| Ticket UUID: | 7346adc50fac47b5e7d3c7921d107457883846cc | |||
| Title: | Crash with encoding convertfrom iso2022-jp <string with escape sequence> | |||
| Type: | Bug | Version: | 9.0.1 | |
| Submitter: | anonymous | Created on: | 2025-05-25 15:52:49 | |
| Subsystem: | 11. Conversions from String | Assigned To: | apnadkarni | |
| Priority: | 5 Medium | Severity: | Severe | |
| Status: | Closed | Last Modified: | 2025-05-26 10:34:54 | |
| Resolution: | Fixed | Closed By: | apnadkarni | |
| Closed on: | 2025-05-26 10:34:54 | |||
| Description: |
I hit an "Illegal instruction" crash while trying to parse old archived usenet posts with the mime library. I can reproduce the issue with a single line: % ::encoding convertfrom iso2022-jp "\x1b\$B\$*;n\$" unable to realloc 82463372083200 bytes Illegal instruction The same code works without crashing in Tcl 8.6.10: % ::encoding convertfrom iso2022-jp "\x1b\$B\$*;n\$" お試 % I have not dug into the C code involved here, but I would suspect that some length calculation has got broken in the 32->64bit transition. | |||
| User Comments: |
apnadkarni added on 2025-05-26 10:34:54:
Thanks for the review, Jan and @cgm for the report. Fixed now in [237ff71b86]. jan.nijtmans added on 2025-05-26 08:02:27: Good catch! Looks good to me. I agree with handling tcl8 the same as replace here, the tcl 8.6 behavior is simply broken (too). I don't think it's really worth to backport the fix to 8.6 too. apnadkarni added on 2025-05-26 05:17:43: Proposed fix in [0ca96a7829] ready for review. apnadkarni added on 2025-05-25 17:20:53: so ICU sees the string as not valid but of course that is no excuse for Tcl to go into a tizzy instead of raising an error. apnadkarni added on 2025-05-25 16:45:55: Reproduced. Looking into it... | |||
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