TestCSmith `all_test.go:1653: --bitfields --max-nested-struct-level 10 --no-const-pointers --no-consts --no-packed-struct --no-volatile-pointers --no-volatiles --paranoid -s 1885311141` ``` unexpected fault address 0x7ff3b1a00038 fatal error: fault [signal SIGSEGV: segmentation violation code=0x1 addr=0x7ff3b1a00038 pc=0x4c3c53] goroutine 1 [running, locked to thread]: runtime.throw(0x5140c3, 0x5) /home/jnml/src/go.googlesource.com/go/goroot/src/runtime/panic.go:1116 +0x72 fp=0xc0000ca5d0 sp=0xc0000ca5a0 pc=0x433db2 runtime.sigpanic() /home/jnml/src/go.googlesource.com/go/goroot/src/runtime/signal_unix.go:749 +0x405 fp=0xc0000ca600 sp=0xc0000ca5d0 pc=0x447e45 modernc.org/libc.(*TLS).Alloc(0xc00013c000, 0x2ec0, 0xa09ed0009f815) /home/jnml/src/modernc.org/libc/etc.go:232 +0xd3 fp=0xc0000ca630 sp=0xc0000ca600 pc=0x4c3c53 main.func_46(0xc00013c000, 0x0, 0xfb00) /tmp/ccgo-test-703077681/main.go:5845 +0x7a fp=0xc0000cd090 sp=0xc0000ca630 pc=0x4d277a main.func_4.func1(0xc00013c000, 0xf359a124, 0xfbb7, 0xfffffffffffffff9, 0x3cd51dc9, 0xffffffff, 0x7ff3b2700b90, 0x5cd044, 0x7ff3b2700b90, 0xffff68a00004a4f, ...) /tmp/ccgo-test-703077681/main.go:2452 +0x1c5 fp=0xc0000cd120 sp=0xc0000cd090 pc=0x4e30a5 main.func_4(0xc00013c000, 0x999f2c0599860000, 0x5b06a83cd0cd8a6c, 0x0, 0x9a429381d0cd8a6c, 0x0, 0x0, 0x0, 0x0) /tmp/ccgo-test-703077681/main.go:2457 +0x4e5 fp=0xc0000cd3a8 sp=0xc0000cd120 pc=0x4cba45 main.func_1.func1(0xc00013c000, 0x5cd02e, 0x7ff3b2700100, 0x61b450, 0x9c6f74299c57b4fd) /tmp/ccgo-test-703077681/main.go:1945 +0xd3 fp=0xc0000cd400 sp=0xc0000cd3a8 pc=0x4e2c13 main.func_1(0xc00013c000, 0x0) /tmp/ccgo-test-703077681/main.go:1951 +0x949 fp=0xc0000cde28 sp=0xc0000cd400 pc=0x4ca8c9 main.main1(0xc00013c000, 0x1, 0x7ff3b2500020, 0x0) /tmp/ccgo-test-703077681/main.go:12787 +0xcc fp=0xc0000cdef8 sp=0xc0000cde28 pc=0x4e04ac modernc.org/libc.Start(0x523868) /home/jnml/src/modernc.org/libc/libc.go:89 +0x107 fp=0xc0000cdf70 sp=0xc0000cdef8 pc=0x4c4467 main.main() /tmp/ccgo-test-703077681/main.go:18 +0x2d fp=0xc0000cdf88 sp=0xc0000cdf70 pc=0x4c974d runtime.main() /home/jnml/src/go.googlesource.com/go/goroot/src/runtime/proc.go:204 +0x209 fp=0xc0000cdfe0 sp=0xc0000cdf88 pc=0x4365a9 runtime.goexit() /home/jnml/src/go.googlesource.com/go/goroot/src/runtime/asm_amd64.s:1374 +0x1 fp=0xc0000cdfe8 sp=0xc0000cdfe0 pc=0x465101 exit status 2 ccgo: exit status 1 ``` etc:232 is here: https://gitlab.com/cznic/libc/-/blob/627b5c9908e1a7c09ccdf87c27d15b0f7669da7c/etc.go#L232 @amfiremage Please take a look. Bisecting now, will report back when finished.