https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61877
Bug ID: 61877 Summary: [4.10 Regression]: reflect: cannot use []string as type string in Call Product: gcc Version: 4.10.0 Status: UNCONFIRMED Severity: major Priority: P3 Component: go Assignee: ian at airs dot com Reporter: lists at kambanaria dot org CC: cmang at google dot com Created attachment 33171 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=33171&action=edit test case that can be executed with "go test -compiler gccgo -test.v reflect_test" There is a regression in the runtime behavior of the reflection module. Attached is a very simple ( < 30 lines) test case (that can be execured via go test command). I hope this can be included in the normal test suite Expected behavior: go run -compiler gccgo src/ref_main.go go test -compiler gccgo -test.v reflect_test should result in: === RUN TestFindingVarargMethod --- PASS: TestFindingVarargMethod (0.00 seconds) PASS ok Actual behavior: === RUN TestFindingVarargMethod --- FAIL: TestFindingVarargMethod (0.00 seconds) panic: reflect: cannot use []string as type string in Call [recovered] panic: reflect: cannot use []string as type string in Call goroutine 20 [running]: testing.$nested5 ../.././libgo/go/testing/testing.go:406 reflect.call.N13_reflect.Value ../.././libgo/go/reflect/value.go:494 reflect.Call.N13_reflect.Value ../.././libgo/go/reflect/value.go:412 reflect.call.pN20_reflect.makeFuncImpl ../.././libgo/go/reflect/makefunc.go:198 reflect.MakeFuncStubGo ../.././libgo/go/reflect/makefuncgo_amd64.go:322 reflect_test_test.TestFindingVarargMethod /home/ashopov/WORK/GO/src/reflect_test/finder_test.go:19 testing.tRunner ../.././libgo/go/testing/testing.go:422 created by testing.RunTests ../.././libgo/go/testing/testing.go:504 goroutine 16 [chan receive]: testing.RunTests ../.././libgo/go/testing/testing.go:505 testing.Main ../.././libgo/go/testing/testing.go:435 main.main /tmp/go-build886615920/reflect_test/_test/_testmain.go:47 created by main ../.././libgo/runtime/go-main.c:42 goroutine 18 [finalizer wait]: created by runtime_createfing ../.././libgo/runtime/mgc0.c:2596 exit status 2 FAIL reflect_test 0.058s This test case is WORKING fine with: 1. golang-pkg-bin-linux-amd64-1.2.2-7 distributed with Fedora 20 which corresponds to 2. gcc 4.9: gcc -v Using built-in specs. COLLECT_GCC=gcc COLLECT_LTO_WRAPPER=/home/ashopov/WORK/GCC/libexec/gcc/x86_64-linux-gnu/4.9.1/lto-wrapper Target: x86_64-linux-gnu Configured with: ../configure --prefix=/home/ashopov/WORK/GCC --build=x86_64-linux-gnu --disable-browser-plugin --disable-libgcj --disable-libmudflap --disable-vtable-verify --disable-libunwind-exceptions --enable-checking=release --disable-bootstrap --enable-__cxa_atexit --enable-gnu-unique-object --enable-languages=c,c++,go,lto --enable-linker-build-id --enable-multilib --enable-plugin --enable-shared --enable-threads=posix --with-linker-hash-style=gnu --with-system-zlib --with-tune=generic --enable-multiarch Thread model: posix gcc version 4.9.1 20140709 (prerelease) (GCC) This test case is FAILING with: 1. gcc 4.10 gcc -v Using built-in specs. COLLECT_GCC=gcc COLLECT_LTO_WRAPPER=/home/ashopov/WORK/GCC-TRUNK/libexec/gcc/x86_64-linux-gnu/4.10.0/lto-wrapper Target: x86_64-linux-gnu Configured with: ./configure --prefix=/home/ashopov/WORK/GCC-TRUNK --build=x86_64-linux-gnu --disable-browser-plugin --disable-libgcj --disable-libmudflap --disable-vtable-verify --disable-libunwind-exceptions --enable-checking=release --disable-bootstrap --enable-__cxa_atexit --enable-gnu-unique-object --enable-languages=c,c++,go,lto --enable-linker-build-id --enable-multilib --enable-plugin --enable-shared --enable-threads=posix --with-linker-hash-style=gnu --with-system-zlib --with-tune=generic --enable-multiarch Thread model: posix gcc version 4.10.0 20140721 (experimental) (GCC) Machine used for tests: uname -a Linux ashopov-dev 3.15.6-200.fc20.x86_64 #1 SMP Fri Jul 18 02:36:27 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux