rust: handle I/O errors in process_word_file (fixes #1990)

[Shaik-Mudassir2001]

[FIX] Fix #1990: Handle I/O errors in Rust word file parser

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---

Description

This Pull Request addresses a stability issue in the Rust-based parser where the application would panic and terminate if it encountered a reading error in an external word file (such as a capitalization or profanity list).

Changes:

• Modified process_word_file in src/rust/src/parser.rs: Replaced the .unwrap() call on reader.lines() with an explicit match statement.
• Error Recovery: Instead of crashing, the program now catches the Err, prints a descriptive message to stderr including the line number and filename, and uses continue to proceed with the rest of the file.

This ensures that a single corrupted line or an I/O hiccup does not interrupt the entire extraction process, making the tool significantly more robust for automated workflows.

Related Issue

Fixes #1990

Checklist

• Verified code change with cargo check.
• Updated docs/CHANGES.TXT with a brief description of the fix.

[ccextractor-bot]

CCExtractor CI platform finished running the test files on linux. Below is a summary of the test results, when compared to test for commit 477307e...:

Report Name	Tests Passed
Broken	13/13
CEA-708	14/14
DVB	7/7
DVD	3/3
DVR-MS	2/2
General	25/27
Hardsubx	1/1
Hauppage	3/3
MP4	3/3
NoCC	10/10
Options	81/86
Teletext	21/21
WTV	13/13
XDS	34/34

Your PR breaks these cases:

• ccextractor --autoprogram --out=ttxt --latin1 --ucla dab1c1bd65...
• ccextractor --out=srt --latin1 --autoprogram 29e5ffd34b...
• ccextractor --startcreditstext "CCextractor Start crdit Testing" c4dd893cb9...
• ccextractor --startcreditsnotbefore 1 --startcreditstext "CCextractor Start crdit Testing" c4dd893cb9...
• ccextractor --startcreditsnotafter 2 --startcreditstext "CCextractor Start crdit Testing" c4dd893cb9...
• ccextractor --startcreditsforatleast 1 --startcreditstext "CCextractor Start crdit Testing" c4dd893cb9...
• ccextractor --startcreditsforatmost 2 --startcreditstext "CCextractor Start crdit Testing" c4dd893cb9...

Congratulations: Merging this PR would fix the following tests:

• ccextractor --autoprogram --out=srt --latin1 --quant 0 85271be4d2..., Last passed: Never

It seems that not all tests were passed completely. This is an indication that the output of some files is not as expected (but might be according to you).

Check the result page for more info.

[ccextractor-bot]

CCExtractor CI platform finished running the test files on windows. Below is a summary of the test results, when compared to test for commit 477307e...:

Report Name	Tests Passed
Broken	13/13
CEA-708	14/14
DVB	6/7
DVD	3/3
DVR-MS	2/2
General	25/27
Hardsubx	1/1
Hauppage	3/3
MP4	3/3
NoCC	10/10
Options	80/86
Teletext	21/21
WTV	13/13
XDS	34/34

Your PR breaks these cases:

• ccextractor --autoprogram --out=srt --latin1 --quant 0 85271be4d2...
• ccextractor --autoprogram --out=ttxt --latin1 --ucla dab1c1bd65...
• ccextractor --out=srt --latin1 --autoprogram 29e5ffd34b...
• ccextractor --out=spupng c83f765c66...
• ccextractor --startcreditstext "CCextractor Start crdit Testing" c4dd893cb9...
• ccextractor --startcreditsnotbefore 1 --startcreditstext "CCextractor Start crdit Testing" c4dd893cb9...
• ccextractor --startcreditsnotafter 2 --startcreditstext "CCextractor Start crdit Testing" c4dd893cb9...
• ccextractor --startcreditsforatleast 1 --startcreditstext "CCextractor Start crdit Testing" c4dd893cb9...
• ccextractor --startcreditsforatmost 2 --startcreditstext "CCextractor Start crdit Testing" c4dd893cb9...

It seems that not all tests were passed completely. This is an indication that the output of some files is not as expected (but might be according to you).

Check the result page for more info.

[cfsmp3]

Merge conflicts and a leftover commented out line - please update this PR, thanks.

[cfsmp3]

See comment

[Shaik-Mudassir2001]

done

[cfsmp3]

This PR still has merge conflicts. Please rebase on master to resolve them.

git fetch origin
git rebase origin/master
# resolve any conflicts
git push --force-with-lease

Thanks!

[cfsmp3]

Closing - this issue is now fixed by #2036 which takes a simpler approach (using ? operator instead of verbose match with error logging). Thank you for the contribution!