Closed
Description
by imgx64:
Before filing a bug, please check whether it has been fixed since the latest release: run "hg pull -u" and retry what you did to reproduce the problem. Thanks. What steps will reproduce the problem? Run any of the following: echo 'package main' | gofmt -r 'x->foo' echo -e 'package main\nvar x int' | gofmt -r 'x->foo' echo -e 'package main\nvar xx int' | gofmt -r 'xx->foo' echo -e 'package main\nvar xx int = yy+zz' | gofmt -r 'a+b->a*b' What is the expected output? Input is correctly formatted and the rewrite rule applied. What do you see instead? panic: runtime error: invalid memory address or nil pointer dereference panic PC=0x7fd6407bcba8 runtime.panic+0xa7 /opt/go/src/pkg/runtime/proc.c:1032 runtime.panic(0x498e5c, 0x7fd6407ff2a0) runtime.panicstring+0x69 /opt/go/src/pkg/runtime/runtime.c:83 runtime.panicstring(0x5ab8bf, 0x4c6da8) runtime.sigpanic+0x144 /opt/go/src/pkg/runtime/linux/thread.c:286 runtime.sigpanic() go/ast.*CommentGroup·Pos+0x1c /opt/go/src/pkg/go/ast/ast.go:85 go/ast.*CommentGroup·Pos(0x0, 0x49c114, 0x0, 0x7fd6407b8b10) main._func_003+0x1bf /opt/go/src/cmd/gofmt/rewrite.go:61 main._func_003(0x7fd6407b7268, 0x7fd6407b7280, 0x7fd6407ff280, 0x7fd6407ff290, 0x402388, ...) main.apply+0x24d /opt/go/src/cmd/gofmt/rewrite.go:94 main.apply(0x7fd6407cb9b0, 0x7fd6407e8480, 0x7fd6407dc720, 0x7fd6407dc720, 0x7fd6407ff280, ...) main.rewriteFile+0x1bc /opt/go/src/cmd/gofmt/rewrite.go:65 main.rewriteFile(0x7fd6407d0700, 0x7fd6407dc7e0, 0x7fd6407d0700, 0x7fd6407dc7c0, 0x7fd6407d0b80, ...) main._func_002+0x41 /opt/go/src/cmd/gofmt/rewrite.go:31 main._func_002(0x7fd6407ff3f0, 0x7fd6407ff370, 0x40106e, 0x7fd6407d0b80, 0x4767dc, ...) main.processFile+0x1ec /opt/go/src/cmd/gofmt/gofmt.go:109 main.processFile(0x7fd6407b83c0, 0x500000000, 0x7fd6407e1540, 0x40852e) main.main+0x159 /opt/go/src/cmd/gofmt/gofmt.go:202 main.main() runtime.mainstart+0xf /opt/go/src/pkg/runtime/amd64/asm.s:77 runtime.mainstart() runtime.goexit /opt/go/src/pkg/runtime/proc.c:148 runtime.goexit() Which compiler are you using (5g, 6g, 8g, gccgo)? 6g Which operating system are you using? Linux, Ubuntu 10.04 Which revision are you using? (hg identify) e86b22981073 tip Please provide any additional information below. I can't find a pattern to crashes. They might be more than one bug.