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panic: sql: Register called twice for driver odbc when running `go test` on Linux #17

Closed GoogleCodeExporter closed 9 years ago

GoogleCodeExporter commented 9 years ago 
What steps will reproduce the problem?
1. hg clone https://code.google.com/p/odbc/
2. cd odbc/
3. go test

What is the expected output? What do you see instead?
I see :

panic: sql: Register called twice for driver odbc

goroutine 1 [running]:
database/sql.Register(0x81483d8, 0x4, 0x1834f680, 0x8204060)
        /usr/local/go/src/pkg/database/sql/sql.go:31 +0xe1
_/home/bbigras/odbc.init·1()
        /home/bbigras/odbc/driver.go:74 +0x72
_/home/bbigras/odbc.init()
        /home/bbigras/odbc/mssql_test.go:864 +0x1610
main.init()
        _/home/bbigras/odbc/_test/_testmain.go:34 +0x3e

goroutine 2 [syscall]:
exit status 2
FAIL    _/home/bbigras/odbc     0.093s

What version of the product are you using? On what operating system?
go version go1.1.2 linux/386
freetds 0.82-6build1
tdsodbc 0.82-6build1
unixodbc 2.2.11-21
Ubuntu 10.04.4 LTS

Please provide any additional information below.

Original issue reported on code.google.com by bigras.b...@gmail.com on 21 Aug 2013 at 8:38

GoogleCodeExporter commented 9 years ago 
Note that I have the same error message on Windows 7 64 bit
go version go1.1.2 windows/amd64

Original comment by bigras.b...@gmail.com on 22 Aug 2013 at 8:14

GoogleCodeExporter commented 9 years ago 
Are you sure you didn't change any source files? Please, provide output of "hg 
st" and "hg id". Thank you.

Alex

Original comment by alex.bra...@gmail.com on 23 Aug 2013 at 2:24

GoogleCodeExporter commented 9 years ago 
I just tested on a second Linux server. 

Note that I had to set a GOPATH and do `go get` because `go test` wasn't able 
to find odbc/api.
$ go test
column.go:8:2: cannot find package "code.google.com/p/odbc/api" in any of:
        /usr/local/go/src/pkg/code.google.com/p/odbc/api (from $GOROOT)
        ($GOPATH not set)

$ go test
warning: building out-of-date packages:
        code.google.com/p/odbc/api
        code.google.com/p/odbc
installing these packages with 'go test -i' will speed future tests.

panic: sql: Register called twice for driver odbc

goroutine 1 [running]:
database/sql.Register(0x81481d8, 0x4, 0x1834f680, 0x8205060)
        /usr/local/go/src/pkg/database/sql/sql.go:31 +0xe1
_/home/bbigras/t/odbc.init·1()
        /home/bbigras/t/odbc/driver.go:74 +0x72
_/home/bbigras/t/odbc.init()
        /home/bbigras/t/odbc/mssql_test.go:864 +0x1610
main.init()
        _/home/bbigras/t/odbc/_test/_testmain.go:34 +0x3e

goroutine 2 [syscall]:

goroutine 3 [runnable]:
exit status 2
FAIL    _/home/bbigras/t/odbc   0.054s

$ hg st
$ hg id
e76d703f5f45 tip

Original comment by bigras.b...@gmail.com on 23 Aug 2013 at 2:40

GoogleCodeExporter commented 9 years ago 
I think you didn't setup your environment properly. What is the full path to 
odbc directory? Also tell me what is GOPATH set to. Thank you.

Alex

Original comment by alex.bra...@gmail.com on 26 Aug 2013 at 2:14

GoogleCodeExporter commented 9 years ago 
I tested on another computer running XP with go version go1.1.2 windows/386.

Here's what I did:

C:\>d:

D:\>mkdir odbc

D:\>cd odbc

D:\odbc>hg clone https://code.google.com/p/odbc/
destination directory: odbc
requesting all changes
adding changesets
adding manifests
adding file changes
added 19 changesets with 62 changes to 31 files
updating to branch default
31 files updated, 0 files merged, 0 files removed, 0 files unresolved

D:\odbc>mkdir GOPATH

D:\odbc>set GOPATH=d:\odbc\GOPATH

D:\odbc>cd GOPATH

D:\odbc\GOPATH>cd ..

D:\odbc>cd odbc

D:\odbc\odbc>go test
column.go:8:2: cannot find package "code.google.com/p/odbc/api" in any of:
        C:\Go\src\pkg\code.google.com\p\odbc\api (from $GOROOT)
        d:\odbc\GOPATH\src\code.google.com\p\odbc\api (from $GOPATH)

D:\odbc\odbc>go get
go install: no install location for directory D:\odbc\odbc outside GOPATH

D:\odbc\odbc>go test
warning: building out-of-date packages:
        code.google.com/p/odbc/api
        code.google.com/p/odbc
installing these packages with 'go test -i' will speed future tests.

panic: sql: Register called twice for driver odbc

goroutine 1 [running]:
database/sql.Register(0x505c38, 0x4, 0x10f11ec0, 0x5c7c20)
        C:/Users/ADMINI~1/AppData/Local/Temp/2/bindist465310315/go/src/pkg/database/sql/sql.go:31 +0xe3
_/D_/odbc/odbc.init┬À1()
        D:/odbc/odbc/driver.go:74 +0x74
_/D_/odbc/odbc.init()
        D:/odbc/odbc/mssql_test.go:864 +0x1612
main.init()
        C:/DOCUME~1/bbigras/LOCALS~1/Temp/go-build059931739/_/D_/odbc/odbc/_test
/_testmain.go:34 +0x40
exit status 2
FAIL    _/D_/odbc/odbc  0.438s

Original comment by bigras.b...@gmail.com on 26 Aug 2013 at 2:46

GoogleCodeExporter commented 9 years ago 
> Here's what I did:
> 
> C:\>d:
> 
> D:\>mkdir odbc
> 
> D:\>cd odbc
> 
> D:\odbc>hg clone https://code.google.com/p/odbc/
> destination directory: odbc
> requesting all changes
> adding changesets
> adding manifests
> adding file changes
> added 19 changesets with 62 changes to 31 files
> updating to branch default
> 31 files updated, 0 files merged, 0 files removed, 0 files unresolved

Now you have odbc package installed in d:\odbc\odbc directory.

> D:\odbc>mkdir GOPATH
> 
> D:\odbc>set GOPATH=d:\odbc\GOPATH

Now you have GOPATH environment set to d:\odbc\GOPATH directory.

> D:\odbc>cd GOPATH
> 
> D:\odbc\GOPATH>cd ..
> 
> D:\odbc>cd odbc
> 
> D:\odbc\odbc>go test
> column.go:8:2: cannot find package "code.google.com/p/odbc/api" in any of:
>         C:\Go\src\pkg\code.google.com\p\odbc\api (from $GOROOT)
>         d:\odbc\GOPATH\src\code.google.com\p\odbc\api (from $GOPATH)

This fails because Go is trying to build package in your CURRENT directory 
(d:\odbc\odbc). The package imports (amongst many other things) 
"code.google.com/p/odbc/api" package (see for example column.go file). It looks 
for that package in 2 locations: GOROOT - it is not there, GOPATH (you set it 
to d:\odbc\GOPATH) - it is completely empty. So Go stops and complains.

> D:\odbc\odbc>go get
> go install: no install location for directory D:\odbc\odbc outside GOPATH

This downloads (and installs) ALL MISSING packages used by package in your 
CURRENT directory (d:\odbc\odbc). It downloads "code.google.com/p/odbc/api" 
package into your GOPATH (into d:\odbc\GOPATH\src\code.google.com\p\odbc\api 
directory). code.google.com/p/odbc gets downloaded as well, becuase it is part 
of the same repository.

So now you have 2 same odbc packages, but in 2 different locations - one inside 
GOPATH in d:\odbc\GOPATH\src\code.google.com\p\odbc and the other is in your 
current directory.

> D:\odbc\odbc>go test
> warning: building out-of-date packages:
>         code.google.com/p/odbc/api
>         code.google.com/p/odbc
> installing these packages with 'go test -i' will speed future tests.
> 
> panic: sql: Register called twice for driver odbc
> 
> goroutine 1 [running]:
> database/sql.Register(0x505c38, 0x4, 0x10f11ec0, 0x5c7c20)
>         
C:/Users/ADMINI~1/AppData/Local/Temp/2/bindist465310315/go/src/pkg/database/sql/
sql.go:31 +0xe3
> _/D_/odbc/odbc.init┬À1()
>         D:/odbc/odbc/driver.go:74 +0x74
> _/D_/odbc/odbc.init()
>         D:/odbc/odbc/mssql_test.go:864 +0x1612
> main.init()
>         
C:/DOCUME~1/bbigras/LOCALS~1/Temp/go-build059931739/_/D_/odbc/odbc/_test
> /_testmain.go:34 +0x40
> exit status 2
> FAIL    _/D_/odbc/odbc  0.438s

This will build test, but will include both odbc packages. It includes package 
in current directory because that is what Go command does with current directry 
files. It includes package in d:\odbc\GOPATH\src\code.google.com\p\odbc, 
because you refer to it in your program.

So it is a mess. Don't do that. You should always work inside of %GOPATH%\src 
directory. Just like that:

go command is in my PATH, but no GO environment variables are set:

C:\>go version
go version devel +c3bf615ba223 Tue Aug 27 14:33:05 2013 +1000 windows/386

C:\>set | find "GO"

C:\>

Lets set GOPATH:

C:\>set GOPATH=c:\b

C:\>

and download code.google.com/p/odbc package into new created workspace defined 
by GOPATH:

C:\>go get -v code.google.com/p/odbc
code.google.com/p/odbc (download)
code.google.com/p/odbc/api
code.google.com/p/odbc

C:\>

Lets change to odbc package directory and run test:

C:\>cd %GOPATH%\src\code.google.com\p\odbc\

C:\b\src\code.google.com\p\odbc>go test -mssrv=MYSRV -msdb=MYDB -msuser=MYUSER 
-mspass=MYPASS -v -run=MS
=== RUN TestMSSQLCreateInsertDelete
--- PASS: TestMSSQLCreateInsertDelete (0.31 seconds)
=== RUN TestMSSQLTransactions
--- PASS: TestMSSQLTransactions (0.13 seconds)
=== RUN TestMSSQLTypes
--- PASS: TestMSSQLTypes (0.08 seconds)
=== RUN TestMSSQLIntAfterText
--- PASS: TestMSSQLIntAfterText (0.00 seconds)
=== RUN TestMSSQLStmtAndRows
--- PASS: TestMSSQLStmtAndRows (0.03 seconds)
=== RUN TestMSSQLIssue5
--- PASS: TestMSSQLIssue5 (0.28 seconds)
=== RUN TestMSSQLDeleteNonExistent
--- PASS: TestMSSQLDeleteNonExistent (0.02 seconds)
PASS
ok      code.google.com/p/odbc  0.984s

C:\b\src\code.google.com\p\odbc>

I hope it helps.

Alex

Alex

Original comment by alex.bra...@gmail.com on 27 Aug 2013 at 5:44