panic: runtime error: index out of range [2] with length 0

[tobiasko]

Describe the bug

I am running a philosopher pipeline command. During the DB annotation step the following error is shown:

time="11:38:55" level=info msg="Executing Pipeline  v4.1.1"
time="11:38:55" level=info msg="Creating workspace"
time="11:38:55" level=warning msg="A meta data folder was found and will not be overwritten. "
time="11:38:55" level=info msg="Initiating the workspace on 20221101_C29563_002_S413457_RPA32-IP_Repl2_Group_1"
time="11:38:55" level=info msg="Creating workspace"
time="11:38:55" level=info msg="Initiating the workspace on 20221101_C29563_003_S413453_IgG-IP_Repl2_Control"
time="11:38:55" level=info msg="Creating workspace"
time="11:38:55" level=info msg="Initiating the workspace on 20221101_C29563_004_S413458_RPA32-IP_Repl3_Group_1"
time="11:38:55" level=info msg="Creating workspace"
time="11:38:55" level=info msg="Initiating the workspace on 20221101_C29563_005_S413455_IgG-IP_Repl4_Control"
time="11:38:55" level=info msg="Creating workspace"
time="11:38:55" level=info msg="Initiating the workspace on 20221101_C29563_007_S413459_RPA32-IP_Repl4_Group_1"
time="11:38:55" level=info msg="Creating workspace"
time="11:38:55" level=info msg="Initiating the workspace on 20221101_C29563_008_S413456_RPA32-IP_Repl1_Group_1"
time="11:38:55" level=info msg="Creating workspace"
time="11:38:55" level=info msg="Initiating the workspace on 20221101_C29563_009_S413454_IgG-IP_Repl3_Control"
time="11:38:55" level=info msg="Creating workspace"
time="11:38:55" level=info msg="Initiating the workspace on 20221101_C29563_010_S413452_IgG-IP_Repl1_Control"
time="11:38:55" level=info msg="Creating workspace"
time="11:38:55" level=info msg="Annotating the database"
panic: runtime error: index out of range [2] with length 0

goroutine 1 [running]:
philosopher/lib/dat.ProcessUniProtKB(0xc003661ec1, 0x37, 0xc00376f4d0, 0x86, 0xc000024f90, 0x4, 0x0, 0x0, 0x0, 0x0, ...)
        /home/prvst/workspace/philosopher/lib/dat/db.go:274 +0xc7f
philosopher/lib/dat.(*Base).ProcessDB(0xc00020eb80, 0xc000230280, 0x43, 0xc000024f90, 0x4)
        /home/prvst/workspace/philosopher/lib/dat/dat.go:132 +0x82d
philosopher/lib/dat.Run(0xc000027c80, 0x24, 0xc000230c30, 0x4d, 0xc000027cb0, 0x29, 0xc00002af00, 0x5c, 0xc00002af60, 0x53, ...)
        /home/prvst/workspace/philosopher/lib/dat/dat.go:64 +0xb34
philosopher/lib/pip.AnnotateDatabase(0xc000027b30, 0x24, 0xc000230b40, 0x4b, 0xc000027b60, 0x29, 0xc00002ade0, 0x5a, 0xc00002ae40, 0x51, ...)
        /home/prvst/workspace/philosopher/lib/pip/pip.go:140 +0x26c
philosopher/cmd.glob..func13(0x894f1a0, 0xc0001d5f40, 0x8, 0xa)
        /home/prvst/workspace/philosopher/cmd/pipeline.go:72 +0x41c
github.com/spf13/cobra.(*Command).execute(0x894f1a0, 0xc0001d5e00, 0xa, 0xa, 0x894f1a0, 0xc0001d5e00)
        /home/prvst/go/pkg/mod/github.com/spf13/cobra@v0.0.6/command.go:844 +0x2aa
github.com/spf13/cobra.(*Command).ExecuteC(0x894fc20, 0x0, 0x0, 0x0)
        /home/prvst/go/pkg/mod/github.com/spf13/cobra@v0.0.6/command.go:945 +0x317
github.com/spf13/cobra.(*Command).Execute(...)
"philosopher.2.txt" 43L, 3086C                                                                                                                          1,1           Top

This error always appears as soon as I add the following sequence as a spike-in to the DB:

>sp|ADD001|iRT-Kit_WR_fusion iRT-Kit WR fusion GN=iRTKit
LGGNEQVTRYILAGVENSKGTFIIDPGGVIRGTFIIDPAAVIRGAGSSEPVTGLDAKTPVISGGPYEYRVEATFGVDESNAKTPVITGAPYEYRDGLDAASYYAPVRADVTPADFSEWSKLFLQFGAQGSPFL

Please complete the following information:

• OS: Linux
• Version: 4.1.1

Additional context

The fasta DB is written to disc and contains the respective spike-ins:

tobiasko@fgcz-c-073:/scratch/FRAGPIPE/WU282798$ grep iRT 2022-11-03-decoys-contam-UP000005640.fas 
>rev_sp|ADD001|iRT-Kit_WR_fusion iRT-Kit WR fusion GN=iRTKit
>sp|ADD001|iRT-Kit_WR_fusion iRT-Kit WR fusion GN=iRTKit

I can suppress this behaviour by changing the FASTA header line to:

>sp|ADD001|iRT-Kit_WR_fusion iRT-Kit_WR_fusion
LGGNEQVTRYILAGVENSKGTFIIDPGGVIRGTFIIDPAAVIRGAGSSEPVTGLDAKTPVISGGPYEYRVEATFGVDESNAKTPVITGAPYEYRDGLDAASYYAPVRADVTPADFSEWSKLFLQFGAQGSPFLK

[prvst]

Your sequence was not exactly matching the UniProt standard, but I did some changes and now it should be good.

Fixed. Added to v5.0.0