 t0 0x0 t1 0x3fbf0172dc t2 0xb s0 0x8a1d s1 0x3fbe378d58 a0 0x0 a1 0x8a1d a2 0x6 a3 0x3fbe3791b0 a4 0x1 a5 0x3fbe133ae0 a6 0xfefefefefefefeff a7 0x83 s2 0x3fbe133ae0 s3 0x6 s4 0x3fc40d0d10 s5 0x6 s6 0x2adbc2cc00 s7 0x0 s8 0x2adbc9a818 s9 0x0 s10 0xfffffffffffffff8 s11 0x2adbc2cc00 t3 0x3fbe25b128 t4 0x3fffb27b30 t5 0x2adbc87be8 t6 0xcccccccccccccccd pc 0x3fbe2a0e7e exit status 2 FAIL tinygo.org/x/go-llvm 2.666s error: Bad exit status from /var/tmp/rpm-tmp.nWCKTj (%check) RPM build errors: Bad exit status from /var/tmp/rpm-tmp.nWCKTj (%check) Child return code was: 1 EXCEPTION: [Error()] Traceback (most recent call last): File "/usr/lib/python3.10/site-packages/mockbuild/trace_decorator.py", line 93, in trace result = func(*args, **kw) File "/usr/lib/python3.10/site-packages/mockbuild/util.py", line 598, in do_with_status raise exception.Error("Command failed: \n # %s\n%s" % (command, output), child.returncode) mockbuild.exception.Error: Command failed: # bash --login -c /usr/bin/rpmbuild -bb --target riscv64 --nodeps /builddir/build/SPECS/golang-tinygo-x-llvm.spec