From af5300fe24bf2f4e032d639a5396a16c1762b77b Mon Sep 17 00:00:00 2001 From: Tom de Vries Date: Tue, 7 Dec 2021 07:35:10 +0100 Subject: [PATCH] [gdb/ada] Fix assert in ada_is_unconstrained_packed_array_type On openSUSE Leap 42.3, with system compiler gcc 4.8.5 I run into: ... (gdb) print u_one_two_three^M src/gdb/gdbtypes.h:1050: internal-error: field: \ Assertion `idx >= 0 && idx < num_fields ()' failed.^M ... We run into trouble while doing this in ada_is_unconstrained_packed_array_type: ... 1953 return TYPE_FIELD_BITSIZE (type, 0) > 0; ... which tries to get field 0 from a type without fields: ... (gdb) p type->num_fields () $6 = 0 ... which is the case because the type is a typedef: ... (gdb) p type->code () $7 = TYPE_CODE_TYPEDEF ... Fix this by using the type referenced by the typedef instead. Tested on x86_64-linux. Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=28323 --- gdb/ada-lang.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/gdb/ada-lang.c b/gdb/ada-lang.c index f8ba05b4276..336d950ec1d 100644 --- a/gdb/ada-lang.c +++ b/gdb/ada-lang.c @@ -1949,6 +1949,8 @@ ada_is_unconstrained_packed_array_type (struct type *type) /* The structure's first field is a pointer to an array, so this fetches the array type. */ type = TYPE_TARGET_TYPE (type->field (0).type ()); + if (type->code () == TYPE_CODE_TYPEDEF) + type = ada_typedef_target_type (type); /* Now we can see if the array elements are packed. */ return TYPE_FIELD_BITSIZE (type, 0) > 0; } -- 2.30.2