panic: could not match regexp

[mikowiec]

Test 1 Precondition:
Windows 7, SP1, 32 bit
Visual Studio 2015 community edition
LLVM-3.9.1-win32
Windows 10 SDK (10.0.15063.468)
go version go1.8.1 windows/386

Test 2 Precondition:
mac 1.9.5
go version go1.8.1 darwin/amd64

\go\c2go>c2go transpile examples\fib.c
panic: could not match regexp '(?P

[0-9a-fx]+) <(?P.)> "(?P.?)"(?P ".*?")?' with string 'DeprecatedAttr 0x3b732f0 line:1107:12 Inherited "This function or variable may be unsafe. Consider using _snwprintf_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details." ""'

goroutine 1 [running]:
github.com/elliotchance/c2go/ast.groupsFromRegex(0x57acb2, 0x3b, 0x120594a8, 0xd6, 0x56f0c4)
E:/dev/gocode/src/github.com/elliotchance/c2go/ast/ast.go:407 +0x2a7
github.com/elliotchance/c2go/ast.parseDeprecatedAttr(0x120594a8, 0xd6, 0x571939)
E:/dev/gocode/src/github.com/elliotchance/c2go/ast/deprecated_attr.go:15 +0x3f
github.com/elliotchance/c2go/ast.Parse(0x120594a8, 0xd6, 0xda, 0x11c189c0)
E:/dev/gocode/src/github.com/elliotchance/c2go/ast/ast.go:276 +0x1dbb
main.convertLinesToNodes(0x11c7a000, 0x18a5, 0x18a5, 0x11c7a000, 0x18a5, 0x18a5)
E:/dev/gocode/src/github.com/elliotchance/c2go/main.go:66 +0x165
main.Start(0x0, 0x11c4d8c0, 0xe, 0x0, 0x0, 0x56f599, 0x4, 0x11c48118, 0x8)
E:/dev/gocode/src/github.com/elliotchance/c2go/main.go:191 +0x628
main.main()
E:/dev/gocode/src/github.com/elliotchance/c2go/main.go:305 +0x2c2

[mikowiec]

I've got the same issue for mac 10.9.5

[elliotchance]

Hi @mikowiec this error is caused by it not able to understand a line outputted from clang - likely because it has extra special characters (like double quotes) that make it not match the expected regex.

The fix is to add a new test case, just like this one:

https://github.com/elliotchance/c2go/blob/master/ast/deprecated_attr_test.go#L9-L15

This will cause go test to fail (for the same reason) and then this regex needs to be adjusted:

https://github.com/elliotchance/c2go/blob/master/ast/deprecated_attr.go#L13

Are you feeling up to the challenge? 😄

[mikowiec]

Tell me, please, what golang version do you compile?

there is log from 1.8.1 golang, mac 1.9.5:
➜ c2go2 ./c2go transpile prime.c
panic: could not match regexp '(?P

[0-9a-fx]+) <(?P.*)> always_inline' with string 'AlwaysInlineAttr 0x102882a40 line:346:24'

goroutine 1 [running]:
github.com/elliotchance/c2go/ast.groupsFromRegex(0x11b7973, 0x20, 0x4213ba9df, 0x2a, 0x4212cf3a0)
/Users/xxxxxxxx/gocode/src/github.com/elliotchance/c2go/ast/ast.go:407 +0x392
github.com/elliotchance/c2go/ast.parseAlwaysInlineAttr(0x4213ba9df, 0x2a, 0x11b3b65)
/Users/xxxxxxxx/gocode/src/github.com/elliotchance/c2go/ast/always_inline_attr.go:13 +0x4e
github.com/elliotchance/c2go/ast.Parse(0x4213ba9df, 0x2a, 0x2e, 0x42133c330)
/Users/xxxxxxxx/gocode/src/github.com/elliotchance/c2go/ast/ast.go:236 +0x2a0c
main.convertLinesToNodes(0x4213c0000, 0x268, 0x268, 0x4213c0000, 0x268, 0x268)
/Users/xxxxxxxx/gocode/src/github.com/elliotchance/c2go/main.go:65 +0x1ef
main.Start(0x0, 0x7fff5fbff669, 0x7, 0x0, 0x0, 0x11b148f, 0x4, 0x4212da330, 0x421334268)
/Users/xxxxxxxx/gocode/src/github.com/elliotchance/c2go/main.go:162 +0x788
main.main()
/Users/xxxxxxxx/gocode/src/github.com/elliotchance/c2go/main.go:276 +0x373

and there golang 1.6.2 and c2go version from april:
➜ c2go1 ./c2go transpile prime.c
panic: stat transpile: no such file or directory

goroutine 1 [running]:
panic(0x1c3d80, 0x8203745a0)
/usr/local/go/src/runtime/panic.go:481 +0x3e6
main.Check(0x88203c0290, 0x8203745a0)
/Users/xxxxxx/gocode/src/github.com/elliotchance/c2go/main.go:126 +0x4b
main.Start(0x820374370, 0x2, 0x2, 0x0, 0x0)
/Users/xxxxxx/gocode/src/github.com/elliotchance/c2go/main.go:139 +0x139
main.main()
/Users/xxxxxx/gocode/src/github.com/elliotchance/c2go/main.go:206 +0xaaxxxxxx

[Konstantin8105]

I use:

go version

Output:

go version go1.8.3 linux/amd64

Also,

clang --version

Output:

clang version 3.8.0-2ubuntu4 (tags/RELEASE_380/final)
Target: x86_64-pc-linux-gnu
Thread model: posix
InstalledDir: /usr/bin

[Konstantin8105]

In according to integration test of c2go https://github.com/elliotchance/c2go/blob/master/.travis.yml , guarantee supported next version of clang 3.4 ... 3.9, OS linux, osx:

os:
  - linux
  - osx

env:
  - CLANG=3.9

matrix:
  include:
    - env: CLANG=3.8
      os: linux
    - env: CLANG=3.7
      os: linux
    - env: CLANG=3.6
      os: linux
    - env: CLANG=3.4
      os: linux

[mikowiec]

➜ clang --version
Apple LLVM version 6.0 (clang-600.0.57) (based on LLVM 3.5svn)
Target: x86_64-apple-darwin13.4.0
Thread model: posix

[Konstantin8105]

@mikowiec Thank you for result of 2 checking.
I see 2 different errors. I haven't any recommendations, except : try install clang in list 3.4,3.6,3.7,3.8 for your Mac desktop and update Go for Win.

[mikowiec]

update Go for Win

x>c2go transpile prime.c
panic: could not match regexp '(?P

[0-9a-fx]+) <(?P.)> "(?P.?)"(?P ".*?")?' with
string 'DeprecatedAttr 0xad3460 line:1107:12 Inherited "This function or variable may be unsafe. Consider using _snwp
rintf_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details." ""'

goroutine 1 [running]:
github.com/elliotchance/c2go/ast.groupsFromRegex(0x57ad8f, 0x3b, 0x11bee8dc, 0xd5, 0x56f184)
/src/github.com/elliotchance/c2go/ast/ast.go:407 +0x2a7
github.com/elliotchance/c2go/ast.parseDeprecatedAttr(0x11bee8dc, 0xd5, 0x5719f9)
/src/github.com/elliotchance/c2go/ast/deprecated_attr.go:15 +0x3f
github.com/elliotchance/c2go/ast.Parse(0x11bee8dc, 0xd5, 0xd9, 0x11acaf80)
/src/github.com/elliotchance/c2go/ast/ast.go:276 +0x1dbb
main.convertLinesToNodes(0x11820000, 0x18ba, 0x18ba, 0x11820000, 0x18ba, 0x18ba)
/src/github.com/elliotchance/c2go/main.go:66 +0x165
main.Start(0x0, 0x117c2190, 0x7, 0x0, 0x0, 0x56f659, 0x4, 0x117c4128, 0x8)
/src/github.com/elliotchance/c2go/main.go:191 +0x628
main.main()
/src/github.com/elliotchance/c2go/main.go:305 +0x2c2

go version
go version go1.8.3 windows/386

[Konstantin8105]

@mikowiec Thank you for update.
So, what we check? Versions of Golang, Clang.
But - What the version of glibc?
For integration test used glibc 2.24-9.
On my laptop:

[mikowiec]

osx mac does not have ldd.
The osx equivalent is called otool -L
command "otool -L ./c2go" show me nothing shared library used.

[Konstantin8105]

Main point - find version of standard library C.
Maybe https://stackoverflow.com/questions/9705660/check-glibc-version-for-a-particular-gcc-compiler help to find.
I will try today to check c2go with old glibc.

[mikowiec]

osx base system does not use glibc

[elliotchance]

@Konstantin8105, Apple has a fork of clang that uses a different versioning scheme. It is not something that can be tested on travis.

The issue here is simple - it has nothing to do with clang versions or programs install. clang is outputting a line that is not understood by c2go's parsing mechanism. It is fixed by making the changes I outlined in my comment #184 (comment)

[mikowiec]

@elliotchance

this regex needs to be adjusted.

exactly.
I've resolved this issue and it will be fixed soon.

[Konstantin8105]

Like I understood - that issue is closed.

[elliotchance]

@Konstantin8105 feel free to close this issue if it is resolved.

[Konstantin8105]

:) I haven't permission for that