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* [Bug symtab/29323] New: [gdb/symtab] read.c:3963: internal-error: dw2_expand_symtabs_matching_one: Assertion `symtab != nullptr' failed.
@ 2022-07-06 14:28 vries at gcc dot gnu.org
2022-07-06 14:28 ` [Bug symtab/29323] " vries at gcc dot gnu.org
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: vries at gcc dot gnu.org @ 2022-07-06 14:28 UTC (permalink / raw)
To: gdb-prs
https://sourceware.org/bugzilla/show_bug.cgi?id=29323
Bug ID: 29323
Summary: [gdb/symtab] read.c:3963: internal-error:
dw2_expand_symtabs_matching_one: Assertion `symtab !=
nullptr' failed.
Product: gdb
Version: HEAD
Status: NEW
Severity: normal
Priority: P2
Component: symtab
Assignee: unassigned at sourceware dot org
Reporter: vries at gcc dot gnu.org
Target Milestone: ---
With test-case gdb.dwarf2/struct-with-sig.exp and target board
cc-with-debug-names I run into:
...
(gdb) ptype struct s^M
/home/vries/gdb_versions/devel/src/gdb/dwarf2/read.c:3963: internal-error:
dw2_expand_symtabs_matching_one: Assertion `symtab != nullptr' failed.^M
A problem internal to GDB has been detected,^M
further debugging may prove unreliable.^M
----- Backtrace -----^M
FAIL: gdb.dwarf2/struct-with-sig.exp: struct s with int i (GDB internal error)
...
This is easily enough fixed by:
...
diff --git a/gdb/dwarf2/read.c b/gdb/dwarf2/read.c
index 017cde0dcd9..97be0aaa0db 100644
--- a/gdb/dwarf2/read.c
+++ b/gdb/dwarf2/read.c
@@ -3960,9 +3960,8 @@ dw2_expand_symtabs_matching_one
compunit_symtab *symtab
= dw2_instantiate_symtab (per_cu, per_objfile, false);
- gdb_assert (symtab != nullptr);
- if (expansion_notify != NULL && symtab_was_null)
+ if (symtab != nullptr && expansion_notify != NULL && symtab_was_null)
return expansion_notify (symtab);
}
return true;
...
Still, we're trying to print struct s, in the context of main, which has a
struct s decl with sig reference to a struct s in a TU.
So why are we're trying to instantiate the dummy CU at offset 0x9a:
...
Compilation Unit @ offset 0x8f:
Length: 0x7 (32-bit)
Version: 4
Abbrev Offset: 0x59
Pointer Size: 8
Compilation Unit @ offset 0x9a:
...
which contains no symbols and is indeed not listed as containing any symbols in
the .debug_names index?
Is this because the index is missing information? That is, it has:
...
[ 15] #0002b618 s:
<5> DW_TAG_structure_type DW_IDX_type_unit=0 DW_IDX_GNU_internal=1
<5> DW_TAG_structure_type DW_IDX_type_unit=1 DW_IDX_GNU_internal=1
...
but there's no indication that the foo and main compilation units also contain
those types (using aforementioned decl-with-sig-ref).
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* [Bug symtab/29323] [gdb/symtab] read.c:3963: internal-error: dw2_expand_symtabs_matching_one: Assertion `symtab != nullptr' failed.
2022-07-06 14:28 [Bug symtab/29323] New: [gdb/symtab] read.c:3963: internal-error: dw2_expand_symtabs_matching_one: Assertion `symtab != nullptr' failed vries at gcc dot gnu.org
@ 2022-07-06 14:28 ` vries at gcc dot gnu.org
2022-07-08 7:39 ` vries at gcc dot gnu.org
2022-07-12 12:22 ` vries at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: vries at gcc dot gnu.org @ 2022-07-06 14:28 UTC (permalink / raw)
To: gdb-prs
https://sourceware.org/bugzilla/show_bug.cgi?id=29323
Tom de Vries <vries at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |simark at simark dot ca,
| |tromey at sourceware dot org
--
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^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug symtab/29323] [gdb/symtab] read.c:3963: internal-error: dw2_expand_symtabs_matching_one: Assertion `symtab != nullptr' failed.
2022-07-06 14:28 [Bug symtab/29323] New: [gdb/symtab] read.c:3963: internal-error: dw2_expand_symtabs_matching_one: Assertion `symtab != nullptr' failed vries at gcc dot gnu.org
2022-07-06 14:28 ` [Bug symtab/29323] " vries at gcc dot gnu.org
@ 2022-07-08 7:39 ` vries at gcc dot gnu.org
2022-07-12 12:22 ` vries at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: vries at gcc dot gnu.org @ 2022-07-08 7:39 UTC (permalink / raw)
To: gdb-prs
https://sourceware.org/bugzilla/show_bug.cgi?id=29323
--- Comment #1 from Tom de Vries <vries at gcc dot gnu.org> ---
No longer fails with the tentative fix for PR29334, so probably a duplicate.
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* [Bug symtab/29323] [gdb/symtab] read.c:3963: internal-error: dw2_expand_symtabs_matching_one: Assertion `symtab != nullptr' failed.
2022-07-06 14:28 [Bug symtab/29323] New: [gdb/symtab] read.c:3963: internal-error: dw2_expand_symtabs_matching_one: Assertion `symtab != nullptr' failed vries at gcc dot gnu.org
2022-07-06 14:28 ` [Bug symtab/29323] " vries at gcc dot gnu.org
2022-07-08 7:39 ` vries at gcc dot gnu.org
@ 2022-07-12 12:22 ` vries at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: vries at gcc dot gnu.org @ 2022-07-12 12:22 UTC (permalink / raw)
To: gdb-prs
https://sourceware.org/bugzilla/show_bug.cgi?id=29323
Tom de Vries <vries at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #2 from Tom de Vries <vries at gcc dot gnu.org> ---
No longer fails on master, marking as duplicate.
*** This bug has been marked as a duplicate of bug 29334 ***
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2022-07-06 14:28 [Bug symtab/29323] New: [gdb/symtab] read.c:3963: internal-error: dw2_expand_symtabs_matching_one: Assertion `symtab != nullptr' failed vries at gcc dot gnu.org
2022-07-06 14:28 ` [Bug symtab/29323] " vries at gcc dot gnu.org
2022-07-08 7:39 ` vries at gcc dot gnu.org
2022-07-12 12:22 ` vries at gcc dot gnu.org
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