[INFO] cloning repository https://github.com/caelum100/luminite [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/caelum100/luminite" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcaelum100%2Fluminite", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcaelum100%2Fluminite'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] b55d18cb57cb0bf74a445e46a90af632c4975ed6 [INFO] documenting caelum100/luminite against 1.46.0 for beta-1.47-rustdoc-1 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcaelum100%2Fluminite" "/workspace/builds/worker-6/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/caelum100/luminite on toolchain 1.46.0 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/caelum100/luminite [INFO] finished tweaking git repo https://github.com/caelum100/luminite [INFO] tweaked toml for git repo https://github.com/caelum100/luminite written to /workspace/builds/worker-6/source/Cargo.toml [INFO] crate git repo https://github.com/caelum100/luminite already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.46.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] [stdout] 41273b32d47e60f1212b4b82ee33d9cce3e231a2dd39557ec8a99760aa99c1dc [INFO] running `Command { std: "docker" "start" "-a" "41273b32d47e60f1212b4b82ee33d9cce3e231a2dd39557ec8a99760aa99c1dc", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "41273b32d47e60f1212b4b82ee33d9cce3e231a2dd39557ec8a99760aa99c1dc", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "41273b32d47e60f1212b4b82ee33d9cce3e231a2dd39557ec8a99760aa99c1dc", kill_on_drop: false }` [INFO] [stdout] 41273b32d47e60f1212b4b82ee33d9cce3e231a2dd39557ec8a99760aa99c1dc [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.46.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 01716901799cc8e032fde1c409ee1a74af1436c43bad1eab792fb1e7201f015e [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "01716901799cc8e032fde1c409ee1a74af1436c43bad1eab792fb1e7201f015e", kill_on_drop: false }` [INFO] [stderr] Compiling cc v1.0.23 [INFO] [stderr] Compiling arrayref v0.3.5 [INFO] [stderr] Compiling byte-tools v0.2.0 [INFO] [stderr] Checking rand_core v0.2.1 [INFO] [stderr] Checking downcast-rs v1.0.3 [INFO] [stderr] Compiling num-bigint v0.2.0 [INFO] [stderr] Compiling nix v0.11.0 [INFO] [stderr] Compiling num-rational v0.2.1 [INFO] [stderr] Compiling num-complex v0.2.0 [INFO] [stderr] Checking tobj v0.1.6 [INFO] [stderr] Checking memchr v0.1.11 [INFO] [stderr] Checking memmap v0.6.2 [INFO] [stderr] Checking log v0.4.4 [INFO] [stderr] Compiling x11-dl v2.18.3 [INFO] [stderr] Compiling wayland-scanner v0.20.12 [INFO] [stderr] Compiling typenum v1.10.0 [INFO] [stderr] Checking smallvec v0.6.5 [INFO] [stderr] Checking lock_api v0.1.3 [INFO] [stderr] Checking aho-corasick v0.5.3 [INFO] [stderr] Compiling block-buffer v0.3.3 [INFO] [stderr] Checking log v0.3.9 [INFO] [stderr] Checking simple_logger v0.5.0 [INFO] [stderr] Checking thread-id v2.0.0 [INFO] [stderr] Compiling rand v0.5.5 [INFO] [stderr] Checking num-bigint v0.1.44 [INFO] [stderr] Checking thread_local v0.2.7 [INFO] [stderr] Checking regex v0.1.80 [INFO] [stderr] Compiling cmake v0.1.33 [INFO] [stderr] Compiling generic-array v0.9.0 [INFO] [stderr] Compiling wayland-client v0.20.12 [INFO] [stderr] Compiling wayland-protocols v0.20.12 [INFO] [stderr] Compiling tempfile v3.0.3 [INFO] [stderr] Compiling digest v0.7.5 [INFO] [stderr] Compiling libloading v0.5.0 [INFO] [stderr] Compiling sha2 v0.7.1 [INFO] [stderr] Checking num-rational v0.1.42 [INFO] [stderr] Checking parking_lot_core v0.3.0 [INFO] [stderr] Checking env_logger v0.3.5 [INFO] [stderr] Compiling glsl-to-spirv v0.1.6 [INFO] [stderr] Checking num v0.1.42 [INFO] [stderr] Checking quickcheck v0.2.27 [INFO] [stderr] Checking dlib v0.4.1 [INFO] [stderr] Checking parking_lot v0.6.4 [INFO] [stderr] Checking wayland-sys v0.20.12 [INFO] [stderr] Checking wayland-commons v0.20.12 [INFO] [stderr] Checking num v0.2.0 [INFO] [stderr] Checking glm v0.2.3 [INFO] [stderr] Checking smithay-client-toolkit v0.3.0 [INFO] [stderr] Checking winit v0.17.2 [INFO] [stderr] error: failed to run custom build command for `glsl-to-spirv v0.1.6` [INFO] [stderr] [INFO] [stderr] Caused by: [INFO] [stderr] process didn't exit successfully: `/opt/rustwide/target/debug/build/glsl-to-spirv-04353e1cfab0a770/build-script-build` (exit code: 101) [INFO] [stderr] --- stdout [INFO] [stderr] cargo:rerun-if-changed=build/glslangValidator.exe [INFO] [stderr] running: "cmake" "/opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/glsl-to-spirv-0.1.6/glslang" "-DCMAKE_INSTALL_PREFIX=/opt/rustwide/target/debug/build/glsl-to-spirv-72f57968f498f396/out" "-DCMAKE_C_FLAGS= -ffunction-sections -fdata-sections -fPIC -m64" "-DCMAKE_C_COMPILER=/usr/bin/cc" "-DCMAKE_CXX_FLAGS= -ffunction-sections -fdata-sections -fPIC -m64" "-DCMAKE_CXX_COMPILER=/usr/bin/c++" "-DCMAKE_BUILD_TYPE=Debug" [INFO] [stderr] -- The C compiler identification is GNU 9.3.0 [INFO] [stderr] -- The CXX compiler identification is GNU 9.3.0 [INFO] [stderr] -- Check for working C compiler: /usr/bin/cc [INFO] [stderr] -- Check for working C compiler: /usr/bin/cc -- works [INFO] [stderr] -- Detecting C compiler ABI info [INFO] [stderr] -- Detecting C compiler ABI info - done [INFO] [stderr] -- Detecting C compile features [INFO] [stderr] -- Detecting C compile features - done [INFO] [stderr] -- Check for working CXX compiler: /usr/bin/c++ [INFO] [stderr] -- Check for working CXX compiler: /usr/bin/c++ -- works [INFO] [stderr] -- Detecting CXX compiler ABI info [INFO] [stderr] -- Detecting CXX compiler ABI info - done [INFO] [stderr] -- Detecting CXX compile features [INFO] [stderr] -- Detecting CXX compile features - done [INFO] [stderr] -- Google Mock was not found - tests based on that will not build [INFO] [stderr] -- Configuring done [INFO] [stderr] -- Generating done [INFO] [stderr] -- Build files have been written to: /opt/rustwide/target/debug/build/glsl-to-spirv-72f57968f498f396/out/build [INFO] [stderr] running: "cmake" "--build" "." "--target" "install" "--config" "Debug" "--" [INFO] [stderr] Scanning dependencies of target OGLCompiler [INFO] [stderr] Scanning dependencies of target OSDependent [INFO] [stderr] Scanning dependencies of target glslang-default-resource-limits [INFO] [stderr] [ 1%] Building CXX object OGLCompilersDLL/CMakeFiles/OGLCompiler.dir/InitializeDll.cpp.o [INFO] [stderr] Scanning dependencies of target HLSL [INFO] [stderr] Scanning dependencies of target SPVRemapper [INFO] [stderr] [ 3%] Building CXX object hlsl/CMakeFiles/HLSL.dir/hlslScanContext.cpp.o [INFO] [stderr] [ 5%] Building CXX object hlsl/CMakeFiles/HLSL.dir/hlslParseHelper.cpp.o [INFO] [stderr] [ 7%] Building CXX object glslang/OSDependent/Unix/CMakeFiles/OSDependent.dir/ossource.cpp.o [INFO] [stderr] [ 8%] Building CXX object hlsl/CMakeFiles/HLSL.dir/hlslAttributes.cpp.o [INFO] [stderr] [ 10%] Building CXX object StandAlone/CMakeFiles/glslang-default-resource-limits.dir/ResourceLimits.cpp.o [INFO] [stderr] [ 12%] Building CXX object SPIRV/CMakeFiles/SPVRemapper.dir/SPVRemapper.cpp.o [INFO] [stderr] [ 14%] Building CXX object SPIRV/CMakeFiles/SPVRemapper.dir/doc.cpp.o [INFO] [stderr] [ 15%] Building CXX object hlsl/CMakeFiles/HLSL.dir/hlslTokenStream.cpp.o [INFO] [stderr] [ 17%] Building CXX object hlsl/CMakeFiles/HLSL.dir/hlslOpMap.cpp.o [INFO] [stderr] [ 19%] Linking CXX static library libOSDependent.a [INFO] [stderr] [ 19%] Built target OSDependent [INFO] [stderr] [ 21%] Building CXX object hlsl/CMakeFiles/HLSL.dir/hlslGrammar.cpp.o [INFO] [stderr] [ 22%] Building CXX object hlsl/CMakeFiles/HLSL.dir/hlslParseables.cpp.o [INFO] [stderr] [ 24%] Linking CXX static library libOGLCompiler.a [INFO] [stderr] [ 24%] Built target OGLCompiler [INFO] [stderr] [ 26%] Linking CXX static library libglslang-default-resource-limits.a [INFO] [stderr] [ 26%] Built target glslang-default-resource-limits [INFO] [stderr] [ 28%] Linking CXX static library libSPVRemapper.a [INFO] [stderr] [ 28%] Built target SPVRemapper [INFO] [stderr] [ 29%] Linking CXX static library libHLSL.a [INFO] [stderr] [ 29%] Built target HLSL [INFO] [stderr] Scanning dependencies of target glslang [INFO] [stderr] [ 31%] Building CXX object glslang/CMakeFiles/glslang.dir/MachineIndependent/glslang_tab.cpp.o [INFO] [stderr] [ 33%] Building CXX object glslang/CMakeFiles/glslang.dir/MachineIndependent/iomapper.cpp.o [INFO] [stderr] [ 36%] Building CXX object glslang/CMakeFiles/glslang.dir/MachineIndependent/InfoSink.cpp.o [INFO] [stderr] [ 36%] Building CXX object glslang/CMakeFiles/glslang.dir/MachineIndependent/Constant.cpp.o [INFO] [stderr] [ 38%] Building CXX object glslang/CMakeFiles/glslang.dir/MachineIndependent/Initialize.cpp.o [INFO] [stderr] [ 40%] Building CXX object glslang/CMakeFiles/glslang.dir/MachineIndependent/ParseContextBase.cpp.o [INFO] [stderr] [ 43%] Building CXX object glslang/CMakeFiles/glslang.dir/MachineIndependent/Intermediate.cpp.o [INFO] [stderr] [ 43%] Building CXX object glslang/CMakeFiles/glslang.dir/MachineIndependent/IntermTraverse.cpp.o [INFO] [stderr] [ 45%] Building CXX object glslang/CMakeFiles/glslang.dir/MachineIndependent/ParseHelper.cpp.o [INFO] [stderr] [ 47%] Building CXX object glslang/CMakeFiles/glslang.dir/MachineIndependent/RemoveTree.cpp.o [INFO] [stderr] [ 49%] Building CXX object glslang/CMakeFiles/glslang.dir/MachineIndependent/PoolAlloc.cpp.o [INFO] [stderr] [ 50%] Building CXX object glslang/CMakeFiles/glslang.dir/MachineIndependent/Scan.cpp.o [INFO] [stderr] [ 52%] Building CXX object glslang/CMakeFiles/glslang.dir/MachineIndependent/ShaderLang.cpp.o [INFO] [stderr] [ 54%] Building CXX object glslang/CMakeFiles/glslang.dir/MachineIndependent/SymbolTable.cpp.o [INFO] [stderr] [ 56%] Building CXX object glslang/CMakeFiles/glslang.dir/MachineIndependent/Versions.cpp.o [INFO] [stderr] [ 57%] Building CXX object glslang/CMakeFiles/glslang.dir/MachineIndependent/intermOut.cpp.o [INFO] [stderr] [ 59%] Building CXX object glslang/CMakeFiles/glslang.dir/MachineIndependent/limits.cpp.o [INFO] [stderr] [ 61%] Building CXX object glslang/CMakeFiles/glslang.dir/MachineIndependent/linkValidate.cpp.o [INFO] [stderr] [INFO] [stderr] --- stderr [INFO] [stderr] fatal: not a git repository (or any parent up to mount point /opt/rustwide) [INFO] [stderr] Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set). [INFO] [stderr] c++: fatal error: Killed signal terminated program cc1plus [INFO] [stderr] compilation terminated. [INFO] [stderr] make[2]: *** [glslang/CMakeFiles/glslang.dir/build.make:219: glslang/CMakeFiles/glslang.dir/MachineIndependent/ShaderLang.cpp.o] Error 1 [INFO] [stderr] make[2]: *** Waiting for unfinished jobs.... [INFO] [stderr] c++: fatal error: Killed signal terminated program cc1plus [INFO] [stderr] compilation terminated. [INFO] [stderr] make[2]: *** [glslang/CMakeFiles/glslang.dir/build.make:167: glslang/CMakeFiles/glslang.dir/MachineIndependent/ParseHelper.cpp.o] Error 1 [INFO] [stderr] make[1]: *** [CMakeFiles/Makefile2:1032: glslang/CMakeFiles/glslang.dir/all] Error 2 [INFO] [stderr] make: *** [Makefile:141: all] Error 2 [INFO] [stderr] thread 'main' panicked at ' [INFO] [stderr] command did not execute successfully, got: exit code: 2 [INFO] [stderr] [INFO] [stderr] build script failed, must exit now', /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/cmake-0.1.33/src/lib.rs:773:5 [INFO] [stderr] stack backtrace: [INFO] [stderr] 0: 0x55f76f60a865 - backtrace::backtrace::libunwind::trace::h14d338b30b3ea0a7 [INFO] [stderr] at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.46/src/backtrace/libunwind.rs:86 [INFO] [stderr] 1: 0x55f76f60a865 - backtrace::backtrace::trace_unsynchronized::h73ea91d74a3fd67f [INFO] [stderr] at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.46/src/backtrace/mod.rs:66 [INFO] [stderr] 2: 0x55f76f60a865 - std::sys_common::backtrace::_print_fmt::hd42948c952866e12 [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:78 [INFO] [stderr] 3: 0x55f76f60a865 - ::fmt::ha8f928866ff7571e [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:59 [INFO] [stderr] 4: 0x55f76f62f69c - core::fmt::write::he0c1e5f7426d2718 [INFO] [stderr] at src/libcore/fmt/mod.rs:1076 [INFO] [stderr] 5: 0x55f76f606ee2 - std::io::Write::write_fmt::hf3afc6cfd57d0033 [INFO] [stderr] at src/libstd/io/mod.rs:1537 [INFO] [stderr] 6: 0x55f76f60d340 - std::sys_common::backtrace::_print::hfc0110703f3696fd [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:62 [INFO] [stderr] 7: 0x55f76f60d340 - std::sys_common::backtrace::print::h3f77c6990ddfaa22 [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:49 [INFO] [stderr] 8: 0x55f76f60d340 - std::panicking::default_hook::{{closure}}::heae49580a8d62d75 [INFO] [stderr] at src/libstd/panicking.rs:198 [INFO] [stderr] 9: 0x55f76f60d08c - std::panicking::default_hook::hecc34e3f729e213c [INFO] [stderr] at src/libstd/panicking.rs:217 [INFO] [stderr] 10: 0x55f76f60d983 - std::panicking::rust_panic_with_hook::he82f5d0644692441 [INFO] [stderr] at src/libstd/panicking.rs:526 [INFO] [stderr] 11: 0x55f76f60d57b - rust_begin_unwind [INFO] [stderr] at src/libstd/panicking.rs:437 [INFO] [stderr] 12: 0x55f76f60d4eb - std::panicking::begin_panic_fmt::h905a6d44880d49ef [INFO] [stderr] at src/libstd/panicking.rs:391 [INFO] [stderr] 13: 0x55f76f5b32f7 - cmake::fail::hc84e032425941401 [INFO] [stderr] at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/cmake-0.1.33/src/lib.rs:773 [INFO] [stderr] 14: 0x55f76f5b2c3e - cmake::run::h3d2b1c3e721d86a9 [INFO] [stderr] at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/cmake-0.1.33/src/lib.rs:754 [INFO] [stderr] 15: 0x55f76f5af531 - cmake::Config::build::h8efbc3e2894ba032 [INFO] [stderr] at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/cmake-0.1.33/src/lib.rs:666 [INFO] [stderr] 16: 0x55f76f5a1605 - cmake::build::hde9030113036ce42 [INFO] [stderr] at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/cmake-0.1.33/src/lib.rs:97 [INFO] [stderr] 17: 0x55f76f5a079b - build_script_build::main::hfc6ea10860b6f31d [INFO] [stderr] at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/glsl-to-spirv-0.1.6/build/build.rs:37 [INFO] [stderr] 18: 0x55f76f5a0aeb - std::rt::lang_start::{{closure}}::h058727addf44a6c6 [INFO] [stderr] at /rustc/04488afe34512aa4c33566eb16d8c912a3ae04f9/src/libstd/rt.rs:67 [INFO] [stderr] 19: 0x55f76f60dd53 - std::rt::lang_start_internal::{{closure}}::h5d3ea623498f5f43 [INFO] [stderr] at src/libstd/rt.rs:52 [INFO] [stderr] 20: 0x55f76f60dd53 - std::panicking::try::do_call::hac65e71be769a440 [INFO] [stderr] at src/libstd/panicking.rs:348 [INFO] [stderr] 21: 0x55f76f60dd53 - std::panicking::try::hd4706e264bcf6712 [INFO] [stderr] at src/libstd/panicking.rs:325 [INFO] [stderr] 22: 0x55f76f60dd53 - std::panic::catch_unwind::h948a0fb4a8b3ee82 [INFO] [stderr] at src/libstd/panic.rs:394 [INFO] [stderr] 23: 0x55f76f60dd53 - std::rt::lang_start_internal::h72cc068ed2d0ac53 [INFO] [stderr] at src/libstd/rt.rs:51 [INFO] [stderr] 24: 0x55f76f5a0ac7 - std::rt::lang_start::h745b1cbfbcace0bf [INFO] [stderr] at /rustc/04488afe34512aa4c33566eb16d8c912a3ae04f9/src/libstd/rt.rs:67 [INFO] [stderr] 25: 0x55f76f5a0a7a - main [INFO] [stderr] 26: 0x7fee34cdd0b3 - __libc_start_main [INFO] [stderr] 27: 0x55f76f59f1ae - _start [INFO] [stderr] 28: 0x0 - [INFO] running `Command { std: "docker" "inspect" "01716901799cc8e032fde1c409ee1a74af1436c43bad1eab792fb1e7201f015e", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "01716901799cc8e032fde1c409ee1a74af1436c43bad1eab792fb1e7201f015e", kill_on_drop: false }` [INFO] [stdout] 01716901799cc8e032fde1c409ee1a74af1436c43bad1eab792fb1e7201f015e