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Template::Like filehandle input does not populate scalar-reference output #1216
Description
Summary
Template::Like 0.12 fails its filehandle-input test under both PerlOnJava backends. The same suite passes completely under system Perl.
Reproduction
use strict;
use warnings;
use Test::More tests => 1;
use Template::Like;
my $path = "template-like-repro-$$.tmpl";
END { unlink $path }
open my $write_fh, ">", $path or die "create $path: $!";
print {$write_fh} "[% group %]\\n";
close $write_fh;
open my $input_fh, "<", $path or die "open $path: $!";
my $template = Template::Like->new;
my $output;
$template->process($input_fh, { group => "hoge foo bar" }, \\$output)
or die "process failed";
close $input_fh;
is($output, "hoge foo bar\\n", "filehandle input writes to scalar output");Results
- System Perl: passes all 119 tests in the distribution.
- PerlOnJava JVM backend: the reproducer fails; the output scalar is empty/undefined.
- PerlOnJava interpreter backend: same failure.
- Other
Template::Likeinput forms in the distribution test pass.
The archived CPAN run 20260902-105746-25731 recorded this as a regression: the previous pass was on 2026-08-18 at commit e9739bcbf. The original failing test is t/input.t, test 3 (filehandle).
Likely area for investigation: shared filehandle input and scalar-reference output handling in Template::Like->process().
Activity
fglock commentedon Oct 13, 2026
Follow-up while PR #1781 is in CI:
t/input.tpasses on system Perl. On this branch the JVM backend passes its filehandle assertion, but the interpreter run still fails that assertion (and related file-based input assertions) after earlier test cases have run.PR #1781 adds focused coverage for scalar-reference output from filehandle input, but does not resolve this broader interpreter-only sequence failure. Please leave this issue open for that follow-up.
fglock commentedon Nov 4, 2026
State: released
Agent/session: codex-2026-11-04-io-regressions
Scope: #1216; verify Template::Like filehandle input to scalar-reference output.
Work: ready-for-review PR #1971, branch fix/1216-filehandle-scalar-coverage, based directly on master at head e99929c.
Checkpoint: 2026-11-04; PR #1971 adds real-filesystem input coverage and no longer depends on #1649.
Evidence:
filehandle_input_real_file_scalar_output.tpasses system Perl, JVM, and interpreter. Template::Like 0.12t/input.tpasses 13/13 on all three runtimes using the exact PR build.nice -n 19 timeout 3600 makepasses on e99929c in 8m51s.Resolution: the previously reported interpreter sequence failure no longer reproduces; PR #1781 contains the underlying I/O fix. Issue #1216 is closed with the retest evidence; #1971 remains open for review.
Next: respond to review on PR #1971.
test(io): cover real-file input to scalar output (#1216)
fglock commentedon Nov 4, 2026
Retested Template::Like 0.12 t/input.t on the exact PR #1971 build e99929c: 13/13 pass on system Perl, JVM, and interpreter. The filehandle-input assertion passes after the earlier input cases on all three runtimes. PR #1781 contains the underlying I/O fix; PR #1971 adds direct real-file regression coverage and is open for review. Closing as resolved.
Merge pull request #1971 from fglock/fix/1216-filehandle-scalar-coverage