Bug 253102
| Summary: | gfortran generates incorrect code for temporary array of strings | ||||||
|---|---|---|---|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Ben Webb <benmwebb> | ||||
| Component: | gcc | Assignee: | Jakub Jelinek <jakub> | ||||
| Status: | CLOSED ERRATA | QA Contact: | Fedora Extras Quality Assurance <extras-qa> | ||||
| Severity: | medium | Docs Contact: | |||||
| Priority: | medium | ||||||
| Version: | 7 | ||||||
| Target Milestone: | --- | ||||||
| Target Release: | --- | ||||||
| Hardware: | All | ||||||
| OS: | Linux | ||||||
| Whiteboard: | |||||||
| Fixed In Version: | 4.1.2-27.fc7 | Doc Type: | Bug Fix | ||||
| Doc Text: | Story Points: | --- | |||||
| Clone Of: | Environment: | ||||||
| Last Closed: | 2007-09-28 21:24:45 UTC | Type: | --- | ||||
| Regression: | --- | Mount Type: | --- | ||||
| Documentation: | --- | CRM: | |||||
| Verified Versions: | Category: | --- | |||||
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |||||
| Cloudforms Team: | --- | Target Upstream Version: | |||||
| Embargoed: | |||||||
| Attachments: |
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Created attachment 161701 [details]
test.F90, minimal Fortran 90 testcase
gcc-4.1.2-18.fc7 has been pushed to the Fedora 7 testing repository. If problems still persist, please make note of it in this bug report. gcc-4.1.2-27.fc7 has been pushed to the Fedora 7 stable repository. If problems still persist, please make note of it in this bug report. |
Description of problem: The attached test.F90 contains a subroutine which constructs a temporary array of strings from one of its own input strings. The code will compile, but the resulting program crashes when run. Version-Release number of selected component (if applicable): gcc-gfortran-4.1.2-12 (latest gfortran for Fedora 7 i686 and x86_64) gcc-gfortran-4.1.1-52.el5.2 (latest gfortran for RHEL 5 ia64) How reproducible: Always (at least on the i686, x86_64, and ia64 boxes I've tried it on) Steps to Reproduce: 1. Compile the test program with 'gfortran -g test.F90' 2. Run it with './a.out' Actual results: Program crashes with a segmentation fault. gdb output suggests that the heap is corrupted: Program received signal SIGSEGV, Segmentation fault. 0x4f793756 in _int_free () from /lib/libc.so.6 (gdb) bt #0 0x4f793756 in _int_free () from /lib/libc.so.6 #1 0x4f797430 in free () from /lib/libc.so.6 #2 0x4f8f50c1 in _gfortran_internal_free () from /usr/lib/libgfortran.so.1 #3 0x0804874e in __testmod__test_sub (padstr=@0xbf912523, strarr=@0xbf9124d3, _padstr=5, _strarr=80) at test.F90:14 #4 0x080487f0 in MAIN__ () at test.F90:27 #5 0x08048827 in main () Expected results: Program should run to completion (as in fact it does when compiled with NAG, PGI or Intel Fortran compilers).