cmd/cgo: add a field `errTextRegexp` to all `ptrTest` that are expected to fail

[ariel-anieli]

This issue lays out the changes that will be done in pointer tests.

CL 711801 introduced the field errTextRegexp in the struct ptrTest; errTextRegexp contains the regexp that must be matched if a pointer test fails.

Below are the pointer tests that are expected to fail:

• ptr1
• ptr2
• ptrfield
• sliceptr1
• sliceptr2
• var1 CL 718900
• barrier
• barrierstruct
• barrierslice
• barriergcprogarray
• barriergcprogarrayheap
• barriergcprogstruct
• barriergcprogstructheap
• export1
• passstringslice
• retstring
• defer1
• union1
• slicedata
• arraypointer2 CL 718900
• argmap CL 711801
• retmap CL 711801

Roadmap

The changes will be done in two steps:

1. Add errTextRegexp to each test (see CL 718900).
2. When all tests will have their corresponding errTextRegexp, remove the default case introduced by CL 711801.

Verification

After errTextRegexp is added to a test, all pointer tests should succeed:

# pwd
/mnt/go

# cd src/
# ./run.bash cmd/cgo/internal/testerrors

##### Building packages and commands.

##### Test execution environment.
# GOARCH: amd64
# CPU: Intel(R) Core(TM) Ultra 7 155U
# GOOS: linux
# OS Version: Linux 6.16.3-76061603-generic #202508231538~1761055796~22.04~ba79424 SMP PREEMPT_DYNAMIC Tue O x86_64

##### Testing packages.
ok      cmd/cgo/internal/testerrors     2.495s

ALL TESTS PASSED (some were excluded)

[gopherbot]

Change https://go.dev/cl/718900 mentions this issue: cmd/cgo: add errTextRegexp to var and array pointer tests

[gabyhelp]

Related Code Changes

• runtime/cgo: improve error messages after pointer panic

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