https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112946
Bug ID: 112946
Summary: Assignment of string to enumeration or set crashes
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: modula2
Assignee: gaius at gcc dot gnu.org
Reporter: juriad at gmail dot com
Target Milestone: ---
Created attachment 56846
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=56846&action=edit
reproducer + gcc crash output + crash report
I am playing with Modula-2 (due to Advent of Code). I compiled GCC from master
branch (fbfe43daec6443978df65530dc5f7f3f8a4e6f9e).
The attached program crashes when compiling (the error differs between strings
of length 1 and 2):
gm2 -freport-bug -fiso -static-libgm2 -o prg bug.mod
The full output is attached as well as the referenced report from /tmp/:
cc1gm2: internal compiler error: tree check: expected integer_cst, have
string_cst in get_len, at tree.h:6473
The expected behavior would be to show the error as usual with highlighted line
and explanation.
Apart from this crash, I encountered one more issue which may not be an error
(no idea; I have less than 1 day of experience with Modula) but would deserve
at least a warning. Arithmetic between set and enumeration does not produce
what I would expect.
DIRS := Dirs{Left, Right};
DIRS := DIRS + Up;
IF NOT (Up IN DIRS) THEN
HALT
END;
On the other hand:
DIRS := Dirs{Left, Right} + Up;
leads to another crash:
cc1gm2: internal compiler error: expecting type of constant to be a set
