Files emitted to topic channels clobber process outputs (strict syntax only) #6684
Description
Bug report
Using the new strict syntax, files emitted to a topic channel seem to clobber files declared in the output section.
nextflow.preview.types = true
process TEST {
output:
vcf: Path = file("file.vcf.gz")
tbi: Path = file("file.vcf.gz.tbi")
topic:
file("foo.txt") >> 'foo'
script:
"""
touch file.vcf.gz{,.tbi}
touch foo.txt
"""
}
workflow {
TEST()
TEST.out.vcf.view { v -> "vcf: ${v}" }
TEST.out.tbi.view { v -> "tbi: ${v}" }
}
Program output
N E X T F L O W ~ version 25.12.0-edge
Launching `main.nf` [elegant_hopper] DSL2 - revision: 2d0edb6005
executor > local (1)
[ae/253dde] process > TEST [100%] 1 of 1 ✔
vcf: /path/to/work/ae/253ddee30c7eb89c4c4f5a07d80720/foo.txt
tbi: /path/to/work/ae/253ddee30c7eb89c4c4f5a07d80720/file.vcf.gz.tbi
Expected output
vcf: /path/to/work/ae/253ddee30c7eb89c4c4f5a07d80720/file.vcf.gz
tbi: /path/to/work/ae/253ddee30c7eb89c4c4f5a07d80720/file.vcf.gz.tbi
Environment
- Nextflow version: 25.12.0-edge
- Java version: openjdk 17.0.17 2025-10-21
- Operating system: Linux
- Bash version: GNU bash, version 5.3.3(1)-release (x86_64-pc-linux-gnu)