0000549: Segmentation fault building stage 3 dependencies with GCC 9, -O6 and debug grades

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Date Submitted

Last Update

0000549

mercury

Bug

public

2022-02-18 22:50

2022-03-01 13:57

Reporter

juliensf

Assigned To

Priority

normal

Severity

minor

Reproducibility

have not tried

Status

new

Resolution

open

Product Version

Target Version

Fixed in Version

Summary

0000549: Segmentation fault building stage 3 dependencies with GCC 9, -O6 and debug grades

Description

Build staging 3 source file mappings or dependencies causes a segmentation fault when bootchecking
in either of the grades asm_fast.gc.debug.stseg or asm_fast.gc.decldebug.stseg. This occurs (only) when
compiling with -O6 (with and without --intermod-opt).

Mercury: 22.01-beta-2022-02-16
C compiler: GCC 9.3.1
OS: CentOS 7

The issue did not occur with same optimisation settings and GCC 4.8.5 on the same machine.
(I have GCC versions 10 and 11 installed on the same machine and will try them as well.)

Additional Information

make: Target 'dep_library' not remade because of errors.
cd mdbcomp && PATH=../scripts:../util:../mfilterjavac:../../mfilterjavac:$PATH MMAKE_VPATH=. MMAKE_DIR=../scripts DESTDIR= ../scripts/mmake mer_mdbcomp.depend
gmake[1]: Entering directory '/home/jfischer/release/mercury.git/stage3/mdbcomp'
config.status: creating MDBCOMP_FLAGS
/home/jfischer/release/betas/22.01-beta-2022-02-12/bin//mmc --grade asm_fast.gc.debug.stseg -O6 --intermod-opt --flags MDBCOMP_FLAGS -f *.m

*** Mercury runtime: caught strange segmentation violation ***
PC at signal: 28623904 (1b4c420)

--------------------------------------------------------------------

home/jfischer/release/betas/22.01-beta-2022-02-12/bin//mmc --grade asm_fast.gc.decldebug.stseg -O6 --intermod-opt --flags GRADE_LIB_FLAGS -f *.m
Uncaught Mercury exception:
Software Error: predicate `io.record_env_var_equal_value'/3: Unexpected: No = in environment entry
Stack dump follows:
   0 pred exception.throw_impl/1-0 (erroneous) (exception.m:695)
   1 pred exception.throw/1-0 (erroneous) (exception.m:313)
   2 pred require.error/1-0 (erroneous) (require.m:172)
   3 pred require.unexpected/2-0 (erroneous) (require.m:203)
   4 pred io.record_env_var_equal_value/3-0 (det) (io.m:11818)
reached unknown label

Notes
~0001180 juliensf (administrator) 2022-02-27 02:19	The issue does not occur with GCC 10.

~0001181 juliensf (administrator) 2022-03-01 13:57	The issue also does not occur with GCC 11.

Date Modified	Username	Field
Issue History
2022-02-18 22:50	juliensf	New Issue
2022-02-27 02:19	juliensf	Note Added: 0001180
2022-03-01 13:57	juliensf	Note Added: 0001181

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